Mudsport96
Full Access Member
No time to look at it tonight so first thing in the am i have start on that.... fun.
Misfire on number 8
- Thread starter Mudsport96
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Was that the only code and how old are the plugs and wires?
OP
OP
Mudsport96
Full Access Member
Yes only code and i haven't done plugs and wires since I bought it. It had i believe 116k on it when i got it but dont remember for sure. It is probably time for them, as i dont know if they were done prior to me buying it. And I am pretty sure it isn't just a miss, it feels like a completely dead hole.
After this cup of coffee I will head out and start pulling the plugs. Wish me luck.
After this cup of coffee I will head out and start pulling the plugs. Wish me luck.
Had 116k miles when bought, how many miles now?
Pull ALL plugs and do a compression test on ALL cylinders. Post pics of ALL plugs in cylinder order. A dead whole feel? A bad plug can have a "no fire" condition and therefore the hole is dead.
OP
OP
Mudsport96
Full Access Member
145k now. Plugs all gapped at spec so the dealership must have done a full tune up before i got it.
Dead hole is what the guys and i called a cylinder that wasn't just misfiring once and a while. It was "dead" as in every rotation it did not fire.
I found the culprit and will update
OP
OP
Mudsport96
Full Access Member
Ok short version
Dead coil on cylinder 8.
Long version,
Check spark = no spark
I have a custom spark tester i made up out of an old sparkplug soldered to 3 feet of 12ga wire with an alligator clip on the end. That way I can stick it in a plug wire and clip it on the negative terminal to check spark.
Pull wire off of 4 and put on 8 coil... still no spark.
Move 4 coil to 8= spark
8 coil = dead.
Raid the parts bin and found a junkyard coil, hook up.... spark!
Backroads full throttle passes to clear plugs and clean cats.
All good now.
Dead coil on cylinder 8.
Long version,
Check spark = no spark
I have a custom spark tester i made up out of an old sparkplug soldered to 3 feet of 12ga wire with an alligator clip on the end. That way I can stick it in a plug wire and clip it on the negative terminal to check spark.
Pull wire off of 4 and put on 8 coil... still no spark.
Move 4 coil to 8= spark
8 coil = dead.
Raid the parts bin and found a junkyard coil, hook up.... spark!
Backroads full throttle passes to clear plugs and clean cats.
All good now.
OP
OP
Mudsport96
Full Access Member
Just for reference 
Yeah boyeee!!!!
rockola1971
Full Access Member
Ive got a home made spark tester too. Its using the existing spark plug and wire and let the plug lay up against the head and crank away. Youll hear it snap.
OP
OP
Mudsport96
Full Access Member
Yeah i do that too, but this way you know it is definitely getting a good ground.
