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Slight stumble/knock

Luke95

NAXJA Forum User
Location
CT
at idle my engine has a slight stumble to it its not bad and it sounds like its just a timing issue? 1987 XJ
 
Not likely. The timing is electronic. Has it had a full tune up lately? Plugs, wires, rotor, cap? Has the IAC been cleaned? Have the sensor grounds been checked???
 
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