RAU03MACH
Legend
im changing my fuel system when i replace the engine im building
If my fuel pressure regulator dosnt fix my issue, then im done / out of shit that could be my issue nglim changing my fuel system when i replace the engine im building
My thing is, its after it’s warmed up then it acts like 2 stepno one ever thinks
but it could be an electronic problem like computer just glitches
I had to tear out my fuel pressure regulator shit was stuck in there. That gave me a little hope ngl. Plus i don't think its actuating properlythats why the good lord gave us hands to tear shit apart and trouble shoot
This is what its doingwell if thats not the problem got to trouble shoot more
fuel or a electrical problem to meThis is what its doing
Fuel pressure when i tested it was ass, O2 seemed good, fuel trims where weirder. STFT was like 99.2% and it wasn’t moving. LTFT i forget but it seemed normal, i might of been the other way aroundPlug a scanner in that can read live data. Take a look at the fuel trims. Are they pegged rich at all? What are your short terms and long terms? Add your STFT and LTFT on bank 1 up. Do the same for bank 2. Are they under 10% each side?
Take a look at the upstream O2's. Are they switching properly? Do they vary between 0.1V and 0.8V up and down in a consistent manner at idle? Do they both switch the same?
Hesitation could be attributed to running rich. I'd plug a fuel pressure tester into the rail and actually verify fuel pressure first before just replacing parts. But, when you say it sounds like a 2-step, that could also be a misfire as well as 2-steps generally cut ignition to achieve that affect.
It was 99% ik that i read that 99.2 or whatever is when its not in use, and its really any rpm. When i get off work im putting in the new fuel pressu Regulator and seeing what happensYou sure it was 99%? I thought they maxed out at 25%. Might want to double check that but I would think the LT would have added fuel as well. If it's dumping fuel on one bank that would certainly give you a hesitation.
If it happens at higher RPM however, i think it might be ignition related. I don't think 1998 has misfire detection like the 99-04 cars do in it's live data stream.
Taking my car up to manassas for it to beYou sure it was 99%? I thought they maxed out at 25%. Might want to double check that but I would think the LT would have added fuel as well. If it's dumping fuel on one bank that would certainly give you a hesitation.
If it happens at higher RPM however, i think it might be ignition related. I don't think 1998 has misfire detection like the 99-04 cars do in it's live data stream.