In order for an engine to perform its best, it must have proper fuel, spark, and cylinder sealing. Conducting a leakdown test is the best way to determine if there's a problem with a particular ...

Hello. I've had an ongoing problem with my 2008 Corvette for over a year. I have reoccurring fault codes of P0171 and P0174, fuel trim lean on bank one and two. I have had the car to four shops and ...