Ford F-150 - 1997-2003 :: 1998 Truck Not Starting / Not Getting Voltage At Fuel Pump
Mar 21, 2013
I 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.
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New 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.
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I have a 98 F150. The motor was replaced three months ago and have had no problems until now. The truck had trouble starting so i put an alternator on it. Fixed for a while and then it started blowing fuel relay fuses. I replaced fuel pump and filter. Truck has trouble starting after sitting overnight. When I am driving and floor it, once it hits about 4,000 rpms, the truck bucks like its the transmission but the rpms drop and then pick back up. Fuel pressure is right where its supposed to be.
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How 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?
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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...
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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.
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My F250 heavy duty isnt getting voltage to the fuel pump relay.....
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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.
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Suspect I have a bad fuel pump. I checked for power thru the Inertia Switch. When I first energize the ignition I receive 12v after a couple seconds it drops to 7v. Is this normal? I checked at the connector to pump module and see the same reading. I swapped fuel pump relay and same readings. Just want to makew sure I dont have some other issue before doing pump.
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1996 f150 sometimes it starts sometimes it don't. It is cranking over the starter is in gauging as well as the fuel pump I can hear it.... It's getting spark and I replaced the starter solenoid.
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Several years ago I had to replace the fuel pump - truck had about 100,000 miles. Within the last 4 - 5 months I have replaced the fuel pump twice and just today (about two months since the last replacement), the fuel pump has failed again. That has been the pattern now for the last several months. I have had the work done by one of the reputable car repair shops in town - they have also done work on my 2004 Impala with no issues with the repair. There must be something else going on besides just the fuel pump going bad. What would cause so many fuel pump failures.
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I drive a 2001 ford f150 lariat 5.4L. My truck will crank but not start, i am getting complete spark, and have ran a full fuel pressure procedure, and am getting complete fuel pressure, there is no water in my gas, everything checks out how it should. I ran a test on my cluster and it showed a code that said i am not getting connection to computer to start. I removed the cluster and repaired all loose wires properly, and it still wont start! I have had many people look at it and they said it could still be a bad cluster.
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Okay a little update on my truck not starting, and for those who have not read my earlier post. My water in fuel light has been on in my truck for probably a month of use. I drained the water sep under the truck nonstop and added several bottles of water remover and the light would not go out so I assumed the sensor was just bad. (im new to owning a powerstroke btw) I broke down coming home from work, got it towed home, and still cant get it started. It will crank fine just wont fire up. I tried unplugging the ICP, i replaced the CPS, and ordered a new water sep/ fuel filter for under the truck. And the fuel filter on top was just replaced a month before breaking down. Every single time i drain the separator tons of clear water diluted fuel comes out before it turns greenish.
Not sure if this could be a cause of getting water in my fuel but one time i filled the truck up completely and it was like the water overfilled and probably a quart or two of fuel spewed out onto the ground. Not sure where it came from. Also I have just over a quarter tank so i was thinking maybe the float broke and I just needed to add fuel but today before i went to add fuel i drained the sep and tons of water came out... Im so worried about hydrolocking my engine or ruining my injectors. But I dont know if my issue even is water related if the sensor just went bad...
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I Have a 1998 f150 4.6 XLT and recently it has been starting on and off. sometimes i will try and start it and wham! it starts right off. then other times I just here the starter hitting and engaging but nothing. Replaced the starter, solenoid and still nothing. It does have an alarm system but the alarm light doesn't come on, also had battery charged and its working fine. I am really fed up with this beautiful looking POS. Oh and the wiper motor needs replace.
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I have a 2002 F150. I have an intermittent issue with truck not starting. It turns over fine but will not start. Also, when having this issue, there is also no activity with the cluster when turning the key on (other than lights lighting up); the gauges will not move as they would normally when turning key on. I have checked every fuse inside / out. I have checked the fusible link at the battery as well as any other connections I could locate around the solenoid as well as disconnecting the ECM / computer and re-plugging it back up. Typically, after letting the truck sit for a day or so, it will start back up until next time.
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If I even fart in my truck, there is a jingling underneath. I know my ball bearings need to be replaced. But, what the noise is. It sound like loose change in my pocket. I can't describe it any better.
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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...
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I have a 1999 f150. Its having a fuel problem i was driving and my truck just cut out on me. I have diag it as the fuel pump cause when I turn the key, I have no response from my pump.
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I have a 1998 F150 4.6 2wd regular cab with 255,000 miles on it. Lately it has had some problems. The first is that it will run really rough when under a load, meaning when I step on the gas. It runs smooth at idle and at cruise but when I step on the accelerator it bogs way down and almost shuts off. I have changed the spark plugs, spark plug wires, coil packs and fuel filter. Now I'm thinking maybe fuel pump?
The other issue is that when the truck is having to work a little harder (i.e. pulling a trailer or running in the summer with the AC on) it will start to run hot. I have changed the thermostat, flushed the coolant, cleaned out the radiator, etc. and it still does it. Could both of my issues be related to a fuel problem??
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I noticed a vacuum line hanging under my 98 F 150 4x4 I traced it out to my front axle question is where does the other end go I have looked but no luck to where it goes.
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So I moved my Walbro to the engine bay and reran my wires. Now I couldn't find the most detailed DIY to use for reference but I ran a 20A circuit breaker from terminal 75x under the dash. From there an inline relay that I believe is hooked up correctly.
So I noticed my fuel pump wasn't running while the car is running. It wasn't even priming so I started checking connections and what not. I then noticed that when my power wire is connected to the pump I only read about 4V on the pump. If I disconnect the line and test it with no load applied I get 12-13V steady.
I thought maybe my pump had gone bad but if I apply 12v straight to it it runs just fine.
So my question is WTF!? Electronically this doesn't make sense. Physically it makes no sense. I moved the wires from one side of the car to the other. Nothing changed. Why would I be losing so much voltage with the load applied?
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