Error Code PO302 Cylinder - 1-10 Misfire Detected
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Member
Joined: Jun 2017
Posts: 107
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
Error Code PO302 Cylinder - 1-10 Misfire Detected
Have to clear messages for MD Emissions:
I recently changed the plugs and cables (like 1 month ago).
Any advice?
I recently changed the plugs and cables (like 1 month ago).
Any advice?
CF Veteran
Joined: Nov 2010
Posts: 5,841
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Year/engine needed for accurate replies. There are significant differences through the years...
Post all codes in one reply, separate threads are not necessary.
Post all codes in one reply, separate threads are not necessary.
Last edited by tjwalker; Jul 24, 2017 at 06:48 PM.
Senior Member
Joined: Oct 2012
Posts: 797
Likes: 1
From: Jacksonville, FL
Year: 2000
Model: Cherokee (XJ)
Engine: 4.0L
P0302 - Cylinder 2 Misfire
- No Spark on Cylinder 2
Spark Plug Fouled
Spark Plug gap too high
Spark Plug Wire resistance too high
-Fuel Issue On Cylinder 2
Fuel Injector clogged
Fuel Injector Wiring issue
Fuel Injector flooding
-Cylinder Compression Issue
Valve issue
Worn Rings
Blown Head Gasket (Most likely would be on 1 or 3 as well)
Time to test for fuel, air, and spark. Then test compression and if it's below 130-150 test cylinder leak down.
- No Spark on Cylinder 2
Spark Plug Fouled
Spark Plug gap too high
Spark Plug Wire resistance too high
-Fuel Issue On Cylinder 2
Fuel Injector clogged
Fuel Injector Wiring issue
Fuel Injector flooding
-Cylinder Compression Issue
Valve issue
Worn Rings
Blown Head Gasket (Most likely would be on 1 or 3 as well)
Time to test for fuel, air, and spark. Then test compression and if it's below 130-150 test cylinder leak down.
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