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AnimalMother · 09-13-2021, 03:05 PM

Found the problem, turned out to be a bad MAF sensor. I read that if you unplug the MAF that the ECU will run in a safety mode, and in doing so the truck instantly ran better. Replaced the sensor and it's solved the majority of the issues. It still starts rough and needs properly tuned for the cam, but it's now drivable.

09-13-2021, 03:05 PM	#4
AnimalMother Registered User Join Date: Sep 2011 Location: OKC, OK Posts: 5	Re: 5.3 Gen 3 - Misfire/rough idle Found the problem, turned out to be a bad MAF sensor. I read that if you unplug the MAF that the ECU will run in a safety mode, and in doing so the truck instantly ran better. Replaced the sensor and it's solved the majority of the issues. It still starts rough and needs properly tuned for the cam, but it's now drivable.