High stft at idle

Author: pjie

August undefined, 2024

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 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…

Load % too high at idle.... SVTPerformance.com

WebApr 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 … WebWHAT 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 ... the painful visit

Rough Idle/Stall at Idle - High STFT at Idle - Focus Fanatics Forum

WebJan 5, 2024 · Since I did this, my ltfts after the initial warming up are 20%ish. They continue to stay that way unless under load which then drop to 5-8%. Oddly, my stfts after warming … 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 ... http://www.boosttown.com/electrical_system/stlt_fueltrim.php the pain gap book

LTFT (Long Term Fuel Trim) too high - What to check?

Help on diagnosing positive Long term fuel trim

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 … WebJul 3, 2016 · Injectors were ordered from ebay part number 25317628 . I'm thinking they may be questionable as far as the flow rate and stock data not matching to them, the truck … the pain gap rayne fisher-quannWebSep 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 … the pain gap anushay hossain

"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 stft at idle

High stft at idle

High LTFT at idle, no vac leak Bob Is The Oil Guy

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 6, 2024 · Since the intake plenum vacuum pressure is highest at idle, it should also show in the numbers but all 4 fuel trim values are well below +-10% at idle. Yesterday, I got a P2195 code for bank 1 after an engine flush and oil change and some driving, after a 20 minute stop w engine off.

Did you know?

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. WebNov 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.

WebOct 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.

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). 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

WebJun 15, 2024 · From a cold start without touching the gas, as soon as the O2 sensors start reading, the STFT start pulling fuel and adding to the negative LTFT until they get to around -18%. Each time the STFT hits the most negative point, it will reset to 0 causing a bit of idle surge, before going negative, then resetting back to 0, it continues to loop ...

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% 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) the pain goes on nighstalker lyricsWebOct 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 … the pain gait theoryWebJul 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. the pain gapWebJul 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 … the pain-giver ringwraith wikiWebAug 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 … the pain gauntletWebJun 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%, … shutter as a verbWebDec 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 ... the pain gap pdf