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OK, for those of you who don't want to read through the whole post to figure out where I'm at on this problem (i dont blame you), here it the current status of the car....
Problem-
-At idle, car searches between 700-900 and misfires randomly (sometimes it misses every 2-3 seconds, and sometimes its a constant miss which happens every second). the air/fuel ratio fluctuates from 13.9 to 15.0 and everything in between.
-At idle, when you unplug the o2, the car stops missing, but still searches. air/fuel ratio is around 10.6 to 11.5.
-When you hold the rpms at a set point (ex. 4000 rpms) it will miss around every 2-3 seconds. (car still seems to search, but im not positive)
Solution-
Here is what I haven't done-
-Replace wiring harness (i pulled the thing apart and checked it)
-Replace the o2
-Replace the IACV
Solution-
Here is what i have done-
-cleaned the IACV
-replaced the CAS
-replaced TPS (bad)
-replaced MAF (bad)
-replaced injectors (370's)
-replaced ecu
-replaced coolant temp sensor
-replaced spark plugs (ngk iridium)
-replaced fuel pump (walbro)
-replaced injectors (440's)
-checked for boost leaks
-Checked codes (only 55 [all good])
-checked for vacuum leaks
-checked wiring harness (pulled apart, looked good, but did not replace)
-checked vacuum hoses (correct hookup locations)
-checked timing
-checked grounds
-checked alternator
-checked fuel pressure regulator (40 psi @ idle)
-checked timing chain (just top two timing marks, not bottom)
-checked power and grounds on ecu plug
-checked Greedy Bov (closed all the way)
-checked turbo (for runout/ missing teeth)
-checked compression (150psi x4)
-re-checked ecu (good)
-re-checked maf (good)
-checked coil packs
-checked coil pack harness
-checked ignitor
-checked to make sure all cylinders are firing (yes)
-checked to make sure all cylinders getting fuel (yes)
-installed and tuned Apex-i Power FC L-jetro
-installed Power FC D-Jetro (no more maf)
If you had a problem that was similar to mine or you think you know whats wrong with my car, please discredit anything i have checked/done, i could have missed something.
Any advice is appreciated
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