High stft at idle
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 … 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 …
High stft at idle
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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 … http://www.boosttown.com/electrical_system/stlt_fueltrim.php
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. WebDec 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
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 … 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.
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.
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 ... curate somethingWebJun 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) curate summer shift dressWebJan 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. curate street great harwoodWebAt 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. curate take outWebJun 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 … curate the firm spokane waWebAug 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 … curatest vliesstoff testpflasterWebNov 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 … curate the firm spokane