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1999 Dodge Intrepid mISFIRING

Tiny
JBFLETCH2
  • MEMBER
  • 1999 DODGE INTREPID
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 151,000 MILES
When I crank up my car, it starts misfiring if I turn on the rear window defrost it doesnt do quite as bad. The tachometer is all over the place up and down. Could it be the MAP sensor or knock sensor or what. Can someone help me please.
Thursday, October 28th, 2010 AT 6:58 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine running rough or misfiring can be cause by the following:

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.
10. Throttle position sensor.
11. Manifold absolute pressure sensor
12. Idle air control motor
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Thursday, October 28th, 2010 AT 7:17 PM
Tiny
JBFLETCH2
  • MEMBER
  • 2 POSTS
I changed all coils, plugs TPS, IAC, Crank sensor, cam sensor, oxygen sensors, pcv, i'm stumped. Please help me.
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Thursday, October 28th, 2010 AT 7:24 PM

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