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Old 07-23-2007, 08:21   #1 (permalink)
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confused Engine Dies ONLY before normal operating Temp.

I have an '87 F250, and recently the truck runs fine when the choke (if that's what its called after startup!) is on. While driving, the window between the high idle mode and up to the full operating temperature mode the truck will stall as soon as the clutch is depressed. It will not rest at the idle position unless you actually allow the transmission to bring the idle down while coming to a stop or without depressing the clutch until the idle is at or near normal rate. Once the truck is WARM and at normal operating temperature there is no such problem and everything reacts as it should. Does anyone have any advice or guess at what could be wrong?
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Old 07-23-2007, 19:47   #2 (permalink)
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Re: Engine Dies ONLY before normal operating Temp.

Sounds like either a mis-calibrated electric assist choke or a mis-adjusted choke pulloff. If the choke butterfly is pulled back too far before the engine is warm, it will stall. You'll need a manual to get the right adjustments on these two parts.
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Old 07-23-2007, 20:10   #3 (permalink)
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Re: Engine Dies ONLY before normal operating Temp.

I have a manual to look through for these 2 parts. If it solves the problem I'll keep you posted............
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Old 07-23-2007, 22:17   #4 (permalink)
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EFI motor?

if it is its your fuel filter. If it has a carb you likely need to give it an overhaul or at least adjust the choke. I thought 86 was the last carbed year. I had an 86 F250 with a 351w carbed 4bbl. Maybe the 460's still had carbs. Give more info.
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Old 07-25-2007, 13:28   #5 (permalink)
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Re: Engine Dies ONLY before normal operating Temp.

Sorry I should have mentioned it is a 6.9l diesel!
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