Join Date: Mar 2002
Location: Austin, TX, USA
What about plugs, cap, rotor, and wires? If they aren't brand new, I'd recommend replacing them -- basic engine tune up stuff.
Is it a MAP or MAF system? In ether case the MAP / MAF sensor could be bad. But if you get a decent service manual, there should be troubleshooting procedures for sensors. It's a good idea to follow them, because those can be expensive parts to throw at a problem.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI