G35 Coupe V35 2003 - 07 Discussion about the 1st Generation V35 G35 Coupe

Spark plug well causing missfire

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Old Sep 13, 2020 | 10:58 AM
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Siciliang35's Avatar
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Spark plug well causing missfire

I changed the valve covers not too long ago maybe a few months and one of them is leaking causing a missfire. Is there any way to get by for a while without redoing it. I'm getting a misfire but no check engine light. Will cleaning it really well get me by.
 
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Old Sep 13, 2020 | 03:11 PM
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After taking out the spark plug cleaning the well and putting everything back together and now I got PO113 code this is giving me a headache now
 
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Old Sep 13, 2020 | 03:20 PM
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04.5 G35 Sedan 5AT
For the P0113, check the electrical connection on the MAF sensor, as I think the MAF on these cars has the intake air temp sensor built into it
 
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Old Sep 13, 2020 | 04:14 PM
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Yeah I double checked that and I think the code went away after replacing cylinder two ignition coil it's still misfiring but even worse
 
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Old Sep 15, 2020 | 10:27 AM
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Originally Posted by Siciliang35
Yeah I double checked that and I think the code went away after replacing cylinder two ignition coil it's still misfiring but even worse
Make sure you have the coils plugged into the correct harness connections.
Its very easy to swap the #4 and #6 connections (others as well), thus causing the misfire.
 
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Old Sep 15, 2020 | 12:18 PM
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Originally Posted by andrewl_v35
Make sure you have the coils plugged into the correct harness connections.
Its very easy to swap the #4 and #6 connections (others as well), thus causing the misfire.
I I think I had my connector that wasn't pushed all the way in I got that taken care of The problem is I got to most likely change the valve cover soon which I already did not too long ago
 
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Old Sep 15, 2020 | 03:26 PM
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What makes you think it's the valve cover other than recent work done? Have you actually checked and found a pool of oil messing with the connection of one or more of your ignition coils, or wicking down the spark plug threads into the combustion chamber?

 
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