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GM Tech (Cam)
GM Tech (Cam), Pontiac Technician
Category: Pontiac
Satisfied Customers: 2377
Experience:  GM Grand Master Technician 2007. 14 years experience.
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1993 Pontiac grand prix 3.1. The Engine started running

Customer Question

1993 Pontiac grand prix 3.1. The Engine started running rough and would only stay running with my foot on the gas pedal. Code 33 keeps coming up. I did some reading and I changed the MAP, IAC sensors also gas filter.The engine now runs but it has trouble at idle as if it wants to stall out?
Submitted: 4 months ago.
Category: Pontiac
Expert:  Eric replied 4 months ago.

HI,

Ok, have you checked for air intake, intake manifold gasket, throttle body gasket, vacuum and pcv valve leaks?