misfire after head swap

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Jan 10, 2012 | 01:20 PM

buzb026

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From: Arlington Heights IL

misfire after head swap

my car has stock tune and now has longtubes ORY and catback. put some ported 243's on and i am getting a misfire in cylinder 5. could all this air flowing through on stock tune cause a misfire?

Jan 10, 2012 | 01:29 PM

krissoto

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From: Bonne Terre, MO

only if it might have fouled the plug. Change the plug and chk your connections on your coil packs and wires .

Jan 10, 2012 | 02:22 PM

Burken01

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From: Anaheim, Ca

Quote:

Originally Posted by krissoto

only if it might have fouled the plug. Change the plug and chk your connections on your coil packs and wires .

this ^^^, my car was misfiring and my check engine light was on.

I plugged my diagnostic obd2 scanner in, and i had cylinder 8 out..

just replaced the sparg plug and it was fixed..

the plug might of got damaged during the swap or if you reused them it might of fouled out..

Jan 10, 2012 | 02:24 PM

Burken01

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From: Anaheim, Ca

Quote:

Originally Posted by krissoto

only if it might have fouled the plug. Change the plug and chk your connections on your coil packs and wires .

and check your spark plug wires, make sure you hear them click when you press them on... grip the boot of the plug wires when applying pressure, if you dont then sometimes it wont click in, even though it still looks connected.

Jan 10, 2012 | 06:10 PM

squirlNUTZ

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From: Oklahoma

I had a miss fire code after my engine swap. Turned out to be two things: I has damaged the map sensor pig tail, and the intake rocker arm on number 4 had come off and was laying there next to the pedestal