When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I recently purchased a 2005 F-250. Ran like a champ, until it didn't. I literally, filled up the tank with fuel, drove home, parked in my parking space and shut off the truck. Forgot I needed to jump my tractor so I restarted the truck and lo-and-behold it was missing with white smoke. Hooked up my OBDII tester and am getting:
P0113 P0231 P0263 P0266 P0336 P0674 P0676
Next morning, No start. My diagnoses is 2 bad injectors and 2 bad glow plugs, along with the IAT sensor. P0231 has me worried about the fuel pump... The relay and fuse are fine.What do you all think?
P0231 can easily = two bad injectors. Everyone needs a fuel pressure gauge.
The fuel pump relay is embedded into the fuse panel, there is only one way to check. To confirm, with everything still connected, a voltmeter check at either the inertia switch or, better yet, at the positive by the connector at the HFCM. If those equal the battery voltage, whatever voltage drop you have during Key-On, then check the ground for the fuel pump at the firewall.
A failed fuel pump relay is best repaired at Circuit Board Medics, as they are expensive at the dealer.
P0231 can easily = two bad injectors. Everyone needs a fuel pressure gauge.
The fuel pump relay is embedded into the fuse panel, there is only one way to check. To confirm, with everything still connected, a voltmeter check at either the inertia switch or, better yet, at the positive by the connector at the HFCM. If those equal the battery voltage, whatever voltage drop you have during Key-On, then check the ground for the fuel pump at the firewall.
A failed fuel pump relay is best repaired at Circuit Board Medics, as they are expensive at the dealer.
Thank you for the information. I did the check at the inertia switch and it seems fine, I also made sure the inertia switch wasn't tripped while I was there. I checked the battery voltage as well, it was low so I did charge this morning, this was probably from me cranking on it for a bit the day before. Once I had the batteries charged they were holding. I cranked the truck for a few seconds, probably 15-20 seconds both times, and getting white smoke out of the tail pipe. The RPMS are sitting at around 150 when cranking, I just replaced the starter about 2,000 miles ago. The oil pressure shoots up with no issues.
I replaced both fuel filters, just in case, they weren't horribly dirty as I just replaced them 5,000 miles ago. I did cycle the key a few times after this to re-prime, I can hear the fuel pump working.
I checked the oil also to make sure it was full, it was, and still golden.
The truck almost wants to turn over, but doesn't. I checked the codes again and there are no new ones, just the ones I specified earlier. Is it normal for injectors to just fault suddenly, after running perfectly fine all day?
Thank you for the information. I did the check at the inertia switch and it seems fine, I also made sure the inertia switch wasn't tripped while I was there. I checked the battery voltage as well, it was low so I did charge this morning, this was probably from me cranking on it for a bit the day before. Once I had the batteries charged they were holding. I cranked the truck for a few seconds, probably 15-20 seconds both times, and getting white smoke out of the tail pipe. The RPMS are sitting at around 150 when cranking, I just replaced the starter about 2,000 miles ago. The oil pressure shoots up with no issues.
I replaced both fuel filters, just in case, they weren't horribly dirty as I just replaced them 5,000 miles ago. I did cycle the key a few times after this to re-prime, I can hear the fuel pump working.
I checked the oil also to make sure it was full, it was, and still golden.
The truck almost wants to turn over, but doesn't. I checked the codes again and there are no new ones, just the ones I specified earlier. Is it normal for injectors to just fault suddenly, after running perfectly fine all day?
Nothing you posted provides any assurance that you verified the fuel relay operation. Maybe you did, but you don't specifically describe that you VERIFIED that the fuel pump is receiving power when the key is turned to the ON position (except "hearing" the fuel pump work ..... and MANY people say that when it is really the vacuum pump). You did say you checked the inertia switch, but did you with a multimeter to see if it was getting power, or did you just check the reset switch?
My point is that the P0231 code is commonly power to the pump (ie commonly the integrated relay failed), but no doubt it MIGHT be the sensing wire to the PCM.
Maybe the best test for you would be to remove the secondary fuel filter, remove any standing fuel, and then time (in seconds) how long it takes to fill the secondary fuel filter bowl when you turn the key on. It should fill fast (ie 3-5 seconds).
When I get so many codes at once, I always want to check my Vref = 5v to make sure the network or one sensor isn't grounding out and causing false positives in others.
Nothing you posted provides any assurance that you verified the fuel relay operation. Maybe you did, but you don't specifically describe that you VERIFIED that the fuel pump is receiving power when the key is turned to the ON position (except "hearing" the fuel pump work ..... and MANY people say that when it is really the vacuum pump). You did say upu checked the inertiaswotch, but did you with a multimeter to see if it was getting power, or did you just check the reset switch?
My point is that the P0231 code is commonly power to the pump (ie commonly the integrated relay failed), but no doubt it MIGHT be the sensing wire to the PCM.
Maybe the best test for you would be to remove the secondary fuel filter, remove any standing fuel, and then time (in seconds) how long it takes to fill the secondary fuel filter bowl when you turn the key on. It should fill fast (ie 3-5 seconds).
Hello,
Yes I checked the inertia switch, with the instructions you provided using the multimeter. I have since solved the p0231 code so no worries there.
Since my last post I have replaced fuel injector 1 and 2, and I have also replaced glow plug 2,4,6,8 - since I had codes for 2 and 4 - I decided to replace all of them. This resolved the codes for the glow plugs and the fuel injectors.
The code for the IAT sensor wasn't the sensor on the valve cover, but was my MAF, the wires were ripped out of it. *Eye Roll*. I just bought the truck 4 weeks ago so no judging please. I am really cleaning up someone else mistakes -or carelessness perhaps? Fixing the wiring fixed the code for the MAF sensor.
The fan clutch has yet to be replaced but I am working on it. Waiting for the part presently.
So, today, after fixing the MAF sensor the truck ran B-E-A-UTIFUL... for about 30 minutes. No missing, no codes except for the fan clutch. Then, suddenly, the truck started running rough again and threw a p0266 code for cylinder 2. I drove it home running like barf, scanned the codes again, and now I am getting the p0266 code and code p0672... I JUST REPLACED THESE. My FICM is running beautiful at 49v, so I don't think it has anything to do with it.
I did some reading and saw that the PCM or faulty wiring could be the issue but I don't believe the wiring would do it considering the truck ran fine for a short period. Thoughts?
Crank, No Start
