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5.0L General Discussion This section is for non-tech specific information pertaining to 5.0L Mustangs.

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Old 08-03-2013, 08:38 AM   #1
88 sleeper
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Angry throttle stticking

I have a 1988 GT anytime i would go over 3,000 rpm the thottle would get stuck and the engine would rev at high rpms. I would shut the car down coast it in neutral while pumping the gas pedal then I start it and it would be fine. Soooo I changed the throttle cable and now it's worse what should I check next don't know what it could be?
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Old 08-03-2013, 08:49 AM   #2
dawson1112
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Could you get a pic of your throttle cable linkage at the throttle body?

Does your car have cruise control on it? sometimes that cruise cable is not adjusted properly, ( I doubt its the case here but its worth checking )

With the car off get under the hood and work the throttle manually and watch what happens when you suddenly release it. does it close all the way?
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Old 08-03-2013, 02:04 PM   #3
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I disconnected the cruise cable to see if it made a difference but same thing
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Old 08-03-2013, 02:09 PM   #4
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Pull your throttle body and make sure the little screws that holt the throttle plate to the arm are not loose or , worse broken.... Some one on here a few months ago sucked one of those screws into the intake and down a cylinder . if they are loose or broken the throttle plate could be getting hung up.
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Old 08-03-2013, 02:21 PM   #5
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While you have the tb off clean it and the iac valve.
If there is nothing catching the cable or linkage and all your springs are there to pull it closed and you throttle plate is intact, it would have to be at the pedal someplace
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Old 08-03-2013, 02:45 PM   #6
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tried taking off the throttle body but it is not budging,tried tapping with rubber mallot still will not come off
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Old 08-03-2013, 02:49 PM   #7
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do you have any tricks on how to take it off without damaging the plenum
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Old 08-03-2013, 03:54 PM   #8
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Quote:
Originally Posted by dawson1112 View Post
Pull your throttle body and make sure the little screws that holt the throttle plate to the arm are not loose or , worse broken.... Some one on here a few months ago sucked one of those screws into the intake and down a cylinder.
Lol, I remember that. It was the other Mod on here besides Mjr.

Quote:
Originally Posted by 88 sleeper View Post
do you have any tricks on how to take it off without damaging the plenum
You took the nuts off first, right? Put some *** into it, a lot of times the hardware can be rusted a bit.
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Old 08-03-2013, 04:17 PM   #9
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Yea hit the thing, I don't like rubber mallets unless they are the dead blows with sand inside them. But if you have a rawhide mallet or even a small block of wood to put on it. You can use a small ball peen and hit the block of wood.

If its really stubborn resort to the tried and true thin flat blade and tap it into the crack where they meet.
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Old 08-03-2013, 07:30 PM   #10
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is the blade rubbing the housing? alot of bbk;s do this
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Old 08-03-2013, 07:30 PM
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