carburetor problems
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Freshman User
Joined: Sep 2005
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carburetor problems
hey guys, i have an '84 f150 with the 300 inline six with a carburetor. This truck (unfortunetly) has electronic feedback to the carburetor. It also has an EEC module.
Anyway, there is a kind of piston that sits behind the throttle to adjust the idle speed even though my carb has an idle speed adjustment screw. This piston is electrical and comes from the EEC module.
I just put hedders on the truck, so i took out my whole thermactor system (smog pump,etc...) and this piston causes me nothing but troubles (high and variating idle speed).
Finally, here's the question. Can i take this so-called piston and just let it hang somewhere not to touch my carb (to disable its functions) or will it screw up something else??? I hate the thing, it really doesn't look useful other than to cause problems.
Anyway, there is a kind of piston that sits behind the throttle to adjust the idle speed even though my carb has an idle speed adjustment screw. This piston is electrical and comes from the EEC module.
I just put hedders on the truck, so i took out my whole thermactor system (smog pump,etc...) and this piston causes me nothing but troubles (high and variating idle speed).
Finally, here's the question. Can i take this so-called piston and just let it hang somewhere not to touch my carb (to disable its functions) or will it screw up something else??? I hate the thing, it really doesn't look useful other than to cause problems.
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Elder User
Joined: Oct 2004
Posts: 556
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From: Ridgeway, Virginia
Are you refering to the idle speed motor? This is a cylinder shaped, electrical device mounted near the throttle linkage. Normally it is used to bump up the idle speed when the air conditioner is turned on in order to keep the engine from stalling. As far as I know it would not hurt to remove it unless you have a working A/C. If I removed it I would completely remove it. Not just relocate or leave hanging.
Logistics Pro
Joined: Apr 2005
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I had an '85 with that feedback carb, what a piece of junk, (the carb, not the truck. 
) I just went and bought an older carb without the feedback junk and that was the end of my carb problems.
Of course, whenever the truck was due for smog I'd have to put the feedback carb back on for a short while....
) I just went and bought an older carb without the feedback junk and that was the end of my carb problems.Of course, whenever the truck was due for smog I'd have to put the feedback carb back on for a short while....
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