The relay for the fuel pump keeps going bad. Is this a sign my fuel pump is going ? I just replaced my 2nd relay ( lasted about 1 week ) 1st lasted 16 years. Or is there another issue to look at ?
View 11 Replies01 7.3. Cranks, won't start. Tank was at 1/4 but is full now. The lift pump runs, I can feel and hear that the motor is spinning when I cycle the key. I removed the fuel filter and cycled the key and get no fuel into the bowl. It looks like the lines are stainless from the pump to the tank so I doubt it is sucking air. I pressurized the tank with a shop vac and I get fuel coming into the filter housing. Am I missing something obvious? I have never seen an electric pump that would run and not pump fuel. I removed the suction line at the pump and don't feel any suction there.
View 14 Replies1999 4.6L won't start after sitting a month. Ran fine before, now won't start. Cranks fine. Cannot hear fuel pump turn on when key is turned. Fuel pump fuse is good.
Fuel pump relay clicks a few times when key is turned. Is this normal? I am hoping it is the relay and not the pump. What should I check next? The wires at the pump? What should they read?
1999 f-250 super duty... okay, here is what i have going on. basically no power to the fuel pump. For the last 2 weeks the fuel pump relay and 1 of the relays behind the radio (next to the blue relay) would chatter and the truck would die. Wait about 5 minutes and turn the key on and if the chatter was gone then it would fire up and run... So NOW no chatter on either relay and not cranking up. - motor turns over just fine- just no power to fuel pump. So I changed out the relay- both behind the radio and the one under the hood. still chatters and no start. i have checked the Inertia switch and 12 volts there... Here is my question, when i turn the ignition on, i have no power to the base of the Fuel Pump Relay.... Where does the power come from to power the relay???
View 13 Replies2003 f350 5.4... Is the fuel pump relay behind the radio? Under hood? Or built in the fuse panel and unserviceable?
View 14 Replies2003 F-350 - 7.3. With the key in the on position there is zero voltage to the fuel pump. Fuel pump fuse is good. I traced the red with black tracer wire from the pump up through the firewall and to the safety inertia switch. The switch has continuity so it's OK. Then from the safety switch I traced the green with yellow tracer wire to a fuse block plug connector. Then I checked continuity from that connector out to the #40 fuel pump fuse and it's open.
So I then i checked from the fuel pump fuse to all the back connections on the back of the fuse block and there was no continuity to any of them. So I removed the back cover off the fuse block to expose any issues. I found two board mounted relays. Now, from the fuse I get continuity to one of the relay connections. So did Ford hide the fuel pump relay and make it non replaceable? Also if this is the pump relay then what circuit energizes it? I need to make sure before I replace the fuse block.
I have a 2003 F250 and dont have power at fuel pump, or fuse #30. I put power directly to fuel pump and it worked and truck fired right up.
View 13 RepliesThere was no power getting to the fuel pump on my 2002 Ford F250 73 diesel traced it back to the inertia switch no power in or out but I'm getting power at the fuel pump relay put the code scanner to the PCM and no communication....
View 9 RepliesSo the other day my 20amp maxi fuse for my fuel pump decided to blow, put a new one in & everything has been going good since. Is it just a fluke or is this an indication my pump is going out? I inspected wires off the pump & connections for corrosion & that's good, fuel filter is also new about 2 months ago & I always run #1 diesel with a little additive in the winter.
View 1 RepliesI was wondering if it is possible, due to budget, to perform the electric fuel pump conversion in steps. By that I mean could I remove the mechanical pump and install the electric pump on the frame, but retain the stock filter housing and regulator? I would use high pressure hose and run from the stock pump supply line on top of the engine to the fuel bowl inlet and then use high pressure to run to a three way fitting, and a bit more hose to join the fitting to the stock lines running to the head. later as budget allow I will replace the filter assembly and regulator and then the lines to the heads.
View 2 RepliesI was driving my truck then all sudden truck started losing power then slowly died. I restarted it, it was a lil shacky then died again. Iunscrewed the fuel filter and looked in the housing and there was lil fuel in bowl i turned the key to on position and bowl did not fill with fuel looked as if it were shooting some bubbles up(air) could it be outta of fuel???
View 10 RepliesWhere the fuel pump is located on a 2000 F-350 7.3L Diesel? Also, how complex is replacing this?
View 14 RepliesWent to start my truck (2003, 7.3 F250) one evening and I found the headlights on. No keys in the ignition and the truck hadn't been driven for 2 days. There was a strong smell of plastic and or electrical components burning in the cab. The truck started without a problem. I shut it off and the lights remained on. Cycling the MFS and light switch would not turn the lights off. I had to disconnect the batteries and leave it till time allowed for trouble shooting.
I've had it in my shop for three months now and this is what I've found so far.
-Source of the burn smell is coming from the fuse panel. More specific it's coming from a bulkhead that plugs into the panel. One pin connected to a White wire with 2 purple traces. I've traced this wire to one of 2 small relay packs in the engine compartment next to the driver side fender. I've replaced the relay this white/purple wire connects to as a precaution. This did not remedy my trouble.
-The local ford dealer told me this relay was for the A/C clutch. I located a 10amp fuse in position 10 and removed it. The headlights finally turned off.
-I started the truck and the A/C compressor clutch still engaged and ran. Smoke began to pour from the fuse panel once again. I killed the truck and head lights remained off. All done with the fuse in position 10 removed.
Here's where it gets weird!
-With the key/engine off and I turn the headlight switch on and MFS to low beam the fuel pump is running. Change the MFS to high beams and the fuel pump turns off.
I've looked over the wiring harness and there are no noticeable problems indicating multiple wires being shorted. How are all these issues related?
I just got delivered a 7.3L from down south. Batteries were dead so replaced both. Fuel was a couple notches above red line (much closer to red line than 1/4 tank) so I added about 7-8 gallons.
It will crank forever and ever...Won't start.
With starter fluid it starts but not strong enough to pump the pedal and rev it up to keep it idling.
I know s-fluid is bad but if I continuously spray with key turned forward it will run but as soon as I let go of key it shuts off.
20 degree weather and it was delivered to a parking lot so I cannot plug it in.
Was told to check filter cap, turn key, and see if it fills bowl with fuel....if not then it is fuel pump. Someone else mentioned that it could be bad crank position sensor? Does this sound like fuel pump?
I am installing a fuel pressure gauge into my 02 7.3 I went to the thread the sensor into the plug hole on the fuel filter housing and it wasn't threaded, turns out the sensor thread is slightly smaller and a different thread ... The directions say to install it into the filter housing or the lift pump ... So I'm assuming I have to go the lift pump direction of installing it but where the lift pump is or how to install the sensor into it while not throwing a code or causin problems ... A step by step and even pictures.
View 14 RepliesMy vehicle would not turn over and we could tell it was fuel related. The fiel pump relay has burnt through the motherboard of the fusebox. It is my understanding that this cannot be fixedand another fusebox must be installed. I have been to many junkyards in my are looking for it to avoid the dealer prices..all of the expeditions that we have found locally have already had the fusebox pulled. Any other vehicles that this might be interchangable with? My friend has an 01 expedition..would this work?
View 1 RepliesThis applies to a 2001 F-350 with 73,000 miles on the engine. Engine oil level is good, batteries charged, HPOP reservoir is full and passes Cody test with flying colors. Fuel pump runs for 20 seconds at key on. Start takes about 6 seconds. If I shut the key off and restart immediately it starts in under 2 seconds but if I wait about 30 seconds it's a 6 second start. Here is an AE that I ran on it, it has me stumped. FWIW it seems to start quicker when AE is hooked up. ?? An odd whir type of noise comes out from somewhere under the hood when I first turn the key on and when I clear the codes with AE.
View 14 Replies2004 super duty crew long bed 2wd, v10 auto SLT.
Manual says not in fuse block.
Looked behind radio, nothing, not even a space or the blue one there.
There are some on the firewall, driver side not marked. No pink wire.
Where else??
I am looking for the location of the fuel pump relay for my 1999 Ford F550 V10 4WD Gas truck.
I have replaced the fuel filter and fuel pump. When the key is turned the pump gets juice and 2 seconds later is not getting juice. No lines are coming into it, so it's not getting up to pressure and shutting off.
While doing a visual inspection I noticed that the AIH hot wire (captured nut wire) had broken off and was laying loose. I removed the wire from the relay and made a new 8 gauge wire, I connected it to the relay and was about to add it to the AIH when I got a healthy spark ( it touched the ground wire ) and yes the truck was not running and the key was out at the time.
This sounds to me like the relay has gone south, am I right??? I have a new OEM relay to install but I have a question. In what order are the wires and ceramic fitting go on the AIH post???
I am trying to diagnose my fuel system, but I cant seem to find the fuel pump relay. My truck is an 2004 f250 crew cab work truck with 5.4L. it seems that the relay can be mounted anywhere from behind the radio or in the engine compartment as well as built in to the fuse box under the steering wheel.
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