High stft at idle

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August undefined, 2024

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% … WebAug 25, 2024 · If FTs are high then it is running lean (system is adding fuel) - too much air (vac leak) or not enough fuel (low RFP). To me high idle would certainly indicate the …

High bank 1 STFT under load - ScannerDanner Forum

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 ... WebApr 30, 2024 · High STFT are usually caused by a vacuum leak or a bad MAF. Did you use a AC Delco Genuine GM MAF on the replacement one? Aftermarket ones are not reliable. … bristol airways holidays

WHAT CAUSES HIGH LTFT - JustAnswer

WebJan 26, 2024 · If there’s a malfunction in the fuel system, the levels of fuel entering the engine can be too high or too low, which would cause a rich or lean scenario. Oxygen … WebDec 18, 2016 · Load at idle is irrelavent. Except if it's to low when you start the car it will not switch into idle strategy. It'll fire up and idle over 1000 RPMs and it'll be stuck in spark … 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 15-20% at higher rpms, the problem could be caused a faulty mass air flow sensor, clogged catalytic converter or low fuel pressure (bad fuel pump). bristol alternative news

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SOLVED! - Higher LTFT at idle and higher at rpms

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 … WebOct 12, 2024 · While on idle, OBD2 continuously read STFT (short term fuel trim) high at 10 to 30%, again with similar numbers for both banks. After 5 minutes of idling, the engine … bristol air quality monitoringWebJun 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% and LTFT hangs out around 30% immediately after doing above maintenance. Noticed huge hole in upper air boot (I probably made it bigger, when replacing CAI with Stock) bristol all you can eat

"WebOct 10, 2024 · Both idle condition and open throttle condition, O2 sensor reports normal conditions. When returning to idle from an open throttle condition, LTFT stays -20% and … " - High stft at idle

High stft at idle

High STFT/LTFT and P0174, P0170, P16A7 - BimmerFest BMW Forum

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. WebJan 5, 2024 · Only to return the next morning with +25 LTFT +0 STFT Ran the tank down to about 1 gallon. Topped off with 91 non oxy again and fuel trims in 6th at 60 dropped to +10. Idle was still +25 ltft and misfire is present. Not sure where else to look here. Fuel pressure on the high and low side looks good.

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WebSep 19, 2012 · STFT at idle going to +50%. I've been trying to get my tune worked out for the past 4 days, and I am close to the point of just blowing my car up because it's pissing me …

WebAug 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 … WebA significant increase in STFT and LTFT can be caused by: Unmeasured air is entering the engine due to a vacuum leak (higher fuel trim at idle, but less at higher RPMs) Incorrectly reporting sensors (dirty MAF reporting less airflow) Dirty or blocked fuel injectors Rich Fuel Trim - High Fuel Adjustment

WebFeb 6, 2024 · Since the long-term fuel trim seems to go high at idle, a vacuum leak is the thing I would suspect. ... As soon as you hit the leak the STFT will go negative and in a hurry. Then replace what you find is wrong. Share. Improve this answer. Follow answered Feb 5, 2024 at 20:38. vini_i vini_i. 16k 1 1 gold badge 38 38 silver badges 59 59 bronze ... 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 …

WebDec 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…

WebJun 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%, … bristol aluminum window \\u0026 siding bristol riWebDec 20, 2024 · High STFT At Idle. Hey Guys, Having some issues with my tune right now and after a few revisions with my tuner the fuel trims at idle are still pretty high (15-20%). Looking for suggestions. FBM turbo kit. I have looked over all the intake piping and cannot find a leak. Manifold pressure at idle is around 0.32 bar, vacuum at idle is -19 mm/Hg ... can you swim in the sea of galileeWebApr 4, 2024 · I checked the STFT's at idle with the foot off the brake and they appeared to be normal. When I pressed on the brakes, the STFT's went up, and if I pumped the brakes, the … can you swim in the swan riverWebThe fuel trim values will be high at idle and would clean up in higher operating ranges. It’s possible to see slightly elevated fuel trim values at higher operating ranges on MAF sensor-equipped vehicles, but this would … can you swim in the venice canalsWebJul 21, 2024 · If so, it automatically provides 5% more fuel (or whatever LTFT adjustment is stored). When reading a scan tool, LTFT won’t change as rapidly as STFT at or near idle. However, if you drive with the scan tool … bristol ambulance feeder roadWebJan 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 ?. " can you swim in the thames riverWebNov 22, 2015 · Basically, the O2 stays pegged to zero volts at idle, yet both LTFT and STFT are also zero. Strange, if the sensor is reading that lean, then the STFT should be way up! ... Emissions Problem: Lambda AND CO Slightly High on my 98 Mazda 626. 4. Should the EGR be activated at idle? 8. bristol all you can eat buffet