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Jan 20, 2021 | 06:02 PM

Madnessmotors

Thread Starter

New User

Joined: May 2020

Posts: 2

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Help please!

Hi all, first post but happy to be here. We have a 1995 F150 XLT, 302/5 liter, 4x4. We put in a new aod transmission, and it works. It has dual fuel tanks. The front one does not work. We were using the rear tank. One day the truck just died. We didn't hear the fuel pump and couldn't get it to work so we replaced it. Truck did the same thing. It starts just fine, but once it warms up, it will die if you step on the gas past about 1/4 down. We have been trying to eliminate the problem, but after replacing the fuel cutoff switch, the egr valve, O2 sensor, Mass Airflow sensor, fuel filters, and cleaning everything out thoroughly. But the problem still exists. We let it run and warm up idling yesterday and now it died on its own without even moving it. We're trying to check connections everywhere. We even jumped the fuel pump to make it run, and we could hear and feel the pump running, but the motor would not start. We're going crazy! Would love any advice anyone has. If you have questions about it please let me know.
Thanks! Mauro @ Madness Motors Albuquerque

Jan 20, 2021 | 11:03 PM

Lime1GT

Fleet Mechanic

Joined: Jul 2010

Posts: 1,354

Likes: 31

From: Winnipeg

Check for engine codes. Check fuel pressure; Engine Running- 28-45psi. Key On Engine Off- 35-45psi. Check for TSB 95-15-11 regarding intermittent hesitation/stumble/miss/stall/no spark. check your vacuum hoses. check your pcv valve for stuck open.

Jan 21, 2021 | 09:51 AM

WWR

Cargo Master

Joined: Dec 2015

Posts: 2,920

Likes: 515

Agree look for codes. Also agree definitely need a fuel pressure test before going too far down any other rabbit hole

Your symptoms could also be TPS or O2 (codes will call it HEGO)

I doubt PCV would cause your issue but stuck EGR maybe