GEN 2 5.0 IDLING ISSUES (sputtering/popping)

[mcgjax2003]

Hey All , I have a 2016 mustang GT , mods include : Long tube headers , PMAS cold air intake , Gen 3 ported manifold , and a Full catless exhaust. About 3-4 days ago i was just casually driving , pulled up to a stoplight and noticed my car was kind of shaking at idle , I rolled my windows down to listen to my exhaust and heard what sounds like a small back fire about every 3 seconds. It almost sounded like the car had a vaccum leak but I knew it was something more than that. I called my tuner and had him come over the next day to check car out , He found that bank 1 is adding fuel while bank 2 is pulling fuel. He said this could be caused by a fouled spark plug , I pulled the plugs and they didn’t look too bad , I had just replaced them about 500 miles ago before I put on gen 3 manifold. Me and my tuner have no clue as to what could be causing this , I’m thinking a gunked up injector maybe? Has anyone ever experienced anything like this? I’m at a loss right now and don’t wanna just throw parts at it hoping to fix it.

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[FiveOh500]

Sounds like you might have a bad injector on bank 2 since it's pulling fuel while bank 1 is adding - I'd try swapping injectors between banks to see if the problem follows the injector.

 

[masonmort27]

did you ever find anything?

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