New Guy needs some assistance...
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New User
Joined: Jan 2014
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New Guy needs some assistance...
...in diagnosing his truck.
I have an '86 Ford F(350?) stakebed pickup truck. This vehicle has two fuel tanks, and the main tank needs a fuel pump replaced.
Where is the fuel pump (main) located? Is it in the tank or under the hood? Is it hydraulic or electric? Is it user-replaceable or do I need a factory tech to do the job?
The next gremlin is with the starter. I just replaced the starter with a new unit about a month ago. The starter doesn't let me know when the truck has finally started - it's a crap shoot whether or not to stop putting the key in the Start position and let it run. Sometimes it runs just fine, sometimes it hasn't started, and sometimes it backfires because I've nearly flooded the carburetor with fuel.
Help would be appreciated. I'm new to Ford trucks, but not new to cars - I'd rather not get into a flamefest, so I won't mention which cars I know well enough to rebuild without the manual.
I have an '86 Ford F(350?) stakebed pickup truck. This vehicle has two fuel tanks, and the main tank needs a fuel pump replaced.
Where is the fuel pump (main) located? Is it in the tank or under the hood? Is it hydraulic or electric? Is it user-replaceable or do I need a factory tech to do the job?
The next gremlin is with the starter. I just replaced the starter with a new unit about a month ago. The starter doesn't let me know when the truck has finally started - it's a crap shoot whether or not to stop putting the key in the Start position and let it run. Sometimes it runs just fine, sometimes it hasn't started, and sometimes it backfires because I've nearly flooded the carburetor with fuel.
Help would be appreciated. I'm new to Ford trucks, but not new to cars - I'd rather not get into a flamefest, so I won't mention which cars I know well enough to rebuild without the manual.
FTE Legend
Joined: Jul 2010
Posts: 32,875
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From: Northeast, OK
Welcome to FTE! We may need to know what engine you have since I'm not sure all the '86 engines got electric pumps. The parts catalog indicates that at least some of the 83-86 250's and 350's with the 460 got electric pumps, but I tend to think that some of them had mechanical pumps. So, which engine?
But, even if electric there will be one in each tank and you can replace them by lowering the tank. Usually the all-thread that holds the tanks in allow the tank to come down enough to get to the pump w/o taking the tank out.
But, it doesn't sound like you have a starter issue, just that the engine isn't lighting off well and you don't know when it is running. Right? If so, maybe you need a tuneup, or fixing vacuum leaks.
But, even if electric there will be one in each tank and you can replace them by lowering the tank. Usually the all-thread that holds the tanks in allow the tank to come down enough to get to the pump w/o taking the tank out.
But, it doesn't sound like you have a starter issue, just that the engine isn't lighting off well and you don't know when it is running. Right? If so, maybe you need a tuneup, or fixing vacuum leaks.
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New User
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Thank you for the response. I think I have the 460 motor in the truck. The first thing I did when I got the truck was change the plugs, rotor and cap. Perhaps timing might be an issue, but not quite sure how to set timing on this motor yet.
I'll take a look around for vacuum leaks. Anyone have a vacuum diagram?
You're saying that IF I have the 460 engine, it most likely has an in-tank electric pump?
If this has an electric pump, I can simply lower the tank and not have to remove it entirely in order to replace the pump?
I'll take a look around for vacuum leaks. Anyone have a vacuum diagram?
You're saying that IF I have the 460 engine, it most likely has an in-tank electric pump?
If this has an electric pump, I can simply lower the tank and not have to remove it entirely in order to replace the pump?
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
I'm not saying it will likely have an electric pump as the 460 isn't my area. But Jim or someone that knows should be along soon to answer. However, if you don't have an engine-mounted mechanical pump it must have electric pumps. Have you looked on the driver's side front side for a pump? Follow the fuel line from the carb down to a pump?
You should have timing and vacuum info on the panel just ahead of the radiator, passenger's side.
You should have timing and vacuum info on the panel just ahead of the radiator, passenger's side.
Moderator
Joined: Nov 2007
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From: Denver Metro Area, CO
This could also be a Cab & Chassis model which are different in certain areas (fuel system being one of them)...
Gregory - it would help if you could post a picture of the Certification label on the driver's side door jamb....
Gregory - it would help if you could post a picture of the Certification label on the driver's side door jamb....
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