My 5.4 started running ruff. scanner said cylinder 1 misfire. My plugs were replaced 6 months ago so I replaced the ignition coil. After starting the truck my check engine light came back on. Scanner said

Cylinder 1,2 and 3 misfire.
Oxygen sensor stuck rich
Bank 1 system too rich.

I took it out on the road and got down on. After I got up to 55 mph the truck ran fine. When I got home and let it idle it started running ruff again.

My question is if I drive it will smooth out since replacing the coil and let the system reset?

 

Hi Tommy;

Please read this: http://ww2.justanswer.com/uploads/sd...229_r07m08.pdf

Yer symptoms may be indicative - address ASAP.

Also discussed in this thread: https://www.f150online.com/forums/v8...ram-07m08.html

Good luck
MGD