Fuel not circulating proper
Thread Starter
|
New User
Joined: Apr 2012
Posts: 6
Likes: 0
Fuel not circulating proper
I just bought and installed a new fuel pump on my 1987 f-150 305 5.0 and still no fuel is reaching the engine.
The truck was cranking just fine then I let it sit for a year and now it doesn't crank?
The truck was cranking just fine then I let it sit for a year and now it doesn't crank?
Senior User
Joined: Mar 2012
Posts: 153
Likes: 0
From: Bermuda Dunes, CA
Welcome. Do you know if your pump is running? or even getting power? Do you hear it running, wont be very loud but still make noise, also your rig has multiple pumps, one in each tank (low pressure) and a frame rail mounted one (high pressure). You can ground I believe its pin 6 of the diagnostic harness to manually trigger the pump relay and power all the pumps, and see if you get and fuel then. I'm sure a more senior member will chime in shortly with a diagram of the connector and which pin to ground. Do you have multiple tanks, if so does it get fuel from either one? Which of the 3 pumps did you replace?
Thread Starter
|
New User
Joined: Apr 2012
Posts: 6
Likes: 0
Thanks Cletus Snow, I didn't see but one big long fuel tank up under and the fuel pump was connected on top which ran inside the tank. I bought a cheaper fuel pump and filter from auto zone and rebuilt it around the old connectors. Should I do a do a diagnostic with an electric light to see if anythings burned or corroded?
Senior User
Joined: Mar 2012
Posts: 153
Likes: 0
From: Bermuda Dunes, CA
First test to see if you're getting electricity to the pump, at the tank connector, if you are, then pull your pump out and make sure you spliced the connections properly, if its not right, make it right. What led you to believe it was the fuel pump, or even this pump? If you have two fuel fillers, you have 2 tanks, the long drivers side mounted one and one between the frame rails, behind the rear axle, and above the spare tire, just would hate for the switch to be set to draw off the rear tank if you're working with the front...
Thread Starter
|
New User
Joined: Apr 2012
Posts: 6
Likes: 0
Trending Topics
Senior User
Joined: Mar 2012
Posts: 153
Likes: 0
From: Bermuda Dunes, CA
An 87 has 3 pumps, one in each tank (low pressure), sometimes called a lift pump, and then another mounted on the frame rail around the fuel filter, (high pressure). Why do you ask? Whats going on?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Senior User
Joined: Feb 2012
Posts: 177
Likes: 0
From: Grants Pass, OR
Check the link in my signature for fuel system info and OBD1 test connector info.
Ill post when I get results.
Thread
Thread Starter
Forum
Replies
Last Post
Coverbrooke
Fuel Injection, Carburetion & Fuel System
7
Apr 13, 2012 06:54 AM