Restricted performance misfire
#1
Restricted performance misfire
Just started getting a restricted performance message with check engine light. Code shows P0308 - #8 cylinder misfire. Car has been running a little rough at idle when started cold (and outside temps around 40F), runs a little rough at speed for about 30 minutes then runs smooth. If the restricted performance doesn't come on within 30 minutes, all is well.
Any thoughts or votes for:
Spark plug or coil?
I do not know history of when either were last changed.
Always something, I bought the car not running, got it running, then replaced a lot of suspension parts and brakes and now it doesn't like when I drive it all over.
Any thoughts or votes for:
Spark plug or coil?
I do not know history of when either were last changed.
Always something, I bought the car not running, got it running, then replaced a lot of suspension parts and brakes and now it doesn't like when I drive it all over.
#2
Just started getting a restricted performance message with check engine light. Code shows P0308 - #8 cylinder misfire. Car has been running a little rough at idle when started cold (and outside temps around 40F), runs a little rough at speed for about 30 minutes then runs smooth. If the restricted performance doesn't come on within 30 minutes, all is well.
Any thoughts or votes for:
Spark plug or coil?
I do not know history of when either were last changed.
Always something, I bought the car not running, got it running, then replaced a lot of suspension parts and brakes and now it doesn't like when I drive it all over.
Any thoughts or votes for:
Spark plug or coil?
I do not know history of when either were last changed.
Always something, I bought the car not running, got it running, then replaced a lot of suspension parts and brakes and now it doesn't like when I drive it all over.
Whilst doing the swap, check the plug for gap and spark.
Graham
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MR. CJ (02-25-2012)
#3
Last night I removed the #8 coil and spark plug. The plug tip was very dirty and likely fouled. Conveniently, the #8 sits under the coolant reservoir and oil fill cap and would be the first location in which any excess spilled fluids would go. I had purchased a new spark plug and installed it along with swapping the #8 coil with the driver side front coil. I cleaned all parts and reinstalled. 100 miles of driving and no issues, check eng, or restricted performance. I'm hoping the $5 spark plug did the trick. Thanks for the tip. I wish all repairs were this simple.
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98, car, check, code, codes, engine, jagaur, jaguar, light, message, performance, perfromace, po308, proformance, restricted, restrictive, restristed, xj8, xk8
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