P050A Code - Cold Start Idle Air Control System Performance

[brandonalberd]

Since last Wednesday, I've been having an issue upon cold start, and even sometimes after the cars been driven a bit. I filled up at a gas station I don't typically use ( Shell ) with 93. Noticed it about 10 min later after stopping to get food that it hesitated to start, but did. Didn't think much of it, but later that night I left work, hit the start, hesitated, almost as if it was on E85, and then idled rough as hell, but straightened up.

I logged the car Friday morning, thinking maybe I had an 02 taking a dump, but both show fine. Noticed short terms are bouncing everywhere, so I think vacuum leak. Checked Friday afternoon and can't seem to find anything anywhere. Replaced plugs just to be safe. Nothing. I've now noticed that simple driving, the fuel trims stay around -2 to +2, but if i'm light on the throttle, or say engaging the clutch to go to idle, they bounce everywhere.

Car is a 2016 GT, 2.9L Whipple with the 132MM TB. Never had an issue until last Wednesday, and kit was installed at 400 miles, now has 26K.

Anyone got any leads, maybe had somewhat of the same issue? I've been told could be TB, could be a failed cat being a blower car?

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