BluBlocker
Member
Hello,
Thanks to all who respond to posts...I can usually search and find answers by reading responses. This situation is similar to other posts, but I have tried some fixes and no luck so far. My 2010 expedition (183,000 miles) has hesitation and loss of power. I am the second owner as of 101,000 miles and I don't believe the plugs/coils have ever been changed. While driving, sometimes it doesn't want to accelerate very well from a stop. It hick-ups and jerks. I have to pull off the accelerator and press again and sometimes again before it accelerates smoothly. Also while already driving (any speed) if I pull off the accelerator for a moment, and then back on it reacts the same way. I have noticed that if I pull off momentarily and the car seems to be "coasting" and I press on the gas again, it responds by jerking and weak/bogged acceleration. However, if I pull off and wait for "engine brake" where I can hear/feel the engine decelerating, and then I press on the gas again, it responds fine. The other symptom is that I can be out of drive (in 3rd. gear) at 4K or 5K rpm and it accelerates fine with normal acceleration. But the moment I mash the pedal and go WOT, it bogs and does not want to accelerate.
I have changed all four oxygen sensors, both VVT solenoids, and the crankshaft position sensor. Last night I put a bottle of Techron fuel system cleaner to see if that helps. I checked to see if the oil from the K&N had migrated to the MAF, but it looked clean. Seems like an air or fuel problem, but could be spark?
Thanks for reading...Thanks for responding!!
Thanks to all who respond to posts...I can usually search and find answers by reading responses. This situation is similar to other posts, but I have tried some fixes and no luck so far. My 2010 expedition (183,000 miles) has hesitation and loss of power. I am the second owner as of 101,000 miles and I don't believe the plugs/coils have ever been changed. While driving, sometimes it doesn't want to accelerate very well from a stop. It hick-ups and jerks. I have to pull off the accelerator and press again and sometimes again before it accelerates smoothly. Also while already driving (any speed) if I pull off the accelerator for a moment, and then back on it reacts the same way. I have noticed that if I pull off momentarily and the car seems to be "coasting" and I press on the gas again, it responds by jerking and weak/bogged acceleration. However, if I pull off and wait for "engine brake" where I can hear/feel the engine decelerating, and then I press on the gas again, it responds fine. The other symptom is that I can be out of drive (in 3rd. gear) at 4K or 5K rpm and it accelerates fine with normal acceleration. But the moment I mash the pedal and go WOT, it bogs and does not want to accelerate.
I have changed all four oxygen sensors, both VVT solenoids, and the crankshaft position sensor. Last night I put a bottle of Techron fuel system cleaner to see if that helps. I checked to see if the oil from the K&N had migrated to the MAF, but it looked clean. Seems like an air or fuel problem, but could be spark?
Thanks for reading...Thanks for responding!!