Need help, miss firing and given code P0355 - JeepForum.com

 
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post #1 of 4 Old 09-24-2012, 10:55 AM Thread Starter
Pigpen14
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Join Date: Sep 2012
Location: San Antonio
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Need help, miss firing and given code P0355

So the other day i pick up my old jeep from my mom and drive it to work fine. got off work, started it and started miss firing kinda bad. i got a little code reader from my friend that hooks up to my phone and it gave me code P0355 ignition coil f primary/secondary circuit. i figured it was a bad coil so got a new one and swapped it into cylinder 5 from what auto zone said the code came up with and did nothing. i pulled the plug and it was covered in carbon. me and my dad replaced all the plugs bout 2 months ago, also tried to change the fuel filter but couldnt get the old one off.
Can anyone help me? i need to get it fixed by Wednesday morning.

Oh and it is a 2001 Grand Cherokee Limited 4.7l all wheel all time with like 190k miles

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post #2 of 4 Old 09-25-2012, 05:51 PM
pshivers
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Check for melted/pinched/dirty wires in the harness causing a restriction of current flow in the primary winding. Due to the carbon build up, that I am assuming is only in that cylinder, it was probably caused by weak spark.
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post #3 of 4 Old 09-26-2012, 07:41 AM Thread Starter
Pigpen14
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Quote:
Originally Posted by pshivers View Post
Check for melted/pinched/dirty wires in the harness causing a restriction of current flow in the primary winding. Due to the carbon build up, that I am assuming is only in that cylinder, it was probably caused by weak spark.
The wires look good from what i can see and i pulled the plugs in cylinder 5 and 6 both had carbon build up. i also got a new coil to try that and still nothing... the the plugs are champions and only bout 4 or 5 months old. i scheduled an appointment at the dealer for next wednesday cuz thats the soonest they can get to looking at it.
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post #4 of 4 Old 09-26-2012, 01:51 PM
pshivers
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Good luck. Let us know what the dealer says.
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