OK, so we got everything installed and fired up. Initial fire went great, everything where it should be.
Until the first drive. It runs well enough, until I get this popping sound, the IAC reading spikes to 50-70%, and it sounds like a massive vacuum leak. If I shut the car down, it will sometimes restart easily and idle correctly. If I pull the air cleaner and put my finger over the IAC hole, the idle comes down. The IAC is definitely the issue, I would think. All the other parameters on the handheld are within spec. After couple more quick drives (that's all I can get it to stay running now), the same thing will happen, except now it will die and is difficult to restart. It will blow black smoke when it does restart. It will stay running in gear so long as my foot is on the throttle. When I take my foot off to stop, it dies again. The IAC reading is always above 50% when it's acting up.
Let it cool down, decided to rerun the initial setup wizard. Got everything dialed. IAC reading 6% at hot idle, TPS reading 0%. Idling like a champ. Took it around the block. Stalled twice while stopped in gear. Fired right back up. Ran OK, but had a couple minor IAC spikes (rush of air, handheld reading goes up) that showed on the handheld, but it would settle right down. Brought it home, let it idle some more, everything looking good. Decide to head up the road a little, and it all went to hell. Backfiring through the exhaust, cutting out, handheld going crazy, IAC reading zero at idle in park, have to pump it to keep it running, then it all clears right up for a minute, then goes back to running like hell. Was able to limp it home. Put it in park, idling perfectly. I guess I should try some datalogging, but I'm so angry right now, I think it's best I let it sit for a while.
Until the first drive. It runs well enough, until I get this popping sound, the IAC reading spikes to 50-70%, and it sounds like a massive vacuum leak. If I shut the car down, it will sometimes restart easily and idle correctly. If I pull the air cleaner and put my finger over the IAC hole, the idle comes down. The IAC is definitely the issue, I would think. All the other parameters on the handheld are within spec. After couple more quick drives (that's all I can get it to stay running now), the same thing will happen, except now it will die and is difficult to restart. It will blow black smoke when it does restart. It will stay running in gear so long as my foot is on the throttle. When I take my foot off to stop, it dies again. The IAC reading is always above 50% when it's acting up.
Let it cool down, decided to rerun the initial setup wizard. Got everything dialed. IAC reading 6% at hot idle, TPS reading 0%. Idling like a champ. Took it around the block. Stalled twice while stopped in gear. Fired right back up. Ran OK, but had a couple minor IAC spikes (rush of air, handheld reading goes up) that showed on the handheld, but it would settle right down. Brought it home, let it idle some more, everything looking good. Decide to head up the road a little, and it all went to hell. Backfiring through the exhaust, cutting out, handheld going crazy, IAC reading zero at idle in park, have to pump it to keep it running, then it all clears right up for a minute, then goes back to running like hell. Was able to limp it home. Put it in park, idling perfectly. I guess I should try some datalogging, but I'm so angry right now, I think it's best I let it sit for a while.
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