There should be a label in and out. In or inlet should go to the tank side and out or output to engine.
Then just test it by connecting a hose on each end of the pump and submerging hoses in a container with fuel and see which side sucks the fuel, that side goes to the tank
I have a '91 F-250 and my external pump is by Bosch, frame mounted under the drivers side and the WIRED END is the OUTFLOW.
Which way does the inline fuel pump work wire end towards front or back
1988 Ford F-150 S Standard Cab 4WD LB
-
Maintenance & Repair
My truck won’t start unless you jump the cylinoid also won’t stay running dies and when I press on the gas it bogs and won’t go faster what’s wrong
1988 Ford F-150
-
Maintenance & Repair
I have a 1998 Ford F-150. It was transported. Started fine when loaded on trailer. Now it won't start. Was told probably the fuel pump kill switch and it needs to be reset. Where is it? Thanks!
1998 Ford F-150
-
Maintenance & Repair
Hello, I have a 1988 Ford F-150. The truck was running fine but now it won’t start. I recently replaced the Battery, starter solenoid, the radiator, the battery pos/neg cables, and the alternator...
1988 Ford F-150 XLT Standard Cab 4WD SB
-
Maintenance & Repair
I have fuel and spark no fire crank and nothing have fuel in to injection rail
1988 Ford F-150 S Standard Cab 4WD LB
-
Maintenance & Repair
CarGurus has 13,812 nationwide F-150 listings starting at $3,800.
Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.