Codes concerning misfire.

rfreeman37

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Hello again fam

The GEN3R is installed. Excited about that, but have some codes showing up surrounding misfires. The codes are as follows: P0300, P0302,P0304, P0316, P0507, P2195, P2197. The last two are O2 sensor stuff. If anyone has any thoughts or suggestions please share them. Also full disclosure I changed the plug and coil on cylinder 2 and code still returned.
 

Norm Peterson

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If the same code(s) returned, it points to the problem being upstream of the coil. Which could be anywhere from the harness connector to the coil to what the various sensors are telling the ECU.

You've got two cylinders misfiring, at least randomly and/or during startup, plus a high idle and both banks running lean. Any chance of an air leak downstream of the mass air flow sensor, where you'd be getting unmetered air that the ECU can't be knowing about?


Norm
 

rfreeman37

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If the same code(s) returned, it points to the problem being upstream of the coil. Which could be anywhere from the harness connector to the coil to what the various sensors are telling the ECU.

You've got two cylinders misfiring, at least randomly and/or during startup, plus a high idle and both banks running lean. Any chance of an air leak downstream of the mass air flow sensor, where you'd be getting unmetered air that the ECU can't be knowing about?


Norm
I will have to check for leaks. But sounds like the condition is coming from being lean? Am I understanding that correctly?
 

rfreeman37

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Yes I used the NGK 6510. I'm not sure what could be the issue. I replaced the coil and plug and the code returned so definitely continue to provide any suggestions.
 

rfreeman37

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What are the plugs gapped at?
.028 is the gap. Also can someone tell me the length for the belt on the passenger side of a 2013 Mustang GT with a GEN3R blower with 88mm pulley? One suggestion was K060825 one was K060806. Let me know that as well. Done some data logging and noted that according to a friend of mine (Who is smarter than I) that the fuel was off some aka Rich. Could that be one of the things causing a misfire?
 

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