I've got a 1995 GMC Yukon that is shuddering on idle and acceleration. We have changed the catalytic converter, switched out spark plugs, checked the plug wires, changed the fuel filter, PVC, air filter, and ran through fuel injector cleaner through it. It's still doing it. Any suggestions would be appreciated
Answers & Comments
Have you checked fuel pressure ? Distributor cap and rotor ?
Is the check engine light on ?