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1999 Pontiac Grand Am looses power

Tiny
MJOHNSON67
  • MEMBER
  • 1999 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
My car looses power when it struggles and when going up steep hills. I live in a rezervation so all roads are not paved my car has to deal with the mud so when it goes thru mud I have to Gas it or ram it but still losses power.
Friday, January 29th, 2010 AT 7:40 AM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
First thing to test is fuel pressure with mechanical gauge. Pressure should be at least 40-45psi with key on and engine not running, pressure should hold for a minute or so.

The 99 with the 3400 SFI engine had known problems with going through coil packs and plug wires.
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Saturday, January 30th, 2010 AT 8:44 AM

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