Originally Posted by
rayrevolver
I am at 92,000 miles. The other day I got on the gas to get out in front of traffic and around 5000 rpm it started to almost feel like the rear tires were searching for grip. The check engine light blinked and then extinguished.
Sounds like a misfire from the manual and my bluetooth OBD didn't find any codes in history, I wish it was plugged in at the time. I have since tried some higher RPM acceleration and it has started to bobble above 5k rpm, but no check engine light.
Bought 6 sparkplugs (Motorcraft SP-580) and plan to install this Friday. They are supposed to come gapped around .030-.031 which is perfect for the 3.5L Ecoboost. But some had more gap which I addressed, all gapped to .030 as best I can. I am hoping that some of the plugs look bad on the way out because I am not sure how to troubleshoot the coils.
The plugs are supposed to be replaced at 100k anyways, so we got pretty close. Towing 6500lbs of trailer this Saturday so I wanted to be sure it was making good power before the trip.