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86-87 F-150 5.0 help

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Old Nov 14, 2017 | 09:03 AM
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86-87 F-150 5.0 help

I have a 1986 F-150 Lariat with a 5.0 EFI, truck was manufactured 8-86. Truck was a Factory recall for Ground wire. Have finally got all ground wire problem fixed, I hope. Replaced 2 fuel pumps, 1 - Inline, 1 - in tank, bypassed rear tank. Problem did tune-up truck would not start after, replaced Distributor with 1 for a 5.0, truck wires up like a 5.8 351, was told they may have replaced cam. Truck runs but is not getting enough fuel, good fuel pressure, its in the injection system. Do I need to put a High Output distributor in it & do I need to change computer, it needs to be replaced, but do I need a different part #. Any input would be Greatly Appreciated, Thank You !
 
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Old Dec 17, 2017 | 10:34 PM
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Make any headway on this ?
 
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Old Dec 25, 2018 | 06:56 PM
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Hallo,
I have a 1986 F-150 5.0L 302 Windsor (fuel injection). The engine will start up fine when cold but will not restart after switched off when the engine is warm. Not sure if that is related but the engine is idling always high (between 1000-2000).
Thanks for helping,
Walter
 
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Old Dec 25, 2018 | 07:53 PM
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I'd say you need to look into the high Idle.
Have you checked for vacuum leaks ?
 
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Old Dec 25, 2018 | 08:05 PM
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ok, I will look into it. Thanks for responding
 
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Old Dec 25, 2018 | 08:18 PM
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Originally Posted by WalterHafner
ok, I will look into it. Thanks for responding
Check all your vacuum hoses.
Check your vacuum tree for cracked rubber caps and cracked hoses.
You can use starting fluid, spray around all your vacuum hoses, and intake manifold gasket seams, if the idle raises higher, you found your leak.
 
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Old Dec 25, 2018 | 08:22 PM
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Check your Throttle Plates to see if they are all the way closed.
When you get the chance, check the ECA/computer for Fault Codes.
 
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Old Dec 25, 2018 | 08:27 PM
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Thanks for helping! Do you think the non start when the engine is warm is a related issue to the high idle?
 
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Old Dec 25, 2018 | 08:28 PM
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duplicate post removed
 
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Old Dec 25, 2018 | 08:29 PM
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Originally Posted by WalterHafner
Thanks for helping! Do you think the non start when the engine is warm is a related issue to the high idle?
Could be related to the reason you have a high Idle...
 
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