I recently purchased a 89 Ranger 2.9, 5spd, that has been sitting for 6 + years and hasn't been started. I put a new battery in it to see if it would crank over, cranks over fine. The fuel pump will not kick on when I hit the key, I put a new fuel pressure relay in and still nothing. I put a test light on the harness after I unpluged it from the tank and no power to it?? I can pour some gas in it and it will bust off and run until gas is gone. The scrader valve has no gas either to it, I poured about 4 gallons of gas in it also the tank was dry completely.

The inertia switch is not popped either........

Any help would greatly be appreciated!

 

The main relay powers just about everything under the hood including the pump relay & the ECM/computer (does your check engine light come on when you turn the key one click?)

Heres what you should see at the pump relay with key on and fuel pin grounded (see the link below).

http://www.superhighoutput.com/tech_view.php?id=5

Solid red wire from the main relay tan/light green, orange/light blue 12 volts

Solid yellow from the fuse link will have 12 volts at all times.

First thing is to ground the pin & check for voltage at the inertia switch

 

I will check it out this weekend........is there anything that can go out or fuse be blown else where, if I have power to the relay?

 

If the check engine light works one of the fuse links is OK

If you have 12 volts on the solid yellow wire at the pump relay the other fuse link is also OK.

BTW, in normal operation the ECM only grounds the pump relay for 2 seconds & times out each time you turn the key.

It's kinda hard to figure anything out in only 2 seconds.

Grounding the fuel pin keeps the circuit hot while you look for the problem.

Good luck with it.

 

I hooked up a VOM across the inertia switch wires on my '86 when diagnosing the fuel pump and the needle swung for about 2 seconds as the fuel pump tried to pressurize. That tells you the voltage is getting that far.

 

ok truck had full tank of gas drained tank with pump added fresh alc blend fuel ,truck starts and runs on a can of starting fluid but no fuel getting to rail . pulled the fuel pump relay and swaped it for one of the close ones in box no luck , put the relays back as they where . checked relay with ohm meter acrost the 2 pins . closed there . ckecked the place it plugs in to with volt meter by inserting pins in the 2 slots no power there im i checking it right . checked the fuel kill switch in cab it was pressed down on top . eny help what did you do to fix your truck jim

 

ok on my 89 ranger the big power fuses are in black box on left side facing truck,the relays are under them hanging upside down ,how do they come out ,and how do i know the ones that run the fuel pump ......looked like 4 relays in there . 4cyl. stick shift ......jim need help guys