When I set my Timing to specs my car runs really rough. And when I set it by ear its not even near the marks. What could cause this distibutor,timing chain???? Also my car likes to rev high before shifts then when it does shift it squells the tires a little. Any suggestions would help.

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1985 Camaro Iroc Z
305 Tuned Port Injected

Planning for a 350 swap soon!!!

 

Hello, did you disconnect the timing connector(tan/black) on the pass. side firewall when setting the timing? best of luck, tom

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86 iroc 305tpi auto. mild cam

 

Yes I disconnected that wire does anyone know how to tell if computer went bad or how to tell if your in limp home mode?

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1985 Camaro Iroc Z
305 Tuned Port Injected

Planning for a 350 swap soon!!!

 

Your marks on the balancer may be off. Try setting it by ear, but don't go too far. It would help if you had a scanner to see if you're getting knock counts.