This topic contains 6 replies, has 7 voices, and was last updated by Daran William Moghadam 2 months, 1 week ago.
- December 15, 2011 at 11:28 pm #25712
Hello, we have a 97′ International Blue Bird with a T444E 7.3 DIESEL, Came in as a no start. Checked oil pressure 2200 PSI, FUEL PRESSURE during cranking 45psi. Will start on ether, but continued use will cuase it to backfire. replaced fuel filters, no change. Removed HPOP lines and found clean oil inside HPOP, but rest of oil is black. Oil reservoir is full. Rechecked Oil pressure and found it does climb to 2200psi, but then falls off. Thank you in advanceDecember 16, 2011 at 2:36 am #28182
I have run into this problem with the 7.3L in Fords, and it is caused by weak injectors. If when cranking the unit there is a ton of white smoke pouring out the exhaust it is the engine not getting enough fuel, and since fuel pressure is at 45 psi the only other cause is injectors, usually if it its low oil pressure an ipr unable to build pressure during crank code would be present. I hope his helps.December 16, 2011 at 12:06 pm #28183
On the 444, where the high pressure oil lines go into the cylinder head, is a fitting, that has a small screen in that fitting. I have seen them get clogged up, and cause the same problem. It is a fast check, and easy to clean. Hopefully that is your problemDecember 17, 2011 at 4:37 am #28186
That was a good question: what did you see for smoke?
If there was no smoke while cranking, you need to ask if the electronics are doing their job.
If there was no smoke, that should tell you that the injectors are not being energized by the computer. You may need the proper scan tool to perform the injector buzz test to confirm that the signals are there to fire the injectors. When all the injectors that seem to fail to fire, I would think it is an electronic or computer problem.
HUEI injection systems are not easy. While the IH and Ford HUEI systems are different, this site may help: http://powerstrokehelp.com/
By the way, using ether on these systems is definitely a bad idea.January 3, 2012 at 2:14 am #28207
Hi there did you figure out? Let us know what was the problem. All the best.January 27, 2012 at 10:35 pm #28246
Hi Did you check for codes ? A bad CAM Sensor will cause a no start.September 12, 2019 at 4:10 pm #51134
Daran William Moghadam
trouvble codes 612,622,532 ipr or can sensor i replaced the cam sensor would it go bad in week, noticed after installing the cam sensor it ran good but thenext day took a long time to warm uup then ran good , now it just won;t start put starter fliud in and it starts and dies, flash code 532 is that a bad ipr sensor?