4.9 revs up
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4.9 revs up
my truck has been doing this for a while. first off its a 1990 f150 4.9l with a 5spd manual 4x4. my problem is that when i am driving, doesnt matter whether its cold or warm, when i push in the clutch sometimes to shift it wants to rev up around 3500 rpm. sometimes it will come back down to normal rpms, but sometimes it just stays right around 3500- 4000 rpm range. what could be causing this?
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i didnt see where it looked like anything was fraying. there are 2 cables coming off my tb one goes into the firewall the other goes into a big cannister looking thing, what is this cable for? they both hook to the same linkage.
Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
That's the cruise control.
Since you're talking about the throttle cables under the hood, I'm just making sure you didn't misunderstand me - I was talking about where the cable goes into the guide behind the pedal.
Since you're talking about the throttle cables under the hood, I'm just making sure you didn't misunderstand me - I was talking about where the cable goes into the guide behind the pedal.
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yeah thats where i looked first, but didnt see anything so i looked under the hood. could this be a tps problem? i know i dont want to try and fix it by just buying a bunch of new parts, i tried that already on my intermittent wipers and it cost to much money to do that.
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Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
In order to rev that high it needs air and fuel. It's got to be throttle or linkage related. If the cable is working OK, do the throttle plates move freely? Any chance you can take the throttle body off and clean it out real good?
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