Jkogrey82
Member
Hey guys. I'm down to my last nerve on this issue. 2015 Expedition with 3.5l EB. I have engine vibration/growling when I'm driving and my foot is barely on the gas and car need is to accelerate or cruising but going up slight incline. If I do light acceleration especially on a hil, then it almost feels like it is on too high of a gear. I can do it in highway too but similar conditions i.e. cruising and going on slight incline but it wont downshift automatically. I changed plugs but not cops. I installed passenger side catch can and still having issue. I'm down to either changing cops or drilling weep hole. I also bought a scanner with Mode 6 and only found 1 misfire driving 15 mins (but it probably did the issue like 5 times). I'm also running 87 gas but adding seafoam in my gas tank. Please help and let me know what yall have done??? I have an Autel AL 519 so let me know if there is an option on there to monitor something specifically to determine root cause.
James
James