High stft at idle
WebAug 11, 2024 · The STFT varies between -4 and +6 LTFT is at 14.8% at idle will go to 25-27 at 2000 RPM. Slightly hard to start and diesels a bit at shut off Idles at 900 RPM with or … WebNov 17, 2024 · Even if your STFT's are just a few points positive at idle, it may indicate a leak. Let the car idle and carefully spray short bursts of brake cleaner/carb cleaner around the intake and the blower and see if the engine responds. It would also change your STFT's if you can look at a scan tool while spraying.
High stft at idle
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WebJul 10, 2024 · If the STFT rises higher than plus 15-20% at idle, but drops at higher rpms, most likely you have a vacuum leak. If the STFT is close to zero at idle, but elevates to 15 … WebMay 27, 2024 · STFT eventually follows within seconds of the LTFT to being high readings. This consistently starts when car is under light load. Typically around 5 - 7% throttle. ... Idle, Medium load or WOT I have no issues. It seems to be at very light throttle that will send O2 into flat line .9 volt reading first, with fuel trims to follow a few seconds ...
WebJun 29, 2024 · The LTFT on a cold engine at idle starts at +1.6. As the engine warms to operating temperature the LTFT creeps up to 21.9 at idle. This seems to go up in line with … WebJun 30, 2024 · STFT was at 4% MAF 2.8 warm 3.8 cold changed oil, and replaced homemade CAI with stock air box and replaced in-cabin air filter STFT shot up to 27.3% …
WebAt both idle and 2500 RPM, after engine warm up, the post-cat short fuel trim is hovering about 50%. The post-cat o2 sensor switches with a lot less of a voltage difference than the pre-cat. The STFT pre-cat drops to about 1% at engine warmup. WebJan 9, 2024 · Restriction on fuel filter or fuel ines will cause lean mixture at higher loads and RPM generally not so much at idle. Low fuel pressure from a bad pump usually affects crank time at cold start but less than 0.5 bar (7psi) drop can have a big effect on fuel trims. " We're trying to plug a hole in the universe, what are you doing ?. "
WebJul 3, 2016 · Started seeing what the trims were before messing with the VE. STFT trims were still at +50 , pretty much worked the entire VE and multiplied by 1.20 , trims got better to +18 so I multiplied by another 1.15 and got them to +5 on one bank and 0 on the other. Truck turned on great and idled way better.
WebFuel trim should be checked at idle, 1500 rpm and 2500 rpm. In this case, STFT at idle was approximately 223% and LTFT was 24%, for a total fuel trim calculation of 227%. No matter how long the vehicle idled, LTFT never went above 24%. In this case, STFT carried a greater weight than LTFT. how much is jaylen brown contractWebDec 4, 2013 · A useful diagnostic tool is to determine if the fuel trim problem exists in more than one engine operating range. Fuel trim should be checked at idle, at 1,500 rpm and at 2,500 rpm. In addition to these no-load checks, drive the vehicle at various steady load conditions and watch for fuel trim variation. By Underhood Service Staff Writers how much is jb8 worth in jailbreakWebOct 1, 2024 · At idle I still have high STFT/LTFT, but no codes. After ridding the car for 60 miles, I was pleased to notice that the LTFTs dropped on both banks to 1-3% but STFT are 10-11%. I am afraid that if I will let the car idle for 30-40 min, the LTFT will go higher. how do i add google sheets to my desktopWebWHAT CAUSES HIGH LTFT - Answered by a verified Chevy Mechanic ... If you notice a change in idle, you've found your leak. Be careful not to spray this stuff around ignition components (distributor, wires, coils, etc) as a spark leak can ignite the spray. ... HI BRAD CARLZ 136 RPM 670-710 /ECT 198/IAC 36/BARO PRE 31/ENG LOAD 3 /IPW 4.6-4.7 /LTFT ... how much is jb hi fi deliveryWebJun 15, 2024 · At Idle, short term fuel trim bank 1 is about 10-18%. As I increase throttle to 1500 rpm, then 2500 rpm and higher, short term fuel trims will drop down to ~2 or 3%, … how do i add google translate to my websiteWebDec 24, 2024 · The only issue is at idle the LTFT bank 2 is around 11.7. Bank 1 is 4.8. When going 65 @ 2000 RPM both banks are often exactly the same around 11. STFT works perfect around 0, jumping ± 4. In addition the O2 sensor voltages seem normal jumping around from .2 to .8 volts on both banks… how do i add google play store to my phoneWebAug 24, 2024 · LTFT now ranges between 11% and 20% at idle. It hangs around 10% under revving and 4-7% under load; this has not changed since before the repairs that have been … how do i add gst to a price