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After changing sparks plug the check engine light came on. I have checked the gap on spark plugs twice. After reinstalling plugs then driving for a while light comes back on.
Always replaced spark plugs before a smog. Jeep ran fine until i changed plugs.
New Spark Plugs: AutoLite AP985 Gap: .35
Computer Code: #43
What I found about code 43:
*Peak primary coil current not achieved with max dwell time
*Cylinder misfire
*Problem in power module to logic module interface
Whats my next move, check or part to replace?
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Check the plug wires and coil wire. Make sure they are in good condition, no corroded terminals , etc.
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What year is your xj?
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1997
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make sure you didn't get two wires switched? Happens to the very best, sometimes...
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change your O2 sensor. should really do this every couple years anyway.
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Replacing spark plug wires solved check engine light issue. Forgot about O2 sensor will change tomorrow that may smooth out my idle issue, Thanks.
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