fuel pump prolbems

epleyruger · Oct 6, 2013

got an 88 ranger with a 2.9 fi that was wrecked but ran. put a 89 front clip on it and now i have no power to my fuel pump. i checked for an inertia switch but it doesnt seem to have one. new fuel pump relay as well. just thought id ask u guys before i just wire the fuel pump to the battery with a switch :icon_thumby:

dave2575 · Oct 7, 2013

Totally guessing but... A bad or missing Ground wire? An unplugged or broken wire/s? How about the lack of an inertia switch, are the 2 wires that plug in to the inertia switch at least spliced together? Are they even there? If it was running before the new front clip was put on then it sounds like maybe something was overlooked or forgotten. Take a look at the old front clip and see if something was left on it that might need to be put on the new front clip. You know those "EXTRA PARTS".

Earl43P · Oct 7, 2013

http://www.therangerstation.com/tech_library/EDiagrams/files/Diagrams_ElectronciEngControls2_9_1of3.JPG

Click on that link and see what you are missing.

adsm08 · Oct 7, 2013

The computer's main ground is up on the radiator support. If you don't get that ground hooked up you don't get power for the fuel pumps. Make sure you connected the little wire on the batt - cable to the body.

epleyruger · Oct 7, 2013

thanks for the help guys......another no brainier for you guys does my truck have 2 fuel pumps

epleyruger · Oct 7, 2013

yet another question for u guys.........been doin some research tryin to figure out whats wrong with my truck and found this on justanswer.com

"Ok then I would have a hard look at the inertia switch and make sure the connector isnt burned, if it looks ok, then the 1988 had know issues with the PCM not grounding the fuel pump relay, when it dosnt start, run a ground wire to the fuel pump relay on the tan/green wire and see if the pump runs, if so you have a bad PCM.

can anyone validate any of this for me.........any help is greatly appreciated
:icon_thumby:

dave2575 · Oct 8, 2013

Yes, there are two fuel pumps the inline fuel pump (high pressure) witch is mounted inside the drivers side frame rail, and there is another fuel pump (low pressure) mounted inside your gas tank
And as for checking for a bad ground from the PCM to the fuel pump relay, Yes. I have heard of it being checked that way but I have never had to do it myself. All you do is put a jumper wire on the battery neg- terminal and the other end on the tan/green wire and turn on the ign. If that turns the pump on then there is a ground issue for the fuel pump relay, and only one reason for that issue... The PCM!

epleyruger · Oct 8, 2013

ok thanks man.........could i do this for a while as a temporary solution without hurting anything else on my truck?
:icon_thumby:

dave2575 · Oct 9, 2013

If you are using the jumper wire from batt. neg.(-) to the relays tan/green wire as a way to run the truck as you are diagnosing the real problem.. Then yes, sure you can do that without any worries. But I wouldn't want to try and leave my driveway with that band aid.

If you have another means of transportation use it, You don't want to take the risk of an electrical problem spreading and making things worse for you. If you had to run to the parts store or REALLY need it for work or something then I might consider what you originally wrote and direct wire the pumps to the batt. and a toggle switch. Remember these are just MY "opinions" not solutions.

epleyruger · Oct 9, 2013

ok thanks man........i droped the tank yesterday to make sure there the pump wasn't bad, it was still good. :icon_thumby:

so i think im just gonna wire the fuel pumps straight to the battery with a switch. thanks for the help i might have a few more questions for you guys in the next couple days if i can get a few pics posted up about stuff on my truck
:headbang:

dave2575 · Oct 10, 2013

Good luck with it, Let us now what ever you find out and how you fixed it. :icon_thumby:

Wiring the fuel pump to a relay and toggle switch.
http://www.therangerstation.com/forums/attachment.php?attachmentid=11884&stc=1&d=1381395134

OR... Universal Relay Wiring.
http://www.therangerstation.com/forums/attachment.php?attachmentid=11886&stc=1&d=1381413076

epleyruger · Oct 24, 2013

sorry it took so long to get back to you guys..............but another question for you guys there is 4 wires coming from the fuel pump in the tank, Orange,yellow/white, pink/black,grey/black. can any one tell me witch wires are my power wire and my ground? and im gonna put a in-line fuze in, what size should i use?

epleyruger · Oct 24, 2013

and something else....... there are 2 relays on the drivers side mounted together towards the front of the inner fender anyone know what they are

dave2575 · Oct 25, 2013

The pos+ wire on both pumps are the pink/black stripe, and the neg- ground wires are both solid black and come directly off the pumps. The other wires are for the fuel gauge and FP relay.
AS far as the 2 relays go I'm not sure, I looked in my truck and didn't see any relays on the drivers side inner fender. Do they look like there stock from ford(as in a colored plastic case and colored wires) or do they look like there a universal relay(black case and black, red, white, and green wires) If there universal you can probably follow the wires back to the source. Take a pic of the 2 relays and the wires.

epleyruger · Oct 28, 2013

looked at them relays they have a ford logo on both of them. could they be for the cruse control? l lost power to my spark plugs, ive got power through my coil to my distributor but thats where i loose my spark.......any thoughts. will a distributor of an 89 2.9 work on it? also got my fuel pumps wired up and when i kick them on they come then the pump bogs down like they are suppose to. how can i check to make sure ive got good fuel pressure?...........thanks guys

fuel pump prolbems

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