Expert: Chris - 6/13/2009

Question
My truck seems to hesitate all the time. kind of feels like someone is putting on the brakes and letting off repeatedly. what is the cause of this? thank you

Answer
hey there, there are many different things that can cause this issue, you need to check your basics, check for fuel delivery, injector pulse if its fuel injected, check for spark at each cylinder and the last step is to check cyinder compression, normal compresion should be around 150 - 200 psi and not vary between cylinders by more than 10 percent.
let me know how these tests go.
Chris