SPONSORED LINKS

1999 Pontiac Grand Am Engine misses bad

Tiny
KADESH
  • MEMBER
  • 1999 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 155,000 MILES
I have a bad miss in engine. I have changed sparkplugs, ignition module, coils, the plastic housing and plastic things that go over plugs, fuel filter, fuel injector, checked compression which is ok. Had the catalytic coverter checked ok. If you hold gas paddle down half way the engine will rev up and down but still misses bad. Any suggestions. Thanks.
SPONSORED LINKS
Saturday, March 6th, 2010 AT 1:33 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Is the check engine light on when this is happening. It is possible that a coil control circuit, injector control circuit, or fuel contaminants could be at fault, to name a few. If the check engine light is on, it may have a corresponding code that could lead us further in the right direction.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Monday, March 8th, 2010 AT 11:15 AM

Please login or register to post a reply.

Related Engine Misfire Content

Intermittent Misfire
VIDEO
Intermittent Misfire
Instructional repair video
Misfire Random Code P0300
GUIDE
Misfire Random Code P0300
The world of automotive diagnostics can be complex, with numerous codes and potential issues to keep track of. One of the more common engine diagnostic codes is P0300, which...
VIEW MORE

Sponsored links