hey guys i could really use some help before my dad dumps more uneeded money into his car ....its a 86 iroc 305 tpi auto the problem is it is stumbling under acceleration and hesitates when you rev up ..we have changed throttle positioning senser and brand new maf senser next step is going to be a tune up (plugs wires cap rotor) but is there anything else that could be killing us..PLEASE HELP! thanks guys

 

pull the ign control module out of the dist. and have it tested at autozone. if it fails, you found your prob.

 

tyvm i will try in morning...sounds very possible

 

Hey, This is slowmaro's dad. I changed ign module w/new new cap, rotor, wires and E3 plugs. Still have stumble/hesitation problem. I'm at the frustration level now. Any further help would be great! Thanks

 

Have you ohm checked your injectors I was having the same problems and 3 of my injectors were weak and 2 were totally bad.

I did all the same things cap, rotor, wires, ignition module, spark plugs and it still ran the same new injectors fixed it all.

 

Check your timing recently? Some more info on what's been done recently would help, and when/why this problem started in the first place. You can throw parts at it all day, might be something simple like a ground, I'd check all the bases first before buying anything else.