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International Automotive Technicians Network
Re: What is acceptable Back Pressure?
Posted to Technical Discussion Forum on 12/2/2009

The owner said today that no CE light or misfire problems had been experienced.

He did say that the engine has used a quart or more of coolant per month since the vehicle was new. Kinda explains the sludge problem in the oil pan. I think the cat was going aw... Login to read more.