Stumble..rough idle
#1
Stumble..rough idle
2001 F150 5.4. Plugs replaced a month or so ago. I did not drive the truck all weekend. then on the way to work this morning the truck started to stumble and hesitate. Check engine light came on and flashed and then went out...still stumbling. At a stop light the truck will shutter real bad. Put the truck in park and it all goes away??? Any idea?
#4
#5
Under Load - Weak Spark?
I had an old Camaro with points ignition and this happened to me. Turns out there was oxidation on the points that gave it enough spark to idle, but when put in gear under load it would stumble and only go about 15MPH. Once the points were cleaned up it ran great.
I vote for a spark problem.
I vote for a spark problem.