Paul2003
Well-Known Member
Since I bought my 2003 Expedition a year ago I have had an intermittent stumble/ misfire but no code. Had it in a few times and they always find something to fix but the problem remains. So far I have had the #4 coil and plug changed, the #8 coil and plug changed, the fuel pump changed, the fuel pressure regulator changed, the 6 remaining coils stress tested and the intake manifold and injectors pressure cleaned.
Since the truck came with a 2 year aftermarket warranty I keep taking it in but I'm tired of it and will try to fix it myself now.
It idles perfect and runs fine when cold. It lasts 5-10 minutes but is not bad enough to stop the engine or make you pull over.
Right now I'm thinking of replacing the 6 remaining coils and am looking for suggestions where else to look.
Thanks
Since the truck came with a 2 year aftermarket warranty I keep taking it in but I'm tired of it and will try to fix it myself now.
It idles perfect and runs fine when cold. It lasts 5-10 minutes but is not bad enough to stop the engine or make you pull over.
Right now I'm thinking of replacing the 6 remaining coils and am looking for suggestions where else to look.
Thanks