I've got a 1997 4x4 xlt with a recently rebuilt engine less than 2000 miles on it I just replaced the fuel filter fuel pump and the relay and what's wrong some times the fuel pump will turn on sometimes it won't don't know what to do now. It turns over just not getting fuel I'm know the pump isn't getting power since I can't hear it kick on...
View 2 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 RepliesI have a 2000 F150 with @175K miles. Replaced the clutch about a year ago, replaced the front calipers a few weeks ago, due to the right front locking up on my way home from work. Since then, when I try to start, it blows the fuel pump fuse. (#10)...
View 2 RepliesI've got a strange problem on my '01 F-150 4.6L 4X4. When the outside temperature gets below 40-45 degrees the fuel pump won't always run when trying to start the truck. You can cycle the key switch on/off 8-10 times and the fuel pump will run. The engine will then start and run fine. You probably have to use this procedure 80% of the time. It started this last winter. I replaced the fuel pump relay in the power distribution box under the hood but that did not work. When the outside temp warms up the problem goes away.
View 10 RepliesHow do you test the fuel pump regulator, the truck wont start. I tested the schrader valve and it does have pressure but didn't seem like much. (need a gauge) I replaced fuel pump a few years ago so was wondering about the regulator. Is there a test procedure?
View 7 RepliesDrove for 25 miles. Park, try to restart to park truck at other place. Truck start but very rough. Did drive for 20 yards and truck stop. Try to restart no way. I think I do not hear fuel pump when I turn key and gas pedal fill completely empty, no any force to move it. Should I assume fuel pump or should check some sensors first? I have P0420 for a few weeks, not source of this problem. Drove truck before with P0420 for years. No other code. Do we have PATS in keys? My truck is f250 99 LD. My pickup have PATS. How to check it?
View 5 RepliesMy brothers 2001 is having an issue with the fuel pump. It has a random no fuel pump basically the fuel pump does not come in, he turns the ignition off then back on and you can then hear the fuel pump turn on and the truck starts and runs normally. I'm not looking forward to dropping the tank to replace the sending unit so I was thinking maybe the relay is the issue? I'd eater do that than a sending unit job...
View 8 RepliesNew to this site, my problem is on my 2003 4.6L fuel pump not working.My problem is that I am not getting voltage to contacts on pcm and fuel pump relays.
Getting volts to #30 fuse 30amps ok, voltage to pcm diode ok. Voltage on #30 on both relays(pcm & fuel) but I am loosing voltage across coils contacts #85 & #86, these makes hot #30 & #87 to make pump work. Inertia sw ok, Don't know if PCM is bad, ck fuse #2 ok 5 amps.
My 02 F150 4.6 has 84K miles on it, and started stumbling/hesitating during accellartion about three weeks ago. Before this problem started (about 2,000 miles ago), I installed a new fuel filter and air filter. Since I noticed the problem, I installed new plugs. The problem didn't go away, so today I checked the fuel pressure. At idle the pressure is 32psi with the vacuum line left on the fuel pressure regulator (30-45 is normal as per Chilton's), and 42 with the vacuum line off (40-50 is normal as per Chilton's). I also had someone else rev the engine so I could observe, and found that the fuel pressure went as low as 28 when the engine speed was quickly increased. The standing fuel line pressure is 30 (30 is normal as per Chilton's) Does this sound like a fuel pump problem, or is there something else that I'm missing.
View 10 RepliesI have a 1998 Ford F150 with 4.2.. Started off a intermittent problem of not starting acct no fuel. Now will not start at all. Checked all fuses and relays.. Am not getting voltage at fuel pump. Changed ECM thinking that was the problem.. Have checked all multi wire connectors for corrosion and tightness. Am at a lost what to try next.
Also, not sure if its related or not. The turn signals and hazard flashers do not work. When I turn on the hazard flashers, nothing happens. If I leave the flashers switch on, the turn signal work. Checked all fuses and relays and they appear good.
Ok I have recently bought a 1998 Ford F-150 V6 4.2L 2WD and when the guy sold it to me the check engine light was on and he told me that randomly when you turn the key to the on position you will not hear the fuel pump buzzing sound and he knew it wouldn't start, he said you would have to turn the key from the on and off position many times until you hear this sound and then the truck will start and run fine.
First off I got the codes read and there were three of them P0171, P0174, and P1537 some things to note are that the drivers air bag looks like it had deployed, the cover is loose and when I pulled it back the air bag looks duct taped up inside there that would cause the air bag light to continuously flash while driving. I noticed the battery leads were corroded so I replaced the battery and put new battery clamps on both wires, after that the problem did not happen for a week and I though it was over but it happened again.
Next is that the truck has the PATS system and it did not come with a remote which I have also read that the PATS system can cause the fuel pump not to turn on but not sure if this would cause it to not start randomly because sometimes it starts right up. When I started to look at the simple things to fix I noticed it did not have an air filter in the housing. so I thought the MAF sensor could be dirty so I cleaned it with the special cleaner, I put sea foam into the intake via a vacuum hose and also have put a fuel system cleaner in a full tank and have driven most of the gas out. After putting in an air filter, cleaning the MAF sensor, and sea foaming the intake, it seems to run a bit better but I am still having the random fuel pump issue.
I have checked the fuses and the and the fuel pump and ECM relays both are fine. Today I put new exhaust on it because it had some bad exhaust leaks and the truck did not start again, so the guy trying to put my exhaust on, hit the fuel tank with a hammer and it didn't work then hit it again and it finally worked. Im not sure if the hitting it did it or if it just randomly turned on like always from turning the key on and off. The new exhaust has made a huge difference in driving it feels and sounds much better.
Also to note is that when I am stopped at stop lights it will idle at about 1500 and then it drops down to 500 and back up and back down again and it does this at most stop lights, and it is not an abrupt drop it just slowly idles down and back up again. Again once the truck is started it runs perfectly fine with no issues, and there are no specific times when it has the problem it seems to be randomly. I know that many people will tell me to change the fuel pump out and I am already prepared for this but if there is any easy things I haven't thought of yet...
1999 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?
I just checked my computer I have a couple codes
P0453 evap emission system pressure sensor/ switch high
P0232 fuel pump secondary circuit high
C1303 right front isolation clamping circuit..
P0305 cylinder 5 misfire.
I changed the fuel pump 2 days ago and the coil on cyl 5.
My 2001 4.6L F-150 has been sitting on the driveway, used once every 2 weeks or so for the last 3 yrs. I came to start it a few days ago and it kept turning over but not starting. The key security chip is working, battery is charged, all plugs are firing, fuel pump fuse and relay check good. When I turn the key to ON, sometimes I hear the fuel pump priming, other times it doesn't. The times it does prime, the truck fires right up.
The times it doesn't prime, engine won't start. When the pump does prime, and while the engine is running, the pump makes a noticeable buzzing sound, much louder than normal. When the pump primes. fuel pressure measures at 42psi in the ON position, 36psi with engine running, and 46psi with engine running and vacuum hose removed. I believe all these are within specs.
My question is this: Is it safe to assume that the pump is going bad and will eventually fail completely? My second question is (and I know this can be debated til the end of time) should I get the Motorcraft or aftermarket? I have Airtex, Spectra, Carter, and Delphi available locally.
2003 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 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 RepliesThe 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 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.
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