1985-1998 [Subscribe to Daily Digest] |
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I need to let off some steam, since this is totally driving me crazy!
As in my past posts, I was enjoying powerful boost up until the day I replaced my primary O2 sensor and fuel filter. I did the sensor myself, and had the filter replaced at an indie's shop (another fiasco) within the same weekend.
From that point forward: only 5psi boost attainable, once in awhile 16psi, but then right back to 5psi.
Although I never had the fuel pressure tested, I felt it was sensor-related, and my thoughts were correct since 2 weeks later the CEL came on with the same exact codes as was before (P0130, P0133) that led me to replace the sensor in the first place.
I cleaned the BPC, I purchased another (used, 48K miles on it, working condition), and swapped it in, reset the ECU and did an adaptation run, and none of this helped.
I then put in another O2 sensor (I exchanged the new "bad" one for it), had the codes erased, and still there is only little boost.
Couple of questions here:
1) Is there a way to reset the ECU without disconnecting the battery? I tried pulling the 5 amp fuse (Engine systems and diagnostics), left it out all night long, and I don't think it was reset.
2) Could I have another problem that is causing the P0130/P0133 codes? What else is part of the "O2 sensor circuit"?
3) Is the O2 sensor nearest the turbo considered the primary/Bank 1 sensor 1? Could I be having a problem with the one after the cat? This one has had its wires cut and spliced a year ago since I had to re-locate it when I installed my JT back then. Plus, this one is the top-most connector within the metal holder (does that mean it's "sensor 1"?).
4) Could a faulty O2 sensor cause a low- to no-boost issue?
5) If I had a stock ECU (which I don't, I have a BSR re-mapped one for over a year now), is there any possible way I could attain 16psi, even using 93 octane and a 3" exhaust (Garrett T25 with auto)?
I feel like everything I'm doing is not being recognized by the ECU, making me think now that it might be the other O2 sensor.
PLEASE HELP!!!!!!!!
Joe
'98 70K
posted by 12.111.48...
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