Low end Knock at about 2500

sounds like a timing isssue get to your part store rent a timming gun and jump pins te1 and e1 in the dignostic connector under the hood. and when you get the gun it should come with instuctions or ask the people to how do it or you can take it some where and have them do it. after that i think it would be good for many more weekends of fun.

Got One, hope that's all it is. What does the jumper do.