How can I adjust the air/fuel ratio???
- Thread starter Caitlmt
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You could also get a Air Adjuster from IST. It Worked WONDERS on my moms 94. I couldnt figure out why it would run so rich, or be jumpy, black pipes the works. Installed the air adjuster and tuned it out... Phew.. Great item for around $170. After you replace all your sensors and the AFR I would check into this if those things dont fix it.
11.2....hot damn that's bad. Like they said use an AFPR and try to get it, ehh, around 13.5 or so I'd say would be a good bet. Just be aware that with fuel pressure, it's easier to tune smaller injectors at higher pressure, than it is larger injectors at lower pressure, provided you're staying within the recommended duty cycle range. If you cant get it GOOD, get it close and you may have to chip the rest out.
FWIW, the injectors will adapt the pulsewidth to reach stoich, or what the puter thinks is stoich.
That was why it was asked when this occurs. If it is at anything but WOT, the AFPR is not going to do much.
That was why it was asked when this occurs. If it is at anything but WOT, the AFPR is not going to do much.
If we knew what mods he has (if anything significant), when it ran rich, etc, that would make this easier. I assume he has no mods other than bolt-ons and is not tossing any codes (you would see the adaptive limit, which is not as small as some might think, in a code).OrLackThereof said:
Were you able to permanently change the part throttle trim with the AFPR? I am with you on the full throttle reasoning (on foxes, not SN95's).
If you are going to turn off the EGR function in the puter, go for it.Caitlmt said:
Now when were you seeing that A/F ratio and how was it measured?
I dont think you are hitting any adaptive limit with those 24's.
What MAF are you running?HISSIN50 said:
Im just going on my personal experience, running 24 lb injectors and an AFPR, as far as driveability goes, I found virtually no adaptation taking place on my car other than wide open...if the pressure is high, it surges, always, every time, and always stinks rich and fouls plugs. If it's lean, it misses and bucks, always, and never seems to adapt or add more fuel. I don't know if its just my car, but I've had to dial in my pressure to within 1 to 2 psi to get the car to act properly, so far as Ive been able to tell there's no adaptation taking place EXCEPT the computer's learning at wide open throttle, where it always backfires on shifts after changing something during the first pull. Maybe my car's just possessed, couldn't tell you
I think those numbers are really low, for (even though they are e7 heads) stock p/p'd heads, cams and a cobra intake.
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