1986 efi
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Joined: Apr 2007
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1986 efi
I have a 86 5.0 efi runs good then takes a dump on and runs good a gain right now. after startup it will stay at high idle and while going down the road it feels as though the motor has killed until i get below 35 mph or put it in neutral it runs fine. I have a new ditrbutor and module. in park i can rev it all day. what could it be.
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Joined: Jan 2001
Posts: 56,965
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From: Virginia
Read the codes and see what it has to say. Here's a site that tells you how to do it with a voltmeter or testlight.
www.fordfuelinjection.com
www.fordfuelinjection.com
Posting Guru
Joined: Nov 2004
Posts: 2,155
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From: sunny fla sometimes windy
Gas line dryer triple dose or so don't do anything else just dump it in on whatever is in
the tank3/4 1/2 1/4 run it until 1/8 tank then refill with fresh fuel and some marvel
mystery oil and another bottle of iso heet. Unless that is too easy for ya.
the tank3/4 1/2 1/4 run it until 1/8 tank then refill with fresh fuel and some marvel
mystery oil and another bottle of iso heet. Unless that is too easy for ya.
Senior User
Joined: Feb 2008
Posts: 122
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From: El dorado, Arkansas
Does the truck have dual tanks? If so there are actually 2 fuel filters on the truck. The usual one that is easy to find and see. The other is by the valve that swaps what tank you are using under the truck. It is on the drivers side on the frame rail. The filter is about $4. We chased a similar problem for weeks because we were unaware of this filter. Good luck, hope it is something simple.
Senior User
Joined: Jul 2007
Posts: 432
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From: Germantown, MD
Originally Posted by brthevio
Does the truck have dual tanks? If so there are actually 2 fuel filters on the truck. The usual one that is easy to find and see. The other is by the valve that swaps what tank you are using under the truck. It is on the drivers side on the frame rail. The filter is about $4. We chased a similar problem for weeks because we were unaware of this filter. Good luck, hope it is something simple.
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