I have an '89 IROC (305 TPI) with a couple idling problems. It's bone
stock except for K&N filter and Flowmaster cat-back. The fuel
pump/filter is new, injectors cleaned recently, just tuned up with
plugs, wires, cap/rotor, timing checked, etc. at local shop. After the
tune up it starts and generally runs better, except I still have a
couple idle problems that've cropped recently (and no check engine
1. Sometimes, but not always... idle seems WAY too high when started
cold and won't back down even after running for some time and warmed
up. This doesn't always happen.
2. When warmed up, in drive and stopped (eg. at stop light) the rpm
starts getting a bit erratic and engine starts missing to the point
where I'm afraid it's going to stall out. It does a very odd
'lurching' that I've never felt in a car before. Putting it in park
helps a bit, but still misses pretty bad.
Thanks in advance.