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1989 318 TBI High Idle and Cold Stalling

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Old Nov 26, 2025 | 07:03 PM
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eklund027
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Default 1989 318 TBI High Idle and Cold Stalling

Hi I have a 1989 W150 with a 318 la

Completely stock and untouched 318 tbi that I believe it all original from the factory

It has always had issue with stalling in the cold but now it has gotten much worse, stalls when warming up if you try to take off from a stop. If you start it and put it in either drive or reverse it will stall the second you touch the gas

Now the new problem it decided to create is an extremely high idle, probably twice the rpms it should be, enough to make it shake when you shut it off, idles at 27mph according to a speed sign and the speedometer

Not sure what this is; any help would be appreciated.
 
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Old Nov 28, 2025 | 10:02 AM
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Could be the idle motor or a fuel issue. How many miles on it?
 
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Old Nov 28, 2025 | 12:35 PM
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Originally Posted by Moparite
Could be the idle motor or a fuel issue. How many miles on it?
124k, found out it was the idle motor
 
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