Hello All,
Looking for some help please ? 2003 Expedition Eddie Bauer 5.4 L Triton engine . Owner for ten years and 167,000 miles. Started having issues with engine and my mechanic determined indicative of failing intake manifold gasket . Once he had it apart he determined manifold itself was showing signs of age and as he knew my intention was to keep vehicle he recommended swapping out manifold at same time . Additionally performed cooling system flush n as had already suffered several power coil failures I decided to replace remainder. After job done began to get service engine lights randomly and pronounced gurgling sounds inside engine cabin. Lights indicated " intermittent misfires " which turned out to be one bad power coil n another bad power coil connector. Gurgling attributed to need for cooling system to be burped . While driving temp needle would randomly spike to red line , critical warning light would come on , and engine would enter " reduced power mode ". When thus would occur usually after a couple of seconds it would fall back to normal range . Heat would blow but variate between warm n cool , never getting to max set temperature . Over period of two weeks we attempted to belch several times each time adding more coolant as needed. Returned to mechanic who realized that he initially missed fact truck had secondary rear heater core. He flushed rear lines and cooler . Gurgling again so we burped again n now heat was normal . After 4 days upon engine starting service engine light came on again and while driving now engine light will spike to red line , warming light n reduced power mode again but now temp does not return to normal but stays spiked until vehicle is shut off. Then normal operation n heat ? Burped coolant system one more time n same series of actions occurred three days later ? We are befuddled at this point and I am very fed up as this has gone on too long ! Looking for info please? Should I have him flush entire coolant system again ? I am at the point I want him to rip the manifold and start from scratch . Thanks
Looking for some help please ? 2003 Expedition Eddie Bauer 5.4 L Triton engine . Owner for ten years and 167,000 miles. Started having issues with engine and my mechanic determined indicative of failing intake manifold gasket . Once he had it apart he determined manifold itself was showing signs of age and as he knew my intention was to keep vehicle he recommended swapping out manifold at same time . Additionally performed cooling system flush n as had already suffered several power coil failures I decided to replace remainder. After job done began to get service engine lights randomly and pronounced gurgling sounds inside engine cabin. Lights indicated " intermittent misfires " which turned out to be one bad power coil n another bad power coil connector. Gurgling attributed to need for cooling system to be burped . While driving temp needle would randomly spike to red line , critical warning light would come on , and engine would enter " reduced power mode ". When thus would occur usually after a couple of seconds it would fall back to normal range . Heat would blow but variate between warm n cool , never getting to max set temperature . Over period of two weeks we attempted to belch several times each time adding more coolant as needed. Returned to mechanic who realized that he initially missed fact truck had secondary rear heater core. He flushed rear lines and cooler . Gurgling again so we burped again n now heat was normal . After 4 days upon engine starting service engine light came on again and while driving now engine light will spike to red line , warming light n reduced power mode again but now temp does not return to normal but stays spiked until vehicle is shut off. Then normal operation n heat ? Burped coolant system one more time n same series of actions occurred three days later ? We are befuddled at this point and I am very fed up as this has gone on too long ! Looking for info please? Should I have him flush entire coolant system again ? I am at the point I want him to rip the manifold and start from scratch . Thanks
