I have a 2001 jaguar s-type that is misfiring badly. It started around 55-60 mph then moved on to a all the time problem. I went to change the spark plugs and found there was oil on the passenger side front 3 coils (I am unsure of the numbers) the oil was completly covering 2 spark plugs and half way up the third
Hi bravo956
i also have the same problem regarding the oil leak. this is due to the spark plug gasket leaking and you will need to replace them. they are circular gaskets about 1.5 inches across that fit to the underside of the rocker covers and prevent oil from seeping down the long spark plug hole. when i investigated my leak i assumed it was just the rocker cover gasket that was leaking but once everything was removed it is obvious.
The misfire is probably not caused by the oil leaking on to the plugs.
this is most likely due to one or more of the coils breaking down, when this happened to my jag i bought two coils and swapped the coils out one by one listening to the engine each time, when the engine sounded better i put that bad coil to one side and carried on until all coils had been checked and the engine sounded a smooth as it could, the car now drives well and i have a spare coil for when the next one breaks down.
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Dont sound good,check for source of oil leak ,is the coil pack oil cooled and its leaking,without car infront of me ??its difficult to tell whats wrong sorry
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Bad miss at idle?
http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html
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While stop engine idles
like cylinder missing?
http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html
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Engine Misfire codes for
car?
http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?
http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
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Misfire on cylinder 4?
http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html
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Oil on spark plugs and car misfires?
http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html
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This will help.
Thanks.
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