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2007 suburban 5.3 running rich
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Question
jcwilliams
I have a 2007 suburban 5.3 flex fuel engine. Has p0172 and p0175 both banks running rich.
Fuel alcohol is at 76% on regular fuel.
I've had two shops with snap on scanner not be able to get in there and reset that parameter.
Long term trim is pegged at -19%
I'm at a loss other than the dealership...
Any ideas?
Thanks
James
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