OK so the car: 1994 Camaro Z28, Lt1 350, automatic trans. STOCK
problem: Misfire or hesitation
what we've done:
somebody put bosch+2 spark plugs in it, and 3 were cracked. so we put new AC Delco Platinum plugs in it. NEW wires, new starter (housing was broken). Removed AC compressor and replaced with bypass pulley.
It's got a hesitation or a miss at idle and when On the gas. Catalytic converter is making noise (THIS noise is consistent with the miss). Engine shakes when it's missing, as if the timing was off a little bit. OPTI is clean and dry, looks brand new really. Ignition coil and module Tested GOOD.
so what am i missing here? Help! Please! I'm not looking to throw parts in it just because, this is a customer car and she is on a limited budget. I am only looking to replace any parts that are causing the problem. That being said, i do NOT want to hear "Well change the opti, it probably needs it anyways", the opti is NOT the problem, car starts right up as soon as i hit the key. <--i've stated this because everyone is stuck on opti, even though chances are it's not as it's not been wet and doesnt have any dirt or anything on it. looks BRAND NEW to be honest....

 

LT1 was in the 4th gens (1993 - 2002), we are 3rd gens here (1982 - 1992). Although some might have some info on 4th gens here (those few that did LT1 swaps or those that also own 4th gens), your limiting your knowledge base by asking here. For more better response, try posting on a 4th gen board, or maybe www.horsepowerjunkies.com (alot of semi-local (NC) 4th gen owners there).

 

yea i know this site is mostly for 3rd gens, but i also know there's a wealth of good information from many people here. trying to fix this thing and get it out of here, i posted up on a few boards
I'm good on that HPJ stuff they're not ready for the "GreenMachine" to return hehehehe