SPONSORED LINKS

1993 Pontiac Grand Prix misfire

Tiny
CONFUSED!!!
  • MEMBER
  • 1993 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 215,000 MILES
Ok here we go. My car dont go over 35 without a bad misfire then a backfire and then it dies! I have replaced the following item with no improvement. Fuel pump, fuel filter, plugs, plug wires, all exhaust parts, map sensor. Throttle position sensor, iddle air control valve, I have checked the timing, and finally the engine control computer. What else should I check and replace?
SPONSORED LINKS
Thursday, April 1st, 2010 AT 6:03 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
1. Defective spark plug.
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, April 1st, 2010 AT 6:44 PM

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