stock 01 Cherokee Sport 4.0 inline 6 303 code
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Year: 2001
Model: Cherokee
Engine: 4.0 inline 6cyl
stock 01 Cherokee Sport 4.0 inline 6 303 code
Any ideas on repeating 303 misfire code on stock 01 Cherokee Sport? It has just started doing this, has 166000 miles, It doesn't smoke, use oil or leak any fluids. I've replaced the plugs with Autolite Platinums. Cleared the code with scanner. IN about apprpx 100 miles, the check engine light came back on, used scanner pulled the same 303 misfire code. Took plug out, none were burnt, all still looked new, cleared code with scanner, drove another 100 miles approx and the check engine light with same code again. Anyone have any ideas? 1st Cherokee I have owned. Thank you,
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Year: 2001
Model: Cherokee
Engine: 4.0
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Year: 1999
Model: Cherokee
Engine: 4.0
The fix recommended in the TSB in the above link in reply #2......doesn't always work.
00-01 is the most susceptible to "heat soak" and the accompanying cylinder 3 misfire.
Other things to consider if this problem is persistent include louvers into the hood and my favorite fix is to add a simple timer that keeps the e-fan on for a bit when you turn off the key. This lowers engine bay temps quickly and prevents the heat soak symptoms.
00-01 is the most susceptible to "heat soak" and the accompanying cylinder 3 misfire.
Other things to consider if this problem is persistent include louvers into the hood and my favorite fix is to add a simple timer that keeps the e-fan on for a bit when you turn off the key. This lowers engine bay temps quickly and prevents the heat soak symptoms.
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