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2000 Pontiac Grand Prix air conditioner, rough engine

Tiny
MANCINI
  • MEMBER
  • 2000 PONTIAC GRAND PRIX
  • 185,000 MILES
I bought the car used, first 2 weeks it ran great. After that, about 8 months ago, the engine started to run very rough and burn a lot of fuel. Revving randomly and shakidng the whole car when idling (from the engine) it sounds loud and changes gears with a bit of pull.
Also the belt on which generates my air conditioner (as well as water pump, generaror, etc) the round gear no longer spins and makes an awful squeek- the round disc may sometimes spin, but not cosistantly. It would maybe make 1 full rotation every 2-3 second. The belt just spins around it while it remains stationary which in turn raises my rpm unnecesarilly
Need help!
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Monday, July 15th, 2013 AT 8:21 AM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Does the accessory belt have enough tension on it, engine off? If you can easily turn a pulley by hand without moving the belt, not enough tension. Maybe you need a new belt and or tensioner?

Check to see if any pulleys are frozen, engine off, belt off, move by hand. You should be able to move all except crankshaft pulley.
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Monday, July 15th, 2013 AT 1:35 PM

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