1992 f250 fuel pump
Trying to perform a compression test on a 92 f250 with the 351. Haynes manual says to disable the fuel circuit. Need to know how to do this. Thanks!
|
Welcome to the site..
Couple ways you can cancel the pump,, Out in the engine compartment fuse box you can just remove the fuel pump relay, or, remove the EEC/computer relay (it supplies power to the fuel pump relay) or remove the fuse/s for either power distribution for these relays. Don't remember the positions, but there 20amp/yellow fuses 'hot at all times'.. There's also a gray color EEC power diode there, if that's removed it will kill power to the EEC power relay.. Can't remember,, but i think the relay position is noted on the underside of the box lid. Last, you can unplug the connector on the inertia switch located in the right/upper kick panel.. |
I used what I thought was a simple way to disable the fuel pump.
With the engine running give that inertia switch a sharp rap with your hand and you will hear it trip and almost immediately the engine will stop running due to the lack of fuel . The fuel pump is now prevented from working. When done with whatever you are doing reset the switch and you're ready to go. I believe your inertia switch for F series should be located at the center of the dash on the transmission hump or near the steering column. |
Thanks guys I appreciate it. I just pulled the fuse and it was good to go. The cylinders tested at around 100-125 psi. They started at around 30 and worked there way up with each crank. I know this means the rings are most likely bad. The truck is more of a beater and I wanted to make sure that it didn't have any compression problems
|
All times are GMT -5. The time now is 06:26 PM. |
© 2024 MH Sub I, LLC dba Internet Brands