1994 Jeep cherokee rough idle
05-26-2011, 01:15 PM
#1
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Year: 1994
Model: Cherokee
Engine: inline 6
1994 Jeep cherokee rough idle
I got a 1994 jeep cherokee that is idling really rough, sounds like its mis firing, and back firing.
i change the
distributor
distrubutor cap
spark plugs
spark plug wires
camshaft sensor
crankshaft sensor
fuel presure regulator
theromstat
do you guys have any idea?????
i change the
distributor
distrubutor cap
spark plugs
spark plug wires
camshaft sensor
crankshaft sensor
fuel presure regulator
theromstat
do you guys have any idea?????
05-27-2011, 06:37 PM
#2
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Location: South Jersey
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Year: 2001
Model: Cherokee (XJ)
Engine: 4.0L I6 Power Tech
Is/was the check engine light on?
Have you checked for any engine fault codes?
http://jeep-xj.info/HowtoECUcodes.htm
Have you checked for any engine fault codes?
http://jeep-xj.info/HowtoECUcodes.htm
05-28-2011, 05:35 AM
#7
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Year: 1999
Model: Cherokee
Engine: 4.0
Backfiring generally indicates a fuel/air imbalance. Backfiring in the intake is usually a "lean" condition. Backfiring out of the exhaust is usually a "rich" condition.
Job #1 is to check comprehensively for a vacuum leak. Can be under the hood or in your exhaust system.
If no vacuum leaks found, get a fuel pressure gauge and install it on the schrader valve on your fuel rail. This gauge can be rented from some big box parts stores. Compare your readings to factory spec. Without verifying your actual pressure with a gauge, you are just "guessing" on fuel delivery.
Use this technique to check for any soft/stored codes in the computer.
http://www.go.jeep-xj.info/HowtoECUcodes.htm
Job #1 is to check comprehensively for a vacuum leak. Can be under the hood or in your exhaust system.
If no vacuum leaks found, get a fuel pressure gauge and install it on the schrader valve on your fuel rail. This gauge can be rented from some big box parts stores. Compare your readings to factory spec. Without verifying your actual pressure with a gauge, you are just "guessing" on fuel delivery.
Use this technique to check for any soft/stored codes in the computer.
http://www.go.jeep-xj.info/HowtoECUcodes.htm
Last edited by tjwalker; 05-28-2011 at 05:38 AM.
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05-31-2011, 03:22 PM
#9
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Year: 1994
Model: Cherokee
Engine: inline 6
got it all ready to go just got a couple of other litte things.
speedometer,gas gauge and temp. gauge arnt reading either.. any thoughts on that??
speedometer,gas gauge and temp. gauge arnt reading either.. any thoughts on that??
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