Ford - Explorer :: 2003 - Fuel Pump Pressure Drops?
Sep 21, 2013
I have an 03 Explorer that had a starting issue. Long story short, it had no fuel pressure. So after testing the relay, I switched out the pump with an Airtex unit . All seemed fine...for a while.
Became hard to start again, checked Schrader valve with the key on, and not running, no pressure. Strange though, it would run.
So got the fuel pressure gauge on it. Turn the key and pressure will go to about 5-10psi and then drop to zero. Turn key off and on again, up to 5-10psi, then drop to zero. Turn the key to start and pressure goes up to 10psi, then starts, then goes to 30 while running and you can drive it around. Shut off motor and pressure goes down to zero.how the sending unit is supposed to hold fuel pressure and not release it? Is there some kind of check valve in the sending unit assembly that can be cleaned or does it need a whole sending unit with another pump? I already spent the $100 for the pump, and it is working if you can drive it!
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I have a 03 explorer sport trac that has no fuel pressure the pump will not run. It is a bew pump just replaced it amd drove 4 miles cut it off filled up with gas now it wont run I replaced the pump again thinking I might have got a bad pump but it still wont run. I've checked the relay and inertia switch I have the 5 pin connector on the fuel pump module. 1 wire has good power to it but the pump won't run...
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1995 Ford Explorer, 4 ltr. engine, pushrod. Will not start. Replaced fuel pump, fuel filter, every relay, pressure regulator, and the crank position sensor. I realize there's a whole bunch more parts under the hood, but I am ready to give up. Before the fuel pump would not run. Reason for replacing the parts. Now it won't stop running and you can feel the fuel by-passing at the pressure regulator. When checking the pressure at the rail I get zero !! I used a tire pressure tester for this. And, like I said no pressure. This vehicle has around 170,000 miles on it.
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Just did a complete engine rebuild on 2003 Explorer. All back together....have new battery, starter working, spark at plugs lol crank but no start. Next check is fuel. Fuel pump WAS working fine when timing chain guides went about a year ago...(had to rehab 2 parents and finish bath remodel before pulling engine) So... 1 year later I can't seem to get the fuel pump to work. I checked all fuses and relay. The fuel gauge is working - full tank.
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Working on a 88 Ranger 2.9L 5-speed ext cab. The fuel pressure drops off fairly fast when turned off and I'm pretty sure that the check valve is bad. My question is, which pump has the check valve? It is a single mid tank set-up and has a pump in the tank and on the frame.
Pressure is fine while running. about 30psi @ idle and 40psi with no vacuum on the regulator. The pressure drops off within a couple of minutes which causes it to have to crank over for a bit to rebuild pressure and start.
It looks like the frame pump is readily available while the in take pump is special order. I just need to know which one has a check valve. I'm thinking the in tank pump, but I hate to waste money for the wrong pump.
Pressure drop rate
30 psi @ shut off
25 psi @ 1:05 min
20PSI @ 2:30 min
15psi @ 4:45 min
still dropping
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I have a 2004 Explorer 4.0L v6 that I recently charged the AC in. The engine was rebuilt not to long ago so the AC was completely recovered (bought it from a friend), so I know I started fresh. I am not by any means a novice mechanic but, just dabbling into the AC world and have watched a ton of how to videos, and what not.
I went out and bought a set of manifold gauges as well as a vacuum pump. I do have the rear air on this one so it takes (correct me if im wrong) 56oz of refrigerant. I pulled a vacuum of 28 (mercury?) and it held it for a good hour so, I am pretty sure no leaks. I went ahead and charged the system... Compressor kicked on like normal, air got cold, and everything seemed to be going just like it should be. I went by just a random r134a ambient pressure chart NOT from ford.
I thought great this is going to be like new! Well, now the problem i'm having is in the mornings at say 65-85 degrees it blows ice cold. Once the sun gets higher in the sky, and it gets up to 95-100, it doesn't seem to be able to keep up, even driving for miles and miles. I noticed the rear air evaporater low side, doesn't seem to feel very cold either. Does this mean I might be over charged/under charged?
I have a video of the pressures at 2000 RPM, AC set to "max", both front and rear fans set to highest setting, windows down. At 31 seconds, the pressure drop is because I let off the throttle and let it idle for a bit, so you can see those pressures.
Copy of 04 explorer ac status - YouTube....
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I need to check the fuel pressure to verify if my fuel pump is functioning. What is the procedure and PSI?
Assume that I open the valve on fuel rail with engine off, then connect pressure tester kit, put key in ignition to "on" position, then pump up to specified PSI???
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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.
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This problem just cost me a new starter and flywheel, cuz after cranking my engine so many times the starter mess up the flywheel teths, anyways, i install a fuel gauge and i find out that my pressure drops in seconds, like i turn the key on (pos ii) and but the time i get out the car to the engine bay to look at the gauge, the pressure is almost ZERO
When I open the door the fuel pump primes and built pressure, when i turn the key i heard the pump primes too, but why does the pressure drops so fast?
I have an aeromotive fpr, and a bosch in line pump, turbo set up and 550 cc injectors( brand new )...
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I just bought a 2014 Prius- Pkg. 2 car. I had an '06 & an '08 Prius and kept the tire pressure @ 44 Lb.s for maximum mileage. I always fill my tank to the top well after the pump clicks off.
1) The dlr. told me I will only get an accurate MPG by not filling the tank after the pump clicks off. He claims the computer doesn't read the extra 1-2 gallons and that is causing me to get about 35 MPG even though the trip meter says 50 MPG.
2) The dlr. told me not to run my tires @ 44 lbs. Said it is a safety issue. I've been doing 44 lbs. since 2006 with great mileage and no safety issues.
Am I wrong for filling my tank to the top? My Prius has just over 600 miles today.
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I have a 2003 4.6l f150 164000 miles. While back oil pressure dropped to 0. Then chattering. Then up then down. I changed the oil and filter, then flushed the motor, then changed the oil and filter again. 1500 miles, no problems, no chatter. Then all of a sudden it happens again. Oil level good and clean. Oil pump?Pick up tube?
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I have an 01 F150 Lariat Supercrew 4x4 with the 5.4 Triton. The truck has 222,000 miles on it. Recently, I have noticed that when I am stopped at a stop light/stop sign while in gear, the oil pressure gauge drops to zero and the light comes on. As soon as I let off the brake and give it gas, it pops back up to normal. While driving, the needle never moves and stays consistent until I stop again, and back down to zero it goes.
If I put the truck in Park, the pressure goes back to normal. Same with neutral. It seems it is hit or miss and does not do this all the time, but I just wanted to see what your thoughts are. After doing some research I am leaning towards an oil pressure sensor/sending unit.... The truck runs perfectly fine, I just want to make sure it is not something more serious.
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I've got a '98 F150.throwing codd 402, excessive flow EGR, also the oil pressure drops to absolute zero only when gear shifts but comes right back up. No knocking or other distress sounds in engine. I know I'm in need of an oil change. I already searched a bit and decided to swap out the DPFE sensor which I did purchase from the dealership. No code as of yet but what could that pressure drop be? Could a simple il change and filter fix that?
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So, I just had the fuel pump replaced on my '15 6.7 a month ago and it just died again. (next day edit: it didn't actually die, it showed all the same symptoms)
Same symptoms: whining sound, low fuel pressure warning, reduced power warning.
This time I'm 50 miles from home so I pulled off the road before it shut off. Interesting, I was in a hilly area and my low fuel warning came on too. We are waiting for a tow. I was considering trying to push on but don't want to get stuck in a dangerous spot on the highway. We're in a church parking lot.
So, last time this happened I was on flat road with about a half tank of fuel on a lunch break. I ran a mile after the warnings came on to feel out the issue and to see what would happen. I happened to be only about a mile away from my dealer so I drove that way. I got reduced power warning and then it cut power on me (limp mode). I made it to about 100 yards away before it cut off.
This time, I was in a hilly area at night on a windy two lane road with no shoulders in the woods. I was miles from civilization and was showing below a quarter tank of fuel. ~100 miles to EMPTY. I got the low fuel pressure warning first and then the reduced power mode before the whining noise started. I was climbing a hill on a curve at the time. I drove a quarter mile and then pulled off the road into a parking lot so I wouldn't be stuck on the shoulder. It didn't actually go into limp mode.
I let it sit a few minutes, talked it over with the wife and decided to call for a tow. After talking to the tow truck driver who said he would be an hour because he had to go find a bigger truck, I decided to see what I could do while I wait. I fired it back up and the fuel level dropped to below 1/8 and I was now showing 33 miles to EMPTY. I was parked on a hill with the back end up. I had backed the truck into a space to make it easier for the tow truck driver. I let it run a minute, checked for leaks and it seemed to run fine with no studdering or additional warning lights.
CEL was on but no new warnings. I put in my code reader and pulled the P0087. Just one code. I revved it a bit to see if there were any issues. It seemed fine so I decided to try my luck. I started driving towards home with the intention to stop at the first diesel station to fill up. Truck ran fine. After two minutes of driving gently, heart racing, my fuel level came back up and it now read 88 miles to EMPTY. I drove 11 miles to the nearest station and filled up. No issues. I shut it down. I fired it back up. Still no issues so with a full tank, I drove home the remaining 30 miles without issue.
Planning to take it in to the dealer Monday to get it checked. Could this be from an air pocked due to low fuel level and hilly terrain? Is my new pump dying already? Is there something else going on inside the tank or elsewhere?
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My friends 2000(I think) explorer With the 4.0 86k has burnt up two pumps in two weeks. This last one only lasted a day. There was over half a tank of fuel in it when installed and only drove it to work and back, about 50 miles. Next morning he went to leave, nothing. Pump won't run. Checked fuses and relays they were okay. Why would this be happening?
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I have a 2002 ford explore 4.0 sport 4wd. I have a problem with my car, one day I tried starting the car and it didn't want to start. So i replaced the fuel filter and the car started. then after starting it a few times it didn't want to start anymore, so i took of the fuel tank (thinking bad gas, and there was stuff in the gas) so i take out the old gas out and put new gas, and bought a new fuel pump and filter, and when i put the gas tank back on the car, it still didnt want to start, so i take the fuel pump and find a random battery and connected it to the fuel pump and the pump spins so it works. I connected the pump to the car by itself not it the fuel tank (from underneath the car) and i was under the car to see if the pump turns on and someone tuned the car on, and the pump doesn't turn on (doesn't spin or anything). Long Story short, what i should do? Also I was looking for the fuel pump fuse and couldn't find it (thinking it might be the fuse) what is the fuse number or where its located.. i know where the fuel pump relay is, but just not the fuse. Why the pump wouldn't turned on??? The pic is how my fuse box looks like(there are many different version of the fuse box just wanted to show you how mine looks)...
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I have a 2000 4.0 Explorer that sometimes will not start. It has happened on cool mornings as well as hot days after I shut it off, for example, shutting it off to fuel up. I always turn the key to the on position and wait a second or two before cranking, and when I do that, I can usually hear the fuel pump. It's when I don't hear the fuel pump that I know it won't start, and sure enough, crank and no start. My question is, is the fuel pump going out? Or another thought I had was maybe the inertia switch starting to fail? It runs great when it starts, just has a problem starting sometimes.
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I'm working on one of our fleet vehicles here, a 1995 Explorer. about 2 months back, it stalled out. Got it back to the shop and turned the key on .... I couldn't hear the fuel pump. I replaced the fuel pump and the fuel pump relay. Vehicle started right up and seemed to run O.K. About 2 weeks ago, it stalled out again, same symptoms, acts like it runs out of gas and can't hear fuel pump.So, I have been playing with it and find that it starts up great in the cool mornings. In the afternoon when the temps are hotter, it won't start (can't hear fuel pump). The following morning when temps are cool, it will start right up and can hear the fuel pump. I almost wrote this one off as a defective fuel pump, but I'm not sure on this one.
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So I just replaced the low pressure fuel pump on my 14 6.7 and it seems to be running as good as it was before. I need to get an aftermarket fuel filter setup for my truck. So what are you using, why did you pick that particular system and is it working, does it really work for taking out water and other contaminates? These fuel systems don't seem to be up to par in filtering modern day fuel, I need peace of mind.
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My parent's bought a 2002 Explorer 4.0 V6 very early, either late '01 or early '02 when it first came out. Besides the dash blackout (which I found a fix for, need to do) it's been plauged latley (since Nov/Dec 2010) with the intermittent issue of when... You turn the key on to start, you dont hear the fuel pump enguage, thus no start. Get towed, it works like a champ.
It's blown a fuse 1 or 2 times cause of this, had the fuel pump recently replaced (dec/jan this year) and just did it again. Our local Ford dealership figured the fuel pump went bad from sitting, the vehicle only has about 33k miles on it (dad dont drive much). What appears to be a bad fuel pump, only to have it get towed, or sit overnight and start like nothing ever happened?
Dad's ranting about not trusting the vehicle anymore, he's 80yrs old so I can't blame him for wanting to feel comfortable with knowing his vehicle should start, but it is a machine, they do break but we cant seem to get this fixed.
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I am a new diesel owner. I bought a 2014 F250 about 9 months ago. Three times in the last 50k miles I have heard the fuel pump near the tank making noise. Twice, while making the high pitched noise I have gotten a low fuel pressure warning and reduced engine power.
The first time, I left the truck with the dealer for two days while a tech drove it around. everything checked out fine. (30k miles)
The second time I heard the noise i did not get the low fuel pressure warning. (40k miles)
Today, I heard the noise and got the lower fuel pressure warning just before the truck stalled out. Lucky for me, I was near home. After a minute the truck start and I nursed it the last mile or two. (56k miles)
The tow truck just picked it up and is off to the dealer. It sound to me like the low pressure transfer pump is bad or going bad.
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