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95 S_Trucker · 01-21-2018, 08:35 PM

Find or borrow a good scan tool, and under data display, look in misfire history. I can almost guarantee you'll find a cylinder that has a lot more misfires than the others.

01-21-2018, 08:35 PM	#5
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,179	Re: 2003 2500hd 6.0 odd vacuum leak issue Find or borrow a good scan tool, and under data display, look in misfire history. I can almost guarantee you'll find a cylinder that has a lot more misfires than the others.