Cyl 5 Misfire - Defender Source
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  #1  
Old January 6th, 2012, 10:24 PM
Mpower619
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Ricardo Gomez
1997 D90
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Cyl 5 Misfire

Newbie here! Anyone know how to repair a cylinder 5 misfire? Trying to smog my car bbut have a check engine light on. Already replaced all O2 sensors and Temp Switch and now have a cylinder 5 misfire fault code. All help is appreciated.
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  #2  
Old January 6th, 2012, 10:58 PM
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Carl Jonsson
1995 NAS D90 #219
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Details would help. Vehicle model, engine type, etc
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Old January 7th, 2012, 04:36 PM
Mpower619
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Ricardo Gomez
1997 D90
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ha, sorry about that. its a 1997 D-90 4.0
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  #4  
Old January 7th, 2012, 08:30 PM
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Phillip
1995 SW #487/500
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coil pack? I dont think these ever go bad. WHat fuel what plugs and what mileage?
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Old January 7th, 2012, 09:27 PM
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Scott
1997 D90 ST #1444
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I can not confirm this but, I have been told this before, check your ABS sensors, I have heard that when they are bad, caked with mud or misaligned they can produce misfire type information? Can someone confirm this?

The truck does not have ABS, but it does have the sensors and they are tied to a rough road sensor?
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Old January 7th, 2012, 09:46 PM
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Ethan
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How are the wires in this thing? You might start by buying a set of genuine wires and see if your problem resolves itself. Is the misfire continuous? Does it happen at a certain engine speed? I have seen a couple trucks with faulty vehicle speed sensors misfire too. If you can look at the freeze frame data, check to see if it says the truck was going 28,000 mph or something when the fault happened. Hopefully it isn't a sticky valve, which can only be remedied by pulling the heads.
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Old January 7th, 2012, 11:10 PM
Mpower619
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Ricardo Gomez
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Thanks guys, im going to start by buying new plugs and wires. Then Ill scan it again.
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