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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

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Old Dec 30, 2015 | 07:00 PM
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No idle

On my 86 ford with a 300 inline 6, will start and run, but if I let off gas it dies won't idle, does it everytime, start then dies unless I keep it Rev up. Any ideas were to start thanks
 
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Old Dec 30, 2015 | 07:28 PM
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EFI or carb? Most likely a feedback carb but need to ask....
 
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Old Dec 31, 2015 | 03:48 AM
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Its a Carb
 
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Old Dec 31, 2015 | 03:51 PM
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Vacuum leak, stuck EGR valve, idle speed too low, are a few things.
 
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Old Dec 31, 2015 | 04:24 PM
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Originally Posted by Farris76
On my 86 ford with a 300 inline 6, will start and run, but if I let off gas it dies won't idle, does it everytime, start then dies unless I keep it Rev up. Any ideas were to start thanks
pcv valve, fuel filter or fuel pump could be culprits as well, cheap and easy parts to replace..although I would suggest adjusting the idle on the carb straight away..that's free!
I have the 300 i6 with the same carb and it took me lots of time to get the idle right.. I also had to replace my fuel pump and filter recently..the difference in acceleration and idle was very noticeable
 
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Old Dec 31, 2015 | 05:42 PM
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Thanks

I'll check those things in morning maybe a easy fix, I thought maybe throttle position sensor but haven't got one yet so I'll try the ideas first thanks gentlemen
 
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