Hello i have been working on the engine problem for 4 weeks now.it has an exhaust leak on passenger side manifold at the gasket.i have ordered 2 new ones.the throttle seems to stick some but eventually drops to 900 1000 rpm.
but sounds like it is missing.did compression ck dry all cylinders 135 psi.borrowed an injector test set inputs all good and injector test set showed all injectors good.maf sensor showed bad bought a remanu from autozone .put it on no difference.no vacuum at egr valve.but good vac at all other points.
ecm good.iac good new distributor cap and rotor.don't know what else to check.any help would be appreciated.starting to get frustrated.
butchie49

Problem solved.lower plenum had about 1 inch of gasket torn.thank you all for your responses.butchie49

 

Have you checked everywhere for any vaccum leaks? Could be your egr valve is leaking. Hows your air filter? Are you getting suffcient fuel to the injecters?? You changed the dizzy cap and rotor but what about the plugs and wires??