I run WVO (start on B100) in my PSD, when it runs... It's been down about a month, since I changed my fuel pump. It will start with starting fluid, but won't run unless I hold the RPM's over 1500. It seems like it's not getting fuel, so I checked the schrader valve and it only has 10 psi when I'm cranking. The fuel filter harness wires were bare and frayed (aftermath of a biodiesel leak), so I taped them up to keep them from touching, but the connectors on the ends of the pigtails are soaked with fuel. I'm thinking it may be the wires, connections or sensors they plug into. It was already throwing codes P0236, P0341, and P1211 when it was running (had low power & stalled also). I checked yesterday, and it threw a P0603. Do you guys think it's the PCM, or something else?

Here's what I checked/replaced:

-hpop level
-fuel hoses (air leaks)
-#22 fuse
-CPS replaced
-cleaned filter bowl (filthy!!!)
-taped wires

Your help is appreciated

 

Sounds like the waste WVO may have taken out your fuel pump or plugged up a line. Your truck has a mechanical fuel pump so the PCM won't stop you from having fuel pressure.

 

1211 is high pressure oil related but extremely low fuel pressure can also trigger it

 

You put a new FP on a month ago and it hasn't run since? What were the symptoms for the FP replacement in the 1st place, leak or low/no pressure?
Maybe your not geting fuel to the pump?? Blow air backwards through the fuel line and see if you get bubbling in the fuel tank.

 

Could the FPR screen be plugged solid?

 

Don't ever use ether on these engines. It gets you nowhere and you run the risk of blowing it up or bending something. Fix the electronics and the fluids and she will run. If not the ether gives you nothing other than the thrill of hearing it fire off. Very risky for such a short-lived payoff.

 

i would definitely replace the electronics since the wires got all freyed or put new wires in. also do as was said above and blow in the fuel line to see if you get bubbles in the tank. then we can rule that out. check/clean the fpr screen, it's in the little hole in the right side of the fuel bowl. get a q tip and break the cotton part off of it and use the stick part very gently b/c the screen is very easy to break.

 

ARE YOU GETTING SMOKE while cranking it over? lets start there.


never tested my fuel pressure while cranking. but i would think it should be the same as when running.

is your fuel bowl full of fuel? if you drain it will it fill back up?

 

thanks for the responses; i'll try to address all the issues mentioned.

-I'm pretty sure the pump is okay - i'm going to blow down the lines into the tank in just a few minutes

-as for the 1211, I had that before she died, if that means anything. i did just pull out the IPR, and I'm going to clean it out

-the reason I replaced the fuel pump is because of a leak. I had one start spewing in May, and then the new one went, too. the truck ran while it was leaking like crazy, and for just a few minutes after I changed the pump. it's been dead since.

-i've cleaned out the fpr, including the screen. replaced o-rings, put back in, still no start. it's back out now, and unfortunately, I've lost the check ball... does anyone know what size it is and where to get just the ball? by the way, what is the sensor attached to the fpr? it's pretty soggy with fuel...

-as for cranking, no smoke; tach moves

-I'm done with the ether; my mechanic friend who suggested it almost got his face blown off, and now I need a new air filter housing

I'm going to blow air into the lines, and clean out this IPR for now. Let me know what you guys think...

 

When you changed the fuel pump did you remove the fuel bowl assembly?...If so , I would be looking at the wiring in that area , mainly to the IPR....

10 LBS at the schraeder may only mean there is air in the system....Just a thought.....

 

BTW: Welcome to FTE, Forgot to mention it the first time.

It may not be getting fuel yet? and you still have air in the fuel system. Did you put more fuel into the fuel bowl? and then try starting it.

There is not a ball in the FPR normally but a 3/16 Ball wil bump the FP up a bit. Look here for more info:
https://www.ford-trucks.com/forums/5...mming-fpr.html

It ani't getting fuel, at least not yet anyway. How long have you been cranking on it to get it started? It wil take a while to get the air out of the fuel system, especailly if you didn't fill the filter after the pump change.
I hopr that didn't do any internal damage to the engine. Do not get another OEM housing. Search this forum for 6637 filter, the OEM housing hsa been know to leak dirt and destroy the turbo!

 

What should fuel pressure be at schrader valve when running normal? How do I check it?

 

Pressure should be less than 80psi but will run as low as 40-50. If it is that low you can do the fpr mod. just be sure to keep it less than 80 after mod. you can check it with a regular stick type tire gauge on the schraeder valve on the drivers side of the fuel filter housing.

 

i believe ford requires 15-20 psi cranking, i will have to go check
your 236 is a map code
341 i think is another cam sensor code
603 is kam memory

 

10 psi is enough to make it start. I just started one the outher day with the filter housing removed. I was checking to see if I had high pressure oil.

Get your hands on a guage and see what the HPOP is doing. It should be about 500 psi cranking. You can pull a plug from the head and take it to a hydraulic shop and get a guage made for about $30.