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Old 02-15-2019, 04:18 AM   #1
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Join Date: Mar 2018
Location: Still in travel... now Europe
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Year: 2003
Chassis: Bluebird International
Engine: T444E
T444E Problem with Starting

Hi,
For over a week, a mechanic in Malaga has been trying to find a solution to our problem with the T444E engine from 2002 in our Skoolie. The symptoms are quite strange. When we come to a place and do not start the engine in the evening, it has a lot of problems running. It starts for a moment and goes out. Then the starting tests take a little longer and the engine starts after about 10 seconds. Later in the day there are no problems with starting the engine. No matter if it's cold or it's still hot.
However, if we start the engine in the evening, there is no problem with starting it the next morning. The mechanic added an additional directional valve both on the inlet to the fuel filter and on the return from it. It seemed to help. However, after driving around 100km, the problem came back and we had problems starting the engine this morning. Maybe you have an idea where else to look for a solution to the problem? We would like to suggest something to our mechanic, because I think the ideas are slowly coming to an end, and we would like to finally go to Portugal.
Best regards FabLabNomads.
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Old 02-16-2019, 09:11 PM   #2
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Sounds like I fuel problem, either in the fuel system it self or a sensor sending bogus info to the ECU. Sorry itís so general... I understand the mechanical concepts. But Iím pretty new at working on the t444e.
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Old 02-17-2019, 06:47 PM   #3
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To me it sounds like the fuel that is supposed to be trapped in the fuel galley in the cylinder head is bleeding off over night. I've had this exact problem on a few CAT engines and it was the check valve where the fuel return line connects to the cylinder head. Sometimes the valve can be cleaned. Sometimes it has to be replaced. Tell me this. Do you prefill your fuel filters? That causes extra wear on your injectors because their first gulp of fuel after the filter change is unfiltered. Often times. Its the tiny pieces of metal from the injectors that sticks that valve open.

I've not worked on your exact engine but I've been a diesel mechanic for nearly 30 years.
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Old 02-22-2019, 02:06 AM   #4
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Thank you for your response. We have recently got our bus and I will tell you honestly that I have not changed the fuel filter in it yet. It is very hard to buy it in Spain and we are waiting for a shipment from Amazon. I will check the valve you are writing about when you change the filter.
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Old 03-03-2019, 12:40 AM   #5
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Engine: T444E
Hello again, we checked the fuel system together with the mechanic and most likely, there is no problem here. Is there any possibility of reading the error codes in a different way than by having a ScangaugeD device? In European cars it was often possible to achieve this by attaching a small lamp to the service connector and reading the error codes using the number of flashes?
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Old 03-03-2019, 08:43 AM   #6
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Chassis: B3800 Short bus
Engine: T444E
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Reading codes on IH electronic engines | BinderPlanet


This thread discusses reading the error codes using the diagnostic button. This is how I do it, too. Get a device ready to record video of the flashing light. Otherwise it's hard to keep up with the flashing light.


The list on that page is incomplete, though. Here's a PDF of flash codes for the T444e: https://www.dropbox.com/s/4t7l74lxd5...Index.pdf?dl=0
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Old 03-03-2019, 10:58 AM   #7
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the flash codes differed slightly from the old 94-96 3 box T-444E and the later models using the DLC (what yours is).. ive noticed some of the websites have the older codes listed.. I didnt click Jatzy's link to the dropbox but if its 97+ then it will be the correct codes for you..
-Christopher
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Old 03-03-2019, 01:27 PM   #8
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Oh, it's likely that the codes I posted are for the 3-box... How different are they?
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Old 03-03-2019, 01:59 PM   #9
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I noticed some of the higher number codes dealing with the computer itself are different, ie 500 and 600 series. The lower ones seem to match pretty well. So if it something like HPOP or ICP it should match.. this issue almost sounds like either fuel bleed down from the rails or possibly the HPOP drains down.. start and run then die sounds to me like the fuel line leading up to the filter drains down so it runs nice for a few seconds then dies when the fuel filter goes dry before it’s sucked new fuel up from the tank. The lift pump on these is mechanical and not electric, so it’s on the negative side of the fuel system.. there’s no primer pump that I know of on these.
Christopher
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Old 03-03-2019, 02:44 PM   #10
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Year: 1999
Coachwork: International
Chassis: 3800
Engine: T444EIEIO
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My 444E fuel dilema

I can't diagnose your bus, I'm not a mechanic.

Here's my 1999 T444E story. I drove my bus last March from San Antonio to Amarillo; from the auction to home. It never started again after that initial drive. Paid a mobile mechanic to take a look. He was stumped. Had it towed to the mechanics garage and they were convinced I needed a new motor. I was pissed - the bus ran fine all for 500 miles then it doesn't start. I pleaded with the garage and they found a short in the wiring to the fuel pump.

They called me gleefully announcing how nice the bus was running and that I should call off my search for a new motor. The bus needed no further work, no parts, just oil change and filters. WOW.


Short in the wiring. Go figure.

Good Luck friend.
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