Question about 2002 Pontiac Grand Prix

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I have an emission part on top of intake plenum, it has CAN cast into the plastic, what is this? It is broken causing a vacuum leak and misfire.

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  • William Arms
    William Arms Oct 08, 2009

    Thanks....I was rushing when I posted last. I have a 2002 Pontiac Grand Prix with a 3.1L auto trans. I have found out the part that is broken is called the evap control valve. I replaced it and still have a misfire, although not random anymore. Changed all 6 plugs and wires, and while in the midst of replacing the intake manifold gasket to seal a water leak I replaced 2 push rods. The push rods developed a noise the same day I was going to do the gasket so I killed 2 birds with one stone, or so I thought. I don't have my scanner and guess I will have to bite the bullet and take it to have it diagnosed....hope I won't need an engine Hummmmm

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  • Pontiac Master
  • 3,640 Answers

If you have the 2.5, then it is the crankcase vent valve (pcv). if its a quad-4 engine then it is the canister purge control valve.

Posted on Oct 08, 2009

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