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1997 Pontiac Grand Prix mis fire

Tiny
STEVE MATUSXEWSKI
  • MEMBER
  • 1997 PONTIAC GRAND PRIX
  • 3.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
I have changed plugs wires one coil and the module, but it continues to skip under load ! On hills mianly
Friday, August 8th, 2014 AT 10:44 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and check fuel pressure with a gauge auto parts rent it
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Friday, August 8th, 2014 AT 12:45 PM
Tiny
STEVE MATUSXEWSKI
  • MEMBER
  • 2 POSTS
I have checked for codes ! Sais mis fire, no other codes found, if preasure aint right would it skip? And why would it run sweet one minute and the next it goes to skipping? Fuel filter pluged?
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Friday, August 8th, 2014 AT 1:18 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Misfires are very hard to diagnose and shold be left for the pros as it's not easy for them as well. Check for a vacuum leak and check compression. It may be a sensor going bad that is not sending correct voltage causing it.
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Saturday, August 9th, 2014 AT 6:02 AM

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