One week I had two '07 DT466's with the exact same issue in the shop, cylinder #2 high to low side open fault, low power, and smoke on acceleration. Pulled the valve cover and found that the injector connector was not plugged in fully, I suspect it was never fully latched and eventually the latch fatigued allowing the connector to back out. Now on the second truck when I plugged the #2 injector in a partial miss started on cylinder #6, cutout the injector on #6 and it responded but the rpm drop was not as much as the other cylinders. Fuel delivery pressure was 1 psi below spec, pulled the filter and found metal shavings in the housing. Replaced the lift pump and the problem was resolved.
Went out on a road call to a farm recently, an automated transmission locked into neutral. Plugged in with Eaton Service Ranger and it had an active electronic clutch actuator communication fault, I cleared the fault after checking power and ground to the actuator. I was able to drive the truck about 1/2 a mile before it set a mechanical system not responding fault for the ECA and shifted itself back into neutral. After having the truck towed back to the shop I finished the troubleshooting and we ended up replacing the ECA.
Rebuilt the pump on a water tanker for one of our customers.
"Something interesting I learned this past week. With a Bendix ABS system a sensor open code will self clear, however a sensor short to ground code will stay active regardless of the detected condition after the code sets initially."
ReplyDeleteSo this is cleared with the scan tool then? Probably a preservation strategy for the control unit, eh?
"Fuel delivery pressure was 1 psi below spec, pulled the filter and found metal shavings in the housing. Replaced the lift pump and the problem was resolved."
Good catch...it would be too easy to blow past that 1psi. It just demonstrates how close the tolerances are today. I might have been one of those who blew past it to something else but had to backtrack back to it.
"...I finished the troubleshooting and we ended up replacing the ECA."
So, the winding insulation had failed, probably. You got an initial distance and then the whole thing heated up again. Eh?
Yes, cleared with their software. I would imagine that is why they do that...
DeleteYou know what the funny thing about that fuel pressure is it only came up the 1 psi to the minimum with a new pump and regulator but it made all the difference in how the engine ran. Doesn't take much to cause an issue I guess.
Possibly, there were not any overheat codes for the actuator though and it is capable of setting them. Actuator temp read 101 with the software but I did not verify it with a temp gun. After driving it initially it dropped off the private CAN network with the transmission controller. I know it was heat related (I couldn't get it to occur again once I had it towed to the shop) but I think it was an issue in the control portion (integrated smart controller).