Hi, looking for an answer on my 99 Ford Expedition 4.6. 156,000 miles. I've changed 7 of 8 spark plugs and have now changed 7 of 8 plug wires. Since changing the plugs and wires, I''ve been getting misfires on cylinders 2, 4, 6, 8. The check engine light will flash and it won't accelerate as well. The one plug and wire that was not changed was Cylinder #7. I've talked to the local garage and they say the intake shold come off for the plugs to be changed, has anyone heard of that before? What is the proper plug and Gap for that vehicle. And, does anyone know where the A/C Lines run for the rear heat and Air on this vehicle. I'm sure I have a leak, I have the leak detector and UV light, I just want to know where to look before adding the dye in the system. One more thing, will a cold air kit for this vehicle improve gas mileage? Thanks.-Paul
have the same problem?
Monday, May 14th, 2007 AT 11:18 AM