Re: F-150 Supercrew Engine Revving with no added power?
> Intermittently my F-150 Supercrew 2001 5.4(?)L (gasoline) truck will sound
> like it's revving like crazy, but there's no added power to go with it. I'm
> having trouble remembering to look at the tachometer when this happens, but
> I think it really isn't increasing the rpm's. What it really sounds like is
> a big air sucking sound more than an increase in rpms. Does anyone have any
> idea what I'm trying to describe and what it's all about? It even seems
> like a loss of power when this is happening.
I'll bet it is the cooling fan clutch engaging. Does this only happen
when it's hot and at low speed?