Quote:
Originally Posted by Schurkey
No substitute for a proper scan tool. You (or someone else) could look at the data stream to verify that the fuel, timing, sensor inputs, etc. are all OK. Just because the IAC was replaced, does not mean the wiring to it is in suitable condition.
You did not mention that you disconnected the wire as specified in the instructions when setting the timing. Did you?
Don't forget the "other" converter--if the torque converter fails, (one-way clutch for the stator slips) then low-speed acceleration will be terrible, although high-speed could be unaffected.
"I" would fix ALL engine and exhaust issues first. If the problem remains, consider the torque converter.
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When checking timing I did disconnect the advance wire as you're supposed to yes....the kicker is though after hooking the wire back up my timing didn't advance at all, what could cause this? Bad ecm? As far as wiring on the IAC I looked it over pretty good and it seems to be in good shape. I did give some thought about it being the torque converter but the fluid neither smells or looks burnt and there are no " black specs" or metal in it (or indicators of burnt up clutch/bands) I can't rule out it being the torque converter for sure but I don't think that's my issue.
So far here is what I found/did: removed the oxygen sensor before the cat and drove it around made no difference in driveability or acceleration, so I don't think my exhaust is plugged. I did find out the actuator for the front differential was malfunctioning and the front diff was locked in 4x4 all the time(that issue is corrected now.) Next while test driving it this weekend it almost died on me. I drove it around for about 20 min and then pulled back into the driveway and put it in park. Rpms were really low like 500, and it sputtered and dieseled but didn't die, rpms jumped back up a little on its own and then it repeated the process over and over. No codes came on during this time, and my oil pressure always stayed in an acceptable range. So not really sure what caused that or why.
I think the next thing ima do is see about borrowing my buddies scan tool and go from there. I also plan on rebuilding the TBI and HEI system in the very near future. I'll track down this issue one way or another.