Surges are caused by vacuum leaks. Get a can of spray gumout, start the car, or have someone else do it and spray around vac hosoes and the corners of the intake manidold, when a change in RPM occurs you are in the right place. 5.0 engines have a problem with the aluminum intakes disolving at the corners! Also were the PCV plugs in at the back, top middle of the intake, the rubber bushing becomes brittle. This cauases oil and air leaks!
Monday, March 5th, 2007 AT 6:59 PM