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Car Forum / Ford / Ford Explorer / October 2006Sudden increase in RPM cured by depressing pedal?????
I was driving ('97 Explorer) at highway speed when I heard something under the hood very loudly and very rapidly increase in RPM. My first thought was the engine had slipped out of drive, but taking my foot off the accelerator had no effect and the RPM gauge was falling. When I applied accelerator pressure again, whatever was spinning rapidly returned to normal. When next I took my foot off the gas pedal, the same thing repeated. I applied gas very slightly and the spinning sound returned to normal. Sounds as if it's coming from under the hood. Can anyone propose what this might be? - Mike posible fan clutch >I was driving ('97 Explorer) at highway speed when I heard something >under the hood very loudly and very rapidly increase in RPM. My first [quoted text clipped - 10 lines] > >Can anyone propose what this might be? - Mike What would the relationship be between the fan clutch and the application of the gas pedal? - Mike >posible fan clutch >>I was driving ('97 Explorer) at highway speed when I heard something [quoted text clipped - 11 lines] >> >>Can anyone propose what this might be? - Mike the change in rpms. it could be on the verge of going bad. see what it feels like/ engine off & keys in your pocket. >posible fan clutch >>I was driving ('97 Explorer) at highway speed when I heard something >>under the hood very loudly and very rapidly increase in RPM. My first >[quoted text clipped - 10 lines] >> >>Can anyone propose what this might be? - Mike Fan does not turn smoothly either when cold or warmed up; should it spin effortlessly? - MIke > the change in rpms. it could be on the verge of going bad. see what it feels > like/ engine off & keys in your pocket. [quoted text clipped - 5 lines] > >> > >>Can anyone propose what this might be? - Mike not totaly effortless. but it should be a free smooth spin. you could spin the fan off & drive a short distance & listen to see if you still have the noise. you can remove the fan & clutch assy. and the pulley & belt will still stay in place. allowing you to test drive. >Fan does not turn smoothly either when cold or warmed up; should it >spin effortlessly? - MIke [quoted text clipped - 4 lines] >> >> >> >>Can anyone propose what this might be? - Mike worn transfer case brought on in part by uneven tire size - Mike >not totaly effortless. but it should be a free smooth spin. you could spin >the fan off & drive a short distance & listen to see if you still have the [quoted text clipped - 9 lines] >>> >> >>> >>Can anyone propose what this might be? - Mike |
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