Revving Like Mad
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From: The Great White North
Revving Like Mad
My 1990 F150 has been revving up like mad. I touch the gas a little more than idle and it revs up like crazy. I push a little more and it starts to arc like crazy. I think it might be a chip but I can't figure out how.
It is such a strange problem. At first it seems like the clutch was slipping but it does this in neutral as well. Any ideas. I get 15kph in first gear and 50kph in 3rd.
I changed the IEC, tested the alternator, mad sure the MAP sensor hose was clear and tested a couple of other elctrical devices that I can't remember the name of now.
I think this is a chip because it just sort of happened one day. It didn't gradually build into something and it hasn't got worse. Like my right upper and lower ball joints.
Thanks for any input
It is such a strange problem. At first it seems like the clutch was slipping but it does this in neutral as well. Any ideas. I get 15kph in first gear and 50kph in 3rd.
I changed the IEC, tested the alternator, mad sure the MAP sensor hose was clear and tested a couple of other elctrical devices that I can't remember the name of now.
I think this is a chip because it just sort of happened one day. It didn't gradually build into something and it hasn't got worse. Like my right upper and lower ball joints.
Thanks for any input
Last edited by purplepirate; Feb 25, 2003 at 10:00 PM.
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From: The Great White North
Revving Like Mad
[QUOTE]Originally posted by big_saxy
[B]Does it rev high when cold only or at all temps?
Actually come to think of it. IF it is really cold it is fine. Then after 50 feet down the road it starts up. ]
[B]Does it rev high when cold only or at all temps?
Actually come to think of it. IF it is really cold it is fine. Then after 50 feet down the road it starts up. ]
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Joined: Aug 2002
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From: BC, Canada
Revving Like Mad
Could it be that is just sounds like it's revving up but really isnt?
I'm thinking that maybe the clutch fan is seizing which makes the engine really roar when you give it some gas.
I'm thinking that maybe the clutch fan is seizing which makes the engine really roar when you give it some gas.
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From: Newmarket, Ontario, Canad
Revving Like Mad
My '89 F150 4X4, 302 5-speed is doing the same thing. It used to rev high only when cold, but started doing it all the time one day.
My motor also sounds like it's revving through the roof, but the revs aren't that high.
How does one check a clutch fan? I'm definately not a mechanic.
Thanks.
My motor also sounds like it's revving through the roof, but the revs aren't that high.
How does one check a clutch fan? I'm definately not a mechanic.
Thanks.