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Sr20det lean idle

sr20det lean idle 1v at idle. . I have an AEM Uego and it reads off the chart most of the time, but when I do get any reading, its at around 17-18 afr. I have an aem wideband where I base all my readings. Engine: Sr20det, stock internals, gt3076r on 11psi, stock injectors, factory tuneSo my car is running EXTREMELY lean, 18+:1, under idle. This is adjusted when changing injectors or air flow meters •Changing this parameter however also adjusts load calculations used by the Step5- adjust idle, turn idle screw ON IACV NOT THROTTLE BODY, clockwise or counterclockeise as needed. If the valve fails or has any issues it can cause the idle speed to be thrown off. Slowly lean the mixture until engine operation becomes rough or until engine power rapidly diminishes as noted by an undesirable decrease in airspeed. 6 GPH by adjusting the mixture control after setting the throttle to 2500 RPM with maximum manifold pressure. 2. Nissan S14 SR20 (76-pin ECU) MaxxECU Plugin ECU for Nissan S14 with SR20 engine It is a lot harder to lean out ECU's that use Target AFR's. . You could attempt to reduce the idle by lowering the the idle adjustment screw on the throttle body. Hi, Little introduction: My name is Randy and i am the proud owner of a 280zx 1979 2+2. What size jets do you run for primary and secondary on a weber 32/36 DGEV? Stock L20b rebuilt . The issue I have been having is that my car runs horribly rich at idle, high 9's low 10's very unsteady. also, my afrs at idle and while cruising seem to be consistent with everyone elses, but mine at WOT are still lean. The idle stays high with the timing sitting steady at 15 degrees. This is not a good idea either, because OBD2 ECU's rely heavily on the O2 sensor and tend to lean out under boost for a few seconds. Choosing the correct break-in oil is pivotal for proper engine break-in. The result is better climb performance and a needed boost in useful load. this truck has a 5. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. i only looked at idle and it idles good, it goes up and down though. Attach a fuel pressure gauge to the fuel pump test fitting at the end of the fuel rail on the engine. I am having an issue with a S14 SR20det in a friends car. Prop and Spinner Check Va 131 Mixture Full Rich Throttle Idle Air Inlets Clear Vfe 50% 120 Fuel Pump Check Mixture Idle Cutoff Landing Light Condition Vfe 100% 100 Instruments Check Avionics Off Nose Gear and Strut Condition Vno 165-200 Speed Vy Alternator Masters Off Oil Quantity 7-8 QTS Vne 200 Battery Masters Off Chocks Remove Vglide 96-87 The Infinity ECU for manual transmission equipped 1994-96 Nissan Silvia SR20DET racing engines (Infinity 506 PN 30-7106 and Infinity 508 PN 30-7108) includes an engine-specific start-up calibration and connects to the engine via a Plug & Play harness that is sold separately (PN 30-3517). It affects the amount of valve overlap; that is the brief period of time when both the intake and exhaust valves are open. I've had it idling (not driving as I'm still finishing the rest of the car). During dyno tuning she feels great until after a couple pulls and then she goes crazy lean across the board. What else would cause it to go lean after about 5 to 10 seconds of starting the car while connected to the ECU? yea the wideband cant even read it its so lean. 7, 1. at cruise afr is around 11. What does rich or lean mean? Which one is best? Theory AND practical demonstration on our Mainline dyno. Fuel pressure stays about 40-45 at idle. Symptoms Of A Bad Nissan Sentra MAF Sensor. Timing is swinging from 7 deg to 24 deg, and afr goes super lean, which is not a fuel map issue, or timing on the timing map, and idle timing control has a max value of 4 deg, so no idea how the timing can swing so far. also when i drive the car and just pop SR20DET has lots of potential for your tuning project. 4. Now it is between 32 and 44 mpg. idle fluctuates. choke plate doesnt open fully cuasing a high speed air blockage(if a manual choke or automatic needs to be adjusted) Attach a fuel pressure gauge to the fuel pump test fitting at the end of the fuel rail on the engine. Make any adjustments to your idle mixture by turning the very bottom thumb screws counter clockwise to richen and clockwise to lean. 7 afr. I don't know how the sr20det responds to too much fuel, but the engine i am running (mazda 1. What size jets do you run for primary and secondary on a weber 32/36 DGEV? Stock L20b rebuilt . Find the appropriate pressure specifications for your vehicle in its repair manual and then compare it to the readings you get when the engine running at an idle, and then at the RPMs specified in the repair manual. Before I was getting between 32 to 38 mpg. Apr 20, 2014 #1. Runs lean. 8 bpt) won't stall that easily on a rich condition, it could idle at 10 afr without any issues. since starting lean diagnosis I have: cleaned maf. It is a lot harder to lean out ECU's that use Target AFR's. As you said, it could be a great number of things. The lobe separation angle is the angle in camshaft degrees between the maximum lift points, or centerlines, of the intake and exhaust lobes. The reason for the length is to avoid turbulence and get a running lean condition. But, what it sounds more like, is a problem with your throttle cable spring/set up. For this symptom set I graph the following PIDs: O2b1s1, Inj time, SFFT, LTFT, RPM, Then make a graph from idle, a few seconds of steady cruise then wide open throttle through the 1-2 shift. When you're at 15BTDC + - 2 degrees, tighten down the cas shut down the car and reconnect the tps. . 240msh. It's still reading 3-4% lean after idling for a while. problem comes and goes. Reinstall the cover. Depending on the system (and I don't know Nissan's at all) it can provide a reference for: cruise control, lean mixing for light-throttle cruising, idle speed (eg so it won't stall shifting from 4th to 5th or coming to a stop from high speed), overdrive in auto trannies, and ABS (not in this setup of course). No matter what I do, I can't get the car to idle clean or any richer than 15. now if you introduce a 15sec spray of carb/brake clean to the MAF filter (z32 MAF) and then start it up, it idles and runs perfect and shows good readings on the wide band, and then after the carb/brake clean evaporates/gets used I have a 1989 240sx with an sr20det swap. The Process (SR20DET) Turbo SR20 engines are different in that they have a coil on plug arrangement instead of a distributor cap. 7:1 for gasoline, and you’re good to go. good idle with MAF sensor unplugged. LEAN as Required SR20/SR22 - Use the Lean Assist feature on the MFD Engine page to set the mixture control for Best Power or Best Economy. Also MAF sensor fails sometimes. Since the timing advances more and more with higher RPMs, it’s only calibrated to 15-17 degrees BTDC (your preference) very near the 750-800 RPM base idle. Have you checked your wideband? I don't know how the sr20det responds to too much fuel, but the engine i am running (mazda 1. car runs good untill high speed= pluggedd fuel pilter 2ndary jet maybe plugged. I ask because it has 140s for both primary and secondary which makes absolutely no sense when the barrels are different sizes. If idle is too low it'll tip in a bit extra. The reality is that lean idle mixtures minimize temperature gain as less heat is exposed to the cooling system because less fuel is combusted. By using a blow-through method, the MAF won't be affected by the blowoff valve opening as the pressure is vented before the air reaches the MAF. Hi everbody I have a 180sx SR20DET and need to know what sensor or thing determins when the engine is cold and requires extra idle. It affects the amount of valve overlap; that is the brief period of time when both the intake and exhaust valves are open. This is not a good idea either, because OBD2 ECU's rely heavily on the O2 sensor and tend to lean out under boost for a few seconds. I took a few screen shots of it. Running Lean at Idle and Throttle Sputter. So if idle is turned up too high for some reason you'll often see less timing than you'd expect. but it has 750cc injectors with rail and fpr on stock tune. What would be the best way to get the idle steady? Here is my setup: S13 SR20DET stock bottom end Cometic HG BC 264 Z32 Maf BC Valvesprings Top Feed Low impedance 75lb injectors 50 trim t3/t4 if you throw a reg in it, with the vaccume OFF on idle your fuel pressure should be set to 3 bar on the nose, take your time dialing it in and getting it right, you will be shocked at how it changes how your sr20 runs , For engines equipped with controllable pitch propellers, lean until a slight increase of airspeed is noted. 3) EGR staying partially open. I don't think any that matters however. If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator Idle then cuts out when gas is pushed= accell pump on carb or the main fuel jet is plugged. Just wondering if any FWD SE-R guys have yet to use E-85 as a fuel option. The car's AF ratio is 12. com Nissan SR20DE/SR20DET engine problems and malfunctions. I know many people in South Florida are using it. 10: 1,712: Weird sr20det lean out issue at start up and cruising. ? (3 bar program). S13 SR20 Lean Idle [Help] At cold idle no problems dose sit high though as soon as it's warmed up it just idles bad will sit on 900-1000 but as soon as you give it any revs it will di My SR20det is showing really lean on my aem uego wide band and will not idle and cannot be held at a specific rpm, only feathering the throttle will keep it running. CIRRUS SR20 NORMAL CHECKLIST Best Economy = 50° Lean of Peak EGT 65% Power or Less Approach Settings: MP KIAS FLAPS IDLE Ignition Switch I can't fix my idle issue. You basically have to keep the values below 14. For a given power setting, best economy mixture provides the most miles per gallon. 8 adjust lag time to 0. 1. 8:1 on E85. 5 Posts. If it was staying partially or fully open at idle, the mixture would be wrong (too lean?) causing the bad idle. Also, when the throttle is suddenly shut, the fuel mixture suddenly becomes lean which creates NOx (oxides of Nitrogen) which also contributes to emissions. I know there is a temperature sensor and all but is it the temperature sensor that tells the computer thats its cold and therefore the computer increases the idle throught the idle control valve or is it some other sensor. 2. What I did with the setting was change poll to low and raise the fuel req to 5. Well long story short, I fire it up, it's running fine, but when it warms up enough to go to a hot idle rpm, it goes SUPER lean. Reply to this topic; Start new Set your idle to 800 + or - 50 rpm and check over your timing. Minot, North Dakota. This is supposed to shut off at idle, and in some other conditions. The idle of a car engine is kind of like a human heartbeat: You can tell what shape it's in just by listening. Idle Jets and tuning the idle circuit: Very Simply. I'm happy with the performance I have now. rough idle very lean sr20det By jessejames, August 10, 2013. 2 years ago. While the engine is cold the (PCM) will remain in “open loop” and keep the fuel mixture rich; to improve idle quality and cold driveability. 8:1 (stoich of E85), thereby producing a voltage that corresponds to stoich/lambda. now if you introduce a 15sec spray of carb/brake clean to the MAF filter (z32 MAF) and then start it up, it idles and runs perfect and shows good readings on the wide band, and then after the carb/brake clean evaporates/gets used AFR's on sr20det at Idle goes normal then rich at idle. ryder2101. Choosing the correct break-in oil is pivotal for proper engine break-in. Refer to TPS Adjustment section. Limit is . 8 to 1. 7 cruising, and of the charts lean at idle. TalonEsi_96 Proven Member. But I think we may be on to something. However, when I leave the car idling for about 2-3 mins, the wideband seems to fluctuate a lot. vaccume diaphrame has hole. Above the exhaust was black, I painted the car a week ago and it's black again. Hey Everyone. My father turned down the timing as low as it would go. " The SR20DET is a fantastically tunable engine from Nissan and is extremely strong and reliable. 0 under boost, around 14. The most common symptoms of a bad MAF sensor are: A MAF sensor code. How does your AFR influence engine performance, speci But if I stay in the same cell and increase throttle from say 2% to 10% slowly and continue to slowly press the throttle it will lean out say from . Posted by '95 Zenki KA-T. It runs fine under heavy load, light load, cruising speeds, and in traffic. Mechanic's Assistant: Does the engine stall right after starting? And what about hesitation or jerking during acceleration? Yes with the MAF sensor plugged in. Idle up steps adder (steps): Available on vehicles that use a stepper sytle idle valve when an open loop, “warm up only†idle valve algorithm is requested. This should get you real close to optimal setting. I live in The Netherlands and bought this car 2 years ago. Hey all, forgive if in the wrong area. If I adjust the throttle idle screw and throttle cable to drop the RPM's to around 1000rpms the A/F jumps up to 15. First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). 1 reply; 980 views; Big Ben; September 5, 2013; rough idle very lean sr20det By The reality is that lean idle mixtures minimize temperature gain as less heat is exposed to the cooling system because less fuel is combusted. 7 and turn the K value way down. The computer then looks at the higher idle speed and takes a second look at the air and engine temperature and then looks at the fact that your foot is off the gas. With engine off, remove the air filter and pump the throttle by hand while looking down the primary throttle bore (closest to the valve cover) You should see a strong squirt of raw fuel from the accelerator pump. Runs fine off idle and in boost. The oxygen sensor sees a lean exhaust stream. The wideband that is installed is reading lean at idle only, in the neighborhood of 18:1 and higher the gauge doesnt go past 18. 8 - 16. If you can get your idle speed set correctly first - then you'll usually see a nice solid 15 degrees and it'll make checking/setting the timing easier. In the TEST 3 section of this article, I'll show how you'll use a base voltage reading at idle from the MAF sensor that will help you to confirm that the MAF sensor is bad or not. 3. I'm afraid that might be dangerous. Members #1 · March 19, 2019, 6:33 pm I have installed the Fitech on a SBC in a 71' C10. Video via YouTube channel Moto-East Tuning Odds are that is the correct diagnosis. ISR Performance OE Replacement Idle Air Control Valve (IACV) Gasket - Nissan 240SX 89-94 S13 RWD SR20DET $ 4 25 P2M Thermal Intake Manifold Gasket - Nissan 240SX S13 SR20DET 1971 White S15 SR20DET. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. U67 head, stock cam. 5mm fuel hole and the F8 Refers to the Air Bleed hole in the side. A couple of things with the car. Normally it'll drop down after only a min or 2, or if I give it some gas. My 180 has an S14 SR20DET and a T28bb. replaced MAF sensor. The engine just got a full rebuild and has been switched over to E85. 3 LS engine with a S475 turbo on it. Timing is adjusted by rotating the crank angle sensor instead. Any clue what is going on here? It's a 5. Joined Dec 14, 2008. SR engines are very reliable and durable. Timing is swinging from 7 deg to 24 deg, and afr goes super lean, which is not a fuel map issue, or timing on the timing map, and idle timing control has a max value of 4 deg, so no idea how the timing can swing so far. Fuel pressure stays about 40-45 at idle. It doesn't want to idle, bogs under throttle, and runs horribly. 176 6. Almost every quality oil company offers a break-in oil that dispenses with some of the additives that can inhibit the break-in Well lads, need a bit of help tryin to figure out what wrong with my car. As for starting, you should take a look at the prime and maybe post-start enrichment maps. Runs with it unplugged. Fuel Trim code(s). It is going lean because the pistons are moving up immediately. An idle surge can be caused by multiple phenomena. A lot of high whp guys are using it and loving it. Almost every quality oil company offers a break-in oil that dispenses with some of the additives that can inhibit the break-in I think the only issue I have now is because of the long tubes. Stay tuned for the part 2! SSonic92 Posts: 116 Joined: Sat Jul 31, 2010 11:07 am Car: 1995 Nissan Altima almost done. That is not "fuel enrichment", it is fuel deprivation leading to backfire. didnt look at exhaust. It also will pop the occasional flame, sometimes even if I'm just gearing down to 2nd to slow down at the lights I am currently reading the service manuals and these are the things I am going to check The entry-level SR20 G6 loses its six-cylinder Continental in favor of a four-cylinder Lycoming. The car starts and runs GREAT except for what I think is a high idle when first cranked in the Summer(it takes about 4 mins to idle down to what feels/sounds normal w/ no A/C on), but…if I have to drive up a hill, which are numerous around here, it acts like I’m towing an 18 wheeler with a full tanker on it, and the car’s A/C on. If I unplug the maf Another tricky one – the timing needs to be set at exactly the base idle. Sometimes a problem of rough idle appears. Slowly lean the mixture until engine operation becomes rough or until engine power rapidly diminishes as noted by an undesirable decrease in airspeed. With your timing light, make sure you are at 15° btdc. It surged for about 10 min, the. Car is running lean only at high rpms and full boost so wanted to check a few things. That raises the idle speed. 5 with vacuum connected right. . 5v at idle with the factory MAF. 9:1 Some engines use a switch on the TPS to provide this - SR20 ECU's simply look for a certain voltage on the TPS (Throttle Position Sensor). 01-17-2020 10:55 AM by 240msh. Temp does not get past 200 F before the fans kick in, so I know the engine is not running super hot. It is likely that if O2(B1S1) and INJ PID's were included these would show a lean O2 with a corresponding lengthening of injector on time. I've come across some info from Hahn Racecraft stating that RC 550cc injectors will cause a poor idle and low-end driveability so they offer 650cc/660cc Injectors to remedy the issue . I also want to note that I also had this leaning out issue before!, what caused it was my MAF being too close to my turbo, causing more air to be sucked AROUND the hotwire element than past it How to MegaSquirt your Nissan 240SX Updated 4/10/2019 – notes on ECCS relay with MSPNP added Using the stock ignition module with MegaSquirt Application(s): 1989-1998 Nissan 240SX with KA24E or KA24DE Other vehicles with KA series engines, such as Nissan pickup trucks, are similar. Example vehicle S14 200SX (SR20DET) •Upgraded injectors 370CC to 480CC •Upgraded MAF S14 SR20DET to R35 GTR •Nissan ECUsuse an ‘Load multiplier’(K constant)to apply a multiplication factor to fuelling. Let's also say your idle is dialed in great, and you're hitting a target AFR of 9. Even though my test of the EGR makes the engine idle worse, it wasn't that much worse so it could be partially open all the time. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. I have a 96 gxe with U12, 50 lbs injectors, z32 MAF, JWT fuel rail, walboro, and JWT ECU. When landing at higher density altitudes with the power lever at idle on rollout, it is to be expected that the engine may not be able to hold its idle RPM due to an excessively rich mixture. Strange observations: Can reduce idle and stall engine by crimping Throttle Bypass hose from intercooler pipe. His reason was the high idle. But afrs run rich at about 10 and sometimes 12. A 50 Idle jet is a . 4 Hey Guys! The 240sx Drift car has been dealing with a rather pecu Engines don’t like to idle lean; a lean air/fuel ratio is one of the biggest causes of a surging idle. 11-23-2013 03:26 PM 2) Idle Surging Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. 3l with a magnuson tvs 1900 kn cold air intake speed engineering long tubes mbrp catback but currently lean at idle just hoping someone can help me calibrate the maf or get it close I just fired up the car today. I would turn off any correction maps and get the base fuel map right. FACTS: NA-5spd swapped with JDM-GTE and AEM with a TT harness. It fine adjusts the idle mixture, period. Sometimes it goes down to 16 (very lean). Ensure the needle is moving and seating properly. 30% and the first time I got . 5mm fuel hole. P0100; Lean and/or Rich code(s). The ECU will only access the idle tables when the TPS Closed flag is set. For example, on a SR20DET engine, the MAF must be at least 12" (30cm) from the throttle plate, and the blowoff valve must be 6" (15cm) from the MAF sensor. The walbro brought my idle down into the 10-12 range. Lean the mixture to the appropriate X-T letters in MIXTURE immediately after landing and try to keep the power slightly higher than low idle to prevent The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. Fuel pressure good. You basically have to keep the values below 14. Today I fired up the engine and it idled a little high (1300 rpms), but it was a cold start. It will stall at idle and has a misfire. She's running quite rich. Then sometimes dies. When i was running 10-11 psi, i was getting the EXACT same afrs that i am getting at 8 psi. For a given power setting, best economy mixture provides the most miles per gallon. They are saying that they prefer it over C-16 and the fact 96 s14 w/ sr20det 5 spd. But once I plug in the maf the afrs go to around 17 to 16. This setting increases idle by commanding an additional number of steps as input into this cell. I don't think I will adjust the map anymore. One symptom that I keep hearing is really poor idle. That is until it idles for another minute or 2, then it goes back to reading lean again. The car will start now but dies immediately. 8 bpt) won't stall that easily on a rich condition, it could idle at 10 afr without any issues. Fuel pressure is at 43. 20wt dashpot oil is too thin in warm weather. The car doesn't So I finally have my SR20 running. Immediate stalling due to throttle movement sounds more like a lean than a rich condition to me. Pulls very strong through the gears and entire rev range. An idle surge can be caused by multiple phenomena. On the DCOE and IDA series carbs they have 2 numbers on them like 50F8. Archived. 8v which is precisely where I want it to be at idle. 2 it seems that the car isnt getting enough fuel at idle with stock ECU. Dislexicdime is right on target. 4 and struggle to run in the same cell as there's no real change in the VE table and is more severe than transient throttle can adjust for no matter how sensitive I make that. After about 5 min, it would drop down and do the idle surge. They do not have any great problems or faults. If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator The lobe separation angle is the angle in camshaft degrees between the maximum lift points, or centerlines, of the intake and exhaust lobes. See full list on diyautotune. I suspect fpr, it read normal fuel pressure on stock fuel pump, Troubleshooting A Rich Idle Lean Cruise / How To Clean A MAF Sensor / 240sx DRIFT PREP Ep. Mechanic's Assistant: What is the model/year of your Nissan? The first thing to do is not set up the idle speed, but to set the Idle mixture screw to lean best idle setting. As the title says, My 240 Sr swap will idle GREAT with the maf unplugged. Im not running 10 psi anymore. The car would idle normally and would drive perfectly. Check Engine Light comes on Idle Jets DCNF and IDF 74405 Series Idle Jets ADFA,ADHA,JCT,ICH,DPS,DGV,DGAV,DGEV,WITH IDLE CUT OFF SOLENOIDS 74409 Series Idle Jets 28/36 DCD,28/36 DLED,36 DCD,40DCN,40DCZ 74401 Series Most of the time it seems to around 14 (a little lean) at idle. 040 over. Notice the FSM page 115 says it should be . If I mess about with the CAS I can reduce the idle but obviously lose the timing. 5 at idle with vacuum disconnected, and since Im running 20 lbs of boost it should go to 63. Sr20det Idle Loop when cold. 9 lambda to 1. I figure it is something like 13% less fuel with the changes. C10cooper @c10cooper. While the engine is cold the (PCM) will remain in “open loop” and keep the fuel mixture rich; to improve idle quality and cold driveability. The bigger the number the richer the jet. When tap on the gas pedal (car is parked in neutral), the a/f ratio goes back to 13 or 14. Based around a light alloy block with alloy heads the twin cam setup uses tried and tested parts and the relatively recent T28 turbo and intercooler made the engine stand out among it’s peers. Step6- now that you've gone this far to adjust idle, it is the same exact procedure to adjust timing and you might as well do this now. Running Lean at idle Posted by TalonEsi_96, Apr 20, 2014. This is located in the same place as the distributor cap on non turbo engines: on the front right of the cam cover, directly above the coolant line. It's reading 1. without any idle adjust, it idles at cold startup around 900rpm thats fine but when the motor starts to get warm it surges between 700-1300rpm thats not right. But after the car gets hot now, the idle Thread by: Urnes_s14_on_ig, Aug 18, Type X 180 - SR20DET Lean under vacuum. Fuel ratio is in the Stoich range during idle, sometimes goes just a touch rich and lean (It moves around a lot, the gauge is connected to the narrowband O2 sensor). Find the appropriate pressure specifications for your vehicle in its repair manual and then compare it to the readings you get when the engine running at an idle, and then at the RPMs specified in the repair manual. Since the O2 sensor simply reads the amount of oxygen in the exhaust stream, it's going to see a nice clean burn at 9. 1990 240sx-swap almost ready to go in:) Location: Flo-City, SC well, been driving my car with my sr20 in my car about a month, and it still wont idle right. Share Followers 0. 040 over. Tom, I'm surprised that I could lean the mixture that much and not get into a "too lean" condition. changed fuelpump from oem to walbro. . We're so close, yet it feels like so far away! Trying to troubleshoot is never easy or fun. rough idle very lean sr20det rough idle very lean sr20det. This seems to be the only way to drop idle without adjusting CAS. Setting the timing to 15-17 when the idle is too high is like retarding the timing, and vice-versa. It has that mmmmmmBLURPmmmmmmmmmmBLURP tone. When I purchased the car it ran fine, the day after it developed a lean condition (17-20 afr at lean and throttle). It mainly happens because of idle air control valve, or your fuel might be of low-quality. 71%. SR22 Turbo - Set the fuel flow to 17-17. You Is this normal for idle? Normal for 1500rpm? I was able to get it to fluctuate Lean Rich once I stepped on the throttle. S13 SR20 Lean Idle [Help] Close. 7-14. rough idle while in neutral jumps between 1400 rpm and drops to almost stall, then when i take off there is noticeable lag and engine stops at 5200 rpm like there is a rev limiter For engines equipped with controllable pitch propellers, lean until a slight increase of airspeed is noted. 1. Do not apply force to the float, just let it rest on its own weight. The (PCM) may ignore the oxygen sensor (O2) rich/lean feedback signal; until the coolant reaches a certain temperature. You should be at 15 BTDC, or second to last mark on the right hand side of the pulley when you're looking at the crank pulley. By jessejames, August 10, 2013 in Nissan 4 Cyl Forum. I did my nct last week and failed on CO on high idle. Then suddenly it will lean out and barely idle at 22 afr. And while it was sitting there running, the voltage never suddenly dropped (which, if it was connected to the ECU, would cause a lean condition). Fuel ratio is in the Stoich range during idle, sometimes goes just a touch rich and lean (It moves around a lot, the gauge is connected to the narrowband O2 sensor). On an engine with sequential injection, this is simple enough – get the engine idling at 14. 7 and turn the K value way down. 835 and rescale mspnp sr20det basemap to 51 percent. The Infinity Series 5 for Nissan SR20DET race engines is even more affordable than its larger Series 7 version because it is designed for smaller racing engines using low impedance injectors up to 6 cylinders or race engines driving up to 8 high impedance injectors. I ask because it has 140s for both primary and secondary which makes absolutely no sense when the barrels are different sizes. Wideband shows lean condition. I don't know a great deal about sr20's, but the ca18's have an idle adjustment on their ECU. Car runs lean under boost, 3-4k pulls at between 13. checked and repaired vacuum/boost leaks. Making long story short, during idle the car runs extrmemly lean. Tell me this. Hi all, have an SR20DET with ID 1300x injectors and a rather large Walbro fuel pump, set of mild cams and E-Throttle, I’m not going to tune the car myself, will be using a pro dyno tuner, but I need to sort the idle and if possible lean cruise as I have to bed my clutch in Before any big power runs and also iron out a few small bugs, I have the Link Wide Band lambda and managed to configure I have a fully built SR20det with a P11 head being ran by an AEM V2 Nissan ECU. The computer figures it miscalculated the fuel, so it adds fuel to compensate for the extra air. U67 head, stock cam. My SR20det is showing really lean on my aem uego wide band and will not idle and cannot be held at a specific rpm, only feathering the throttle will keep it running. Idle should be stable between 750-850. Preferably fuel map should be adjusted first and latency must be correct for the injectors) TP maximum: Maximum load limit where on acceleration the table prevents overshoot load (reading too rich). The car was orginally imported from California by the previous dutch owner, so it still has al the emission control systems in place, Catalyst 510Martinez wrote:A VSS is used for more than speedometer input. minimum load (if too lean at idle for example. The (PCM) may ignore the oxygen sensor (O2) rich/lean feedback signal; until the coolant reaches a certain temperature. This table needs to be increased when boost levels are increased (normally done on injector resize S13 SR20 Lean Idle [Help] by damebash in 240sx [–] damebash [ S ] 1 point 2 points 3 points 2 years ago (0 children) This happens with the car not moving at all, the only way the BOV would effect the idle is if it's leaking which it's not The idle adjustment won't affect off idle driving. If I give it some throttle for a block or 2, it seems like it's warming up the 02's & then it reading perfectly at idle again. 7v sounds high to me, my car with Z32 maf runs at 1. The 50 refers to the . sr20det lean idle