It run rough

1998 JEEP GRAND CHEROKEE
170,000 MILES
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PIETZ189
  • MEMBER
  • 6 POSTS
I have replaced the fuel pump and the trottle position sensor and it runs fine sum days other days it shuts off when i try to stop and or spits and spuders to try and stay running and i did a fuel filter to it too.and a tune up it has no codes to go off of it a 5.9 and sum times it smells like gas but if i rev it up real good it runs fine after words.and at iedle it runs rough sum time too or will die.
Oct 12, 2011 at 10:15 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Do you have a check engine light and when was last tune-up??

Engine running rough or misfiring can be cause by the following:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs
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.Mass Airflow Sensor
13.Idle air control valve

Note: If it doesn't apply disregard it-
Oct 12, 2011 at 10:23 PM
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