I've got a 1985 Fiero 2m4 that runs nice and smooth at idle and up to 2000 rpm or so but then when you hit the throttle it hesitates and jerks but then at higher rpms seems to smooth out again. I'm new to this forum but was wondering if someone could help me begin the search for the problem.
When I'm at about 2500 rpm that tach just bounces all over the place (goes nuts)

[This message has been edited by chrislayton (edited 10-28-2014).]

It's looking more like the engine has a miss all the time but becomes more apparent during acceleration.

Welcome to the Forum!

Get a spray bottle with water and wait until dark. With the engine running, mist the spark plug wires and look for arcing. If that is OK, do a test on the ignition coil.

Try First, Disconnect tack filter.
See my Cave, HE Ignition

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quote Originally posted by theogre: Try First, Disconnect tack filter. See my Cave, HE Ignition

What's the tack filter look like or where is it found?

https://www.fiero.nl/forum/A...000604-2-001435.html