1999 Pontiac Grand Prix Pressure Build up

Tiny
BRONCOBEAST12
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 112,000 MILES
Hi, I just put a used motor in my grand prix. It came out of a 97. When I started it up it ran like crap, with smoke blowing everywhere and the check engine light flashing, There is a lot of pressure built up in it because when I take dipstick out I hear a high pitch wistle, and when I take the oil cap off it completly shuts off. I replaced the PCV valve and doesn't do anything. I took it to a shop and they had no clue what was wrong. They told me for starters they would replace the lower intake and the upper plennum. Will that fix the problem?
Tuesday, September 14th, 2010 AT 8:38 AM

1 Reply

Tiny
ERNEST CLARK
  • MECHANIC
  • 1,730 POSTS
There's too many things wrong with that engine to bother spending money on it.

Besides, these engines are cheap. You'll be better off finding another one. But this time, have the engine compression tested and make sure all the sensors and wires are in working order.

Deal with someone you trust.
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Wednesday, September 15th, 2010 AT 6:25 AM

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