So I was going to search and read up before asking questions, but there doesn't seem to be a search function on this forum.

I have a rusty old beat up 88 B2 (with no brakes) that I plow my driveway with and nothing else. It decided to stop running. I was pretty sure it was the fuel pump (in tank.) I checked for voltage at the connector and it was fine so I replaced the pump. New pump works and pumps gas out of the tank but the thing still won't start. Now I hear there's a second pump in-line. What are the odds of both going bad at the same time? Would the failure of one cause the other to burn out? Is it possible it could have run with one working and one bad? Do they use seperate relays? When I jump the fuel pump test lead, I only hear one relay click. I don't have a fuel pressure gauge, but I disconnected the regulator and jumpered the pump and there was no fuel flow. I also squirted gas into the intake and it fired right away so I know there isn't something else like ignition that's bad. I know it's going to start snowing soon, and I have a bad back and can't shovel so I really need to get this beotch running. I suppose tomorrow I'll just jack 'er up and test the second pump.

Thanks in advance for any help you can provide

 

Check this thread:
https://www.ford-trucks.com/forums/5...nt#post4107835

 

In tank is low volume and truck might start okay with a bad one, the one in the fuel rail is high pressure and the vehicle will not start without it. On some vehicles, it is just the fuel pump relay (high pressure) that is bad.

 

Does the high pressure pump have a seperate relay from the one for the low pressure pump? If so, where is it located? We got over 6" of snow today so the trucks buried in the yard now. I'm hoping it melts off this weekend and I can drag it into the garage and look at it again. I had to spend today getting my rusty old beat up snowblower going so at least I don't have to shovel.

 

No, the wiring diagram shows only one pump relay and the 2 pumps are spliced to it..

Since the tank pump is working, theres only 2 things this can be a bad high pressure pump or a break in the wiring to it.

Try giving the pump a whack with a "Ford wrench" & see if that gets it going.

 

I have an '88 Bronco 2 that I bought new. It has been a great vehicle and had never failed to start until 2 weeks ago. It would fire for a second and then nothing. I checked the ignition and it was fine, but there was no fuel in the fuel rail. So I checked the wiring, the relay, and the reset switch and they are working fine. Since I get an immediate fire and I can hear noise from the back I assume I am getting a low pressure prime--is the in-tank pump the low pressure pump???? I am assuming (uh-oh) that the problem is with the high pressure pump--does that make sense?? Is the pump on the frame the high pressure pump?? I am am like sdort (bad back) so I'd prefer to know more before I go dropping the tank or messing with the frame (lot of salt rust from being in every snow and ice storm for 18 years). Anybody care to comment??

 

By the way--is the high pressure pump that's on the frame back by the tank or up by the left front wheel?

 

its up under the by the drivers door. i wonder if your low pressure pump went the lack of fuel cooling the high pressure pump might of casused it to go to i would pull it out and test it befor buying a new one. also on mine the is a black ground for the fuel pumps up by the battery the conector on mine came lose and it wouldnt start

 

I climbed under my 88 B2 yesterday to check wiring and the fuel pumps. I took the high pressure pump loose from the frame to gain access to the wiring. I pulled the connector apart and checked for ground and for 12v coming in and it was there. I jumpered 12v directly to the pump and it worked great, so I made a pair of jumper wires to check voltages and grounds. Everything checked out--2 second prime ran both the front and rear pumps, confirming the relay was OK. So, I tried to start it and it fired right up. Makes no sense, but the only think I can think of is I had a rusty connection or loose wiring. Now the only problem is the fuel gauge doesn't work--dead.