Need Help with fuel problem
December 1, 2009 - 12:13pm
I have a 00 f350, I put on a GC kit about 2 yrs ago. Recently it would appear that it seems that I have a serious fuel delivery problem(collapsing fuel lines) I'm pulling abut 15 in's of vacuum. Stock it should pull about 4-6 and GC told me that with the kit it should pull about 8-10 inches. The ENTIRE fuel system has been pulled apart and cleaned on the diesel side and the WVO side. About a month ago I thought it was sucking air into the system, I found a dried out and cracked o ring. I replaced them and it worked fine for a month or less and the same problem re occurred. (loss of power, injector knock) Thats when everything was taken apart and cleaned. So far its been working fine. With luck the problem is cured, but I wanted to know if anyone has had any similar type of problem.
December 1, 2009 - 3:49pm
#2
No I did its making vacume not pressure so I didn't think to try that and I don't know if I said this before, it mostly happens on the diesel side of the system
December 1, 2009 - 3:52pm
#3
Have you posted on the Ford Trucks Enthusiast forum? Someone there will be able to help.
www.ford-trucks.com
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2002 Ford F-250 225,000 miles; the last 25,000 on grease, 30 plate heat exchanger, CAT ELC w/external coolant filter, 6637 air filter w/ Pete's cover, 80W low beams/100W high beams, 3 ISSPro gauges, 2 Cyberdyne gauges. No grease related problems.
December 1, 2009 - 3:53pm
#4
Top of my head, I would offer that perhaps the screen on the fuel pump in the tank is clogged. Read thru this:
http://www.guzzle7pt3.com/hutch.php
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2002 Ford F-250 225,000 miles; the last 25,000 on grease, 30 plate heat exchanger, CAT ELC w/external coolant filter, 6637 air filter w/ Pete's cover, 80W low beams/100W high beams, 3 ISSPro gauges, 2 Cyberdyne gauges. No grease related problems.
December 1, 2009 - 3:55pm
#5
At this point I hope that its cleared up and I won't have a problem any longer but I'll try anything or look anywhere for help
The other I was given and only a "best guess" is my IDM (injector distribution module I think that what it stands for) may going bad. with electronics they're either bad or their not thats how I feel.
Thanks for the help if ya think of anything get back to me, I need to solve this problem once and for all
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00 F350 118,000 miles last 30,000 on grease
December 1, 2009 - 4:00pm
#6
The entire fuel system from sending unit in the tank to the fuel rail has been cleaned, blown out. That I do know
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00 F350 118,000 miles last 30,000 on grease
December 17, 2009 - 7:57pm
#7
was it blown out from the supply line back into the diesel tank? or was the tank dropped and were the pickup screens physically cleaned?
if you've got plugged screens and you push the crap back into the diesel tank, you're going to have problems again once the junk builds back up. that would create a low power/knocking and if your pump is pretty powerful (which it sounds like) you will collapse the fuel lines.
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2000 F350 7.3L
December 18, 2009 - 9:32am
#8
I've actually drought the truck to a garage in my area who has a ford factory trained mechanic he did everything I've did, dropped the tank (which was clean from debris) blew out lines. He told me I was pulling 15" of vacuum. He said he cleaned out everything including all the grease car manifold blocks and he said he found a little sticky stuff on the diesel side but couldn't be for sure that was the problem. So in short all the lines were checked by putting pressure on them which they held. fuel lines were changed again. So far it been running Ok. So for 100's of dollars I was told " At a guess and only a best guess, have my computer scanned and maybe it's the IDM computer(which incase you wanted to know is $1800)". Then I talked to another mechanic who is also ford factory trained that if it was a computer problem it would be happing all the time not just once in a while. "it's a computer it either works or it doesn't".
I also have another friend of mine who has the same set up on an 03 7.3 he is having a similar problem on his truck but mostly on the WVO side . So some where there is a defect.
I also contacted grease car and was told "you've checked everything I would of checked here, I have no good idea what it could be, but by moving the fuel pump the fuel system should pull 10- 12" of vac.".
Please keep the suggestions coming. Somewhere someone will come up with the answer.
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00 F350 118,000 miles last 30,000 on grease
December 18, 2009 - 10:38am
#9
Gotta be a physical problem. If it were me, I would want to check the pump screens on the in tank pump and the fuel pump myself. Ford trained mechanics don't impress me.
Exactly which lines are collapsing? The rubber lines connecting the GC valve and fuel manifold? You could replace all the rubber lines to see if there is a poly clog somewhere.
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2002 Ford F-250 225,000 miles; the last 25,000 on grease, 30 plate heat exchanger, CAT ELC w/external coolant filter, 6637 air filter w/ Pete's cover, 80W low beams/100W high beams, 3 ISSPro gauges, 2 Cyberdyne gauges. No grease related problems.
December 18, 2009 - 11:46am
#10
I cleaned the factory fuel pick up twice there was nothing there what so ever. The large screen and the 2 hundred micron filters.
the lines that were collapsing were the ones connecting the grease car manifolds. I actually put in a copper line I bent up on the fuel pump (vac side ) and out of the manifold to the fuel bowl.
everything points to some sort of restriction where I can fine where.
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00 F350 118,000 miles last 30,000 on grease
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Have you cleaned your grease tank cap?
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2002 Ford F-250 225,000 miles; the last 25,000 on grease, 30 plate heat exchanger, CAT ELC w/external coolant filter, 6637 air filter w/ Pete's cover, 80W low beams/100W high beams, 3 ISSPro gauges, 2 Cyberdyne gauges. No grease related problems.
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2002 Powerstroke Greasecar kit, 20 plate heat exchanger, water injection, Aeroforce Scan Gauge II, ISSPro fuel pressure, trans temp, boost and EGT gauges, Cyberdyne grease and coolant temperature gauges, auxilliary coolant pump, 282,000 miles, 82,000 on grease.