| Hey guys, I come to you in need of your wisdom. I have a 90' 2+2 stock except I/H/E and egr/ line deletes I bought this car a few months ago and have been tinkering with it to get it to run right. I just did the ECU diagnostic and the codes came back fine, but the o2 codes came back lean (No light). I tried several times to verify. Now, the car doesn't idle high when cold, despite having the AICV assembly replaced. It will however, pop and spudder, and even sound like a whole side of the motor isn't running at about 2-2.5k rpm normal driving. If I get on the throttle while this is happening, it goes away instantly. Same thing in every gear until operating temp. I found a small vacumm leak today and it seems to have helped some of the hesitation I also have, but not all of it. If I unplug the AICV or try to adjust the screw, it does absolutely nothing different. Car runs great at WOT, really great actually. But the lean codes have me concerned. Injectors have been replaced, throttle bodies and all connections have been cleaned. Also, if I unplug the o2 sensors, nothing happens, is this normal? Sorry for the book I just wrote. Any ideas?
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