Engine Run-on.
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Joined: Jul 2003
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From: the great northwest
Engine Run-on.
please help me...my 79 f-150still sounds like it is on even after the motor has been turned. it is not as loud as if it were on but it sounds maybe like a fuel system. any advice for me ?? also does anyone have a wiring manual for this year?? i would really appeciate it! thank you for taking the time to read and respond to this
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Joined: Feb 2003
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Engine Run-on.
The coughing and sputtering is called dieseling. Try reducing the idle speed. Should be a little set screw on the throttle linkage on the driver's side of the carb. You may have to remove the air cleaner to see it. If the idle speed is too high the motor sucks in a little gas and the heat of compression ignites it.
On a 79 there might also be a dash pot that opens the throttle to idle during run and closes the throttle blades completely when the engine is turned off. Look for a cylindrical object with a plunger that acts as a throttle stop on the driver's side of the carb.
On a 79 there might also be a dash pot that opens the throttle to idle during run and closes the throttle blades completely when the engine is turned off. Look for a cylindrical object with a plunger that acts as a throttle stop on the driver's side of the carb.
Posting Guru
Joined: Aug 2002
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From: Canada
Engine Run-on.
I think I'll hi-jack this thread.
My truck sputters when I turn it off, and I understand its a carb setting. I was at CT the other day and I saw a carb adjuster tool. Do I need one of these or will a regular screw driver work fine?
Chado
My truck sputters when I turn it off, and I understand its a carb setting. I was at CT the other day and I saw a carb adjuster tool. Do I need one of these or will a regular screw driver work fine?
Chado
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Laughing Gas
Joined: Jan 2002
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From: Tucson
Engine Run-on.
Might as well highjack it because it seems to have run out of steam anyhow. Re a carburetor adjusting tool, you don't need one. A long thin screwdriver works fine on stock carbs.
jor
jor
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Engine Run-on.
I have a little screwdriver with about a 3" blade and 4" handle I use for carb adjustment. I found it under the hood of a car when I was 15. It didn't belong to the car owner so I kept it. Some mechanic somewhere lost a friend.
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