rerplaced plugs, wire, cap, router, distributor, spider fuel ingector, distrubutor module, air filter, 58-61psi gas pressure, checked vacuum lines as well as possible, replaced gas pressure regulator, still shakes on take off, on idle and cruise is fine. could it be broken cat converter? (seperated pipe) vacuum leak? or timing advance?

 

What was your reasoning for replacing all of those components?

Fuel pressure looks good.

Have you tried the almost free things like cleaning your MAF sensor, your EGR valve, and your throttle body (including removing and cleaning the IAC valve)?

 

i just bought it, had to replace most, the vehicle runs better its just this last problem, should i replace it or just clean it? if so how should i clean the maf?

 

Timing?