I have a 4 cylinder car, all three spark plugs are working well but one is not though it's new. Could it be the cable or the distributor?
Dec 13, 2009 at 10:10 AM
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BLACKOP555
CERTIFIED EXPERT
10,386 POSTS
check the spark on that cylinder with a spark tester.
make sure it goes to a good clean ground. and the spark is bright and blue.
if nothing or a different color then blue spark check the wires ressitance and the rotor and distributor cap for wear or corrosion. switch the wire and plug with a different cylinder and see what happensl