engine misfire
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Joined: Nov 2009
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From: san antonio,texas
engine misfire
my engine on the # 3 cylinder displayed a misfire on my diagnostic tool . i replaced the spark plug, all the spark plug wires and both coils, swapped injectors. the engine still idles rough and misfires. what else could cause this problem . i also had a egr flow code readout.
Thread Starter
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New User
Joined: Nov 2009
Posts: 2
Likes: 0
From: san antonio,texas
engine misfire
1998 4.6 liter automatic. i ohmed the old coils and they check good. one of the new coils was out of tolerance. i installed the old coils, replace both forward oxygen sensors and now the truck runs great. the old # 3 spark plug wire checked bad.
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