stuck throttle?
Postmaster
Joined: Oct 2008
Posts: 3,026
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From: Renton, WA
Vacuum Leak!
Something has come loose. You say this is a carberated truck. That makes thing simpler.
Is the carb bolted down tight, they do come loose, is it the holley, they break?
Plug all the vacuum lines one at a time until the engine slows down.
Something has come loose. You say this is a carberated truck. That makes thing simpler.
Is the carb bolted down tight, they do come loose, is it the holley, they break?
Plug all the vacuum lines one at a time until the engine slows down.
Postmaster
Joined: Oct 2008
Posts: 3,026
Likes: 0
From: Renton, WA
Ouch! Those screws are swedged after they are installed. This makes fixing the carb rather tricky I recommend you find those heads then take the carb to a good carb shop so the shaft and those bolts can be repaired properly.
Postmaster
Joined: Oct 2008
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From: Renton, WA
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Posting Guru
Joined: Apr 2005
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From: Hawkeye Country
The screws are copper, they were more then likely pulverized within a second or so of going in the engine, if its still running fine I wouldnt let it bother me.
I ended up rebuilding my engine about 40,000 miles later, for other reasons, and never did see any sign of the screws.
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The exact same thing happened on my 86 F150, 351 4V. Started it one day and it revved to the moon, shut it off and looked every thing over and it all looked fine. Pulled the carb off and one of the secondary butterflies fell out and landed on the ground.
The screws are copper, they were more then likely pulverized within a second or so of going in the engine, if its still running fine I wouldnt let it bother me.
I ended up rebuilding my engine about 40,000 miles later, for other reasons, and never did see any sign of the screws.
The screws are copper, they were more then likely pulverized within a second or so of going in the engine, if its still running fine I wouldnt let it bother me.
I ended up rebuilding my engine about 40,000 miles later, for other reasons, and never did see any sign of the screws.
Posting Guru
Joined: Apr 2005
Posts: 2,246
Likes: 2
From: Hawkeye Country
Hey no problem man.
If you ever take a screwdriver to one of them screws you'll see how they smush if you don't turn them just right. They're really soft, not really any chance that they could do anything to bad to an engine. Happened to the 302 in a buddy of mines Mustang as well. That was a few years and it still runs fine, hes never had it apart.
I ended up fixing my carb using a couple screws I robbed of the base of an old holly I had in my garage. I just drilled what was left of the broken screws out, stuck the "used" in and smushed the bottom of them a little so they wouldn't work their way back out. The carb worked just fine for another 40,000 miles or so until I replaced it with a better one when I rebuilt the engine.
If you ever take a screwdriver to one of them screws you'll see how they smush if you don't turn them just right. They're really soft, not really any chance that they could do anything to bad to an engine. Happened to the 302 in a buddy of mines Mustang as well. That was a few years and it still runs fine, hes never had it apart.
I ended up fixing my carb using a couple screws I robbed of the base of an old holly I had in my garage. I just drilled what was left of the broken screws out, stuck the "used" in and smushed the bottom of them a little so they wouldn't work their way back out. The carb worked just fine for another 40,000 miles or so until I replaced it with a better one when I rebuilt the engine.
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