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2000 Pontiac Grand Am idle

Tiny
SQUAREBUSH
  • MEMBER
  • 2000 PONTIAC GRAND AM
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
While at idle, every 15-20 seconds the engine will miss just for a second. Noticeable also on Rpm guage with about a 50 rpm drop. No codes. Plugs are good. Ideas?
Saturday, August 8th, 2009 AT 10:03 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
The list of possibilities is long.

Start with measuring fuel pressure with a mechanical gauge, then spark at each plug.

It is apparently not missing enough to set a code, but have PCM scanned there may be pending codes.
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Sunday, August 9th, 2009 AT 8:47 AM

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