Heavy Equipment Repair Questions? Ask an Expert Now.
I have a 2005 International 4300 with a Dt466, the truck will run fine for hours then it will stall.... like the exhaust is suddenly plugged or the fuel was just shut down to it, it has a new high pressure pump, o-rings on the rail, new fuel filter, new filter housing o-ring and cap, cleaned the pre-filter, scanned for cods... No codes which tells me its not a sensor or wiring problem? right? Ive been reading a lot tonight about the fuel pressure regulator and a check ball?? could you please give me your opinion and elaborate on the regulator and check ball.
Already Tried: changed the High Pressure oil pump, fuel filter, high pressure o-rings in the rack, filter housing cover, pre filter strainer, cleaned the tanks, replaced all fuel line o-rings, replaced the EGR Valve and the Waste Gate Accuator
I can try and assist you with your problem. I have a few questions for you also.
The fuel pressure regulator is a spring with a check ball inside of a brass fitting mounted normally on the fuel filter housing. It is the return side of the fuel system..all it does is hold pressure in the rail and primitively regulates the fuel back to the tank keeping positive pressure in rail. This may not be a fuel related problem, and could be a high pressure oil circuit fault..
Does the tractor fire back up right away when it dies, or do you have to let it sit for awhile? Do you still have access to A SCAN TOOL? Is there any external leaks on motor? Did you check and clean your tank vent line? Would also check lines for air leaks from tank to engine. Does it die at a certain fuel level, like half a tank?
Yes we have the new Nexiq with international software installed... The truck does start right back up most all the time except last night it had to sit for nearly an hour until it would restart, then it idles fine, in neutral it will accelerate fine and will hold 2200 RPM for long periods of time but will occasionally shudder and or falter. We looked at the Data Stream from the cam sensor, injectors, injector control pressure, all appears well?? 1900 psi at the rail, no active or inactive codes... Has to be a mechanical ?? This one has me stumped.. We are experienced and Certified Diesel Techs.... But I've never seen this before? Seems nothing is out of range though this problem continues every day???
I found the problem, it was a broken wire to the ICP intermittently loosing contact and shutting down, the periods of time to wait and restart was coincidental... after the replacement of the pigtail wire from the harness to the ICP the problem has went away now for 2 consecutive days, which is the longest this truck has ran consistently in over a week!!
I do appreciate your help and expert advice and will bookmark this web page for future use.
I am surprised you did not receive a code for this. I have also seen the ipr and camshaft sensors weep oil into the connector and create problems also.