Cylinders Misfiring

[ChuckD2752]

Hi All, I’m trying to figure out why I’m experiencing 2 cylinders misfiring in my 2017 Mustang GT Premium. Cylinders 3 & 7 misfire every now and then when the car hits 45-50mph for about 15+ seconds and then start working again.

I’ve replaced the spark plugs and the ignition coils. Any ideas on what to try next? Thinking about taking it to Ford next.

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[NGOT8R]

Have you gotten a P0316 DTC? If so, try a crank relearn to see if that sorts out the misfire issue. Your handheld or nGauge tuner will allow for this.

 

[ChuckD2752]

Have you gotten a P0316 DTC? If so, try a crank relearn to see if that sorts out the misfire issue. Your handheld or nGauge tuner will allow for this.

I was wrong, the cylinders misfiring are 4 & 7. The codes I’m getting are P0300, P0304, and P0307.

 

[NGOT8R]

I was wrong, the cylinders misfiring are 4 & 7. The codes I’m getting are P0300, P0304, and P0307.

Generally speaking, I also had those codes and no P0316. I did a crank relearn anyway and the misfires cleared. It can’t hurt to give it a shot.

 

[ice445]

Intake manifold probably needs replacing, the IMRC throttle shaft loves to break on those years

 

[ChuckD2752]

Generally speaking, I also had those codes and no P0316. I did a crank relearn anyway and the misfires cleared. It can’t hurt to give it a shot.

Definitely worth giving it a shot. I have an NGage tuner. Would you happen to know if there’s a good video out there to show me the process? Thanks!

 

[ChuckD2752]

Intake manifold probably needs replacing, the IMRC throttle shaft loves to break on those years

Thanks for the info! I’m going to try a crank relearn first and then I’ll look into this if that doesn’t do it.

 

[ChuckD2752]

Generally speaking, I also had those codes and no P0316. I did a crank relearn anyway and the misfires cleared. It can’t hurt to give it a shot.

FIXED!!! Thanks so much!!!!!!

 

[NGOT8R]

FIXED!!! Thanks so much!!!!!!

Yessir! Glad it worked for you. Simple and free are always the best kind of fixes.

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