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1995 Pontiac Grand Am Engine vibration

Tiny
REVSHAWN
  • MEMBER
  • 1995 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 195,000 MILES
The car has a vibration when I get to speed on the freeway and try to hold it at that speed. Even when I set cruise control. It also has rough idle. Things I have replaced are: fuel pump, fuel relay, fuel pressure regulator valve, plugs and wires. I have no idea why it is shaking only when trying to maintain speed, not while speeding up or slowing down.
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Friday, March 27th, 2009 AT 1:24 AM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
A bad alignment can cause a vibration, from mild to severe. Also check motor mounts.

Remove and clean the IAC (idle air control valve) also remove and clean the EGR valve, pintle and base.
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Friday, March 27th, 2009 AT 7:38 AM

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