Imightadid
New Member
I have a 98 expedition 4x4 with a 4.6 romeo. 222k miles. I'm experiencing a lot of knocking/clacking/pinging when accelerating, especially on inclines. The problem seems to be getting g worse. It does not do this in neutral even at higher rpms. I've read so many conflicting opinions about this and one mechanic even told me that the engine was likely at the end of its life. He called it piston slap but it only makes these sounds under load or heavy acceleration. It has 222k miles so maybe he's right? I cleaned the MAF with MAF cleaner. The sensors were pretty dirty but they look clean now. This does not appear to have helped. I'm on a tight budget and this is my only vehicle. I was planning on moving about 950 miles but I'm feeling very insecure about this vehicle.