While driving @ 55 mph going to accelerate truck will down shift to drive and then to the next gear raising rpms to 4K and higher at this point the truck will ping heaviely and check engine light will come on. The light will go off about 20 seconds after letting off the gas. Ideas on how to stop this? Running 92-93 octane fuel already. Other than that the truck runs fine. [img:168db36308]http://www.2carpros.com/forum/automotive_pictures/476524_003_1.jpg[/img:168db36308]
Feb 4, 2010 at 4:08 PM