Mechanics

MISSING

1992 Jaguar XJ40

Engine Performance problem
1992 Jaguar XJ40 6 cyl Two Wheel Drive Automatic 150000 miles

The car misses after it reaches operating temperature at all rpms more noticeable at an idle
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Shawncanada
May 23, 2009.




Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

Rasmataz
May 23, 2009.


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