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Old 05-29-2019, 09:52 PM   #1
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T444E Slowly Lost Power, Now No Start. HELP!

I've got a 2001 International 3000 with 7.3l t444e engine. I recently took it for a spin around the block and as I was leaving the house and climbing a hill, the bus starting losing power. Got up to 25mph then very slowly started falling. Pulled off, turned around and limped home. And when I say limped, I pulled into the driveway idling. Warn Engine light came on then engine shut off. Started it back up a few times, it seemed to idle fine but as soon as I put it in gear same thing, warn engine light and shut off. Then starting idling rough and now nothing. Engine turns over fine but won't run.

I replaced the fuel filter and removed and cleaned the strainer. Changed the oil and filter, figured why not while I'm getting dirty. Coolant level is good. From what was in the fuel strainer (maybe 1.5 oz) there were a few drops of water but i never got the "Water in fuel" light. There were also quite a few chunks of debris in the strainer but didn't seem significant given that it probably hasn't been cleaned in a long while. We did a 5k mile trip last summer and she gets regular trips every few weeks. Haven't had any issues until this!

I've got another big trip planned in a few weeks and need help! Here's what i'm thinking of troubleshooting:

1) Water in fuel (about 1/3 tank in there now, filled about 6 months ago). This bus doesn't have a fuel/water separator, seems to all be handled at the main fuel filter above the engine
2) Bad fuel transfer pump
3) Fuel line blockage. Fuel gets to the filter OK, maybe after the filter?

I'm trying to get a mechanic out to look at it, I really don't want to cough up the $$ for a tow if i don't have to! I've looked through the threads and worked on as much as I could from what's already here, hoping someone has dealt with the same issue.
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Old 05-30-2019, 02:12 AM   #2
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not familiar with engine management

If you are going to own this kind of rig, can you purchase the needed computer software that would enable you to check stored fault codes in the ECM and or TCM ? Is there a way to be able to watch injector on/off time for each injector and or other engine parameters that you could access? If you had this ability, would you know what you were looking for? Long run will a tow be cheaper/faster?


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Old 05-30-2019, 06:10 AM   #3
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Engine: T444E 7.3L
Does the bus have a Diagnostic button on the dash? Only way to find want went wrong is to get the trouble codes set when it died.
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Old 05-30-2019, 06:19 AM   #4
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How many miles are on the engine? That, to me, sounds the same as my t444e which had failed injectors. Mine had 160,000 miles.
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Old 05-30-2019, 06:31 AM   #5
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Yes. On a power stroke..lift pump... Schrader valve on fuel bowl filter. Connect a 100 psi gauge that you can monitor while driving.
The check engine light is triggered by negative pressure caused by fuel filter restriction. The lift pump pushes thru the filter and the second piston pump puts at 70 psi to the fuel rails.

Good luck
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Old 05-30-2019, 07:16 AM   #6
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Quote:
Originally Posted by joeblack5 View Post
Yes. On a power stroke..lift pump... Schrader valve on fuel bowl filter. Connect a 100 psi gauge that you can monitor while driving.
The check engine light is triggered by negative pressure caused by fuel filter restriction. The lift pump pushes thru the filter and the second piston pump puts at 70 psi to the fuel rails.

Good luck

the 444E varies a bit from the ford 7.3, they kept the old CAM-based mechanical fuel pump as the only means of lift from the tank to the rail.. I dont remember seeing any sensors for fuel pressure and there are no PID;s in the computer for it.. it does pressurize the rail to a pulsating 65-70 PSI as joe mentioned at the test schraeder under the hood.. I think it needs a minimum of 30-35 for the engine to idle.. since its a mechanical pump you'll notice your test gauge pulsate up and down as you crank..





But first follow Johnny Mullet advice, press the diagnostic button and get the codes out of the ECM and see what it thinks the trouble is..

-Christopher
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Old 05-30-2019, 08:16 AM   #7
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Quote:
Originally Posted by cadillackid View Post
the 444E varies a bit from the ford 7.3, they kept the old CAM-based mechanical fuel pump as the only means of lift from the tank to the rail.. I dont remember seeing any sensors for fuel pressure and there are no PID;s in the computer for it.. it does pressurize the rail to a pulsating 65-70 PSI as joe mentioned at the test schraeder under the hood.. I think it needs a minimum of 30-35 for the engine to idle.. since its a mechanical pump you'll notice your test gauge pulsate up and down as you crank..





But first follow Johnny Mullet advice, press the diagnostic button and get the codes out of the ECM and see what it thinks the trouble is..

-Christopher
Thanks, will do. I ordered the code reader as soon as it happened. Should have it here today to see what codes i'm getting. No diagnostic button on the dash, have to plug in at the engine. It's a pusher with 190k miles. Also grabbing a pressure tester today to see what we've got there.
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Old 05-30-2019, 08:16 AM   #8
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Did just that, will post what i get when it comes in (hopefully today)
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Old 05-30-2019, 08:17 AM   #9
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No button on the dash but will get them read today at the engine in the back.
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Old 05-30-2019, 08:20 AM   #10
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Quote:
Originally Posted by joeblack5 View Post
Yes. On a power stroke..lift pump... Schrader valve on fuel bowl filter. Connect a 100 psi gauge that you can monitor while driving.
The check engine light is triggered by negative pressure caused by fuel filter restriction. The lift pump pushes thru the filter and the second piston pump puts at 70 psi to the fuel rails.

Good luck
Is it possible that the pressure could read OK but there's a restriction past the pump? Or am i thinking about this wrong and the system is in a loop so entire system pressure will be low regardless of where the restriction is?
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