it's trying to hit a 600 rpm target and can't get lower than ~700, that's why it's hitting zero.I was wondering what other than a leak will cause IAC counts to go to 0?
other than a vacuum leak, throttle plates that are too far open will do it.
your idle target is pretty low, though, and it seems to think it's in gear, is the transmission actually connected and providing load, or is it just a flywheel?
it might just be trying to hit an in-gear idle target and not being able to go that low without that load.
yeah it does, the IAC is feeding the idle passages in the plenum, you want all your air going through those passages, and pretty much none through your throttle plates, you should never see zero counts on an LT1And, does it matter?
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