Wes J
Senior Member
Cummins M11/ISM (it's a 2003, so not sure which it is) in an International dump truck.
Engine starts really hard. Probably cranks a good 10 seconds before it fires up. Start up gives a good puff of smoke.
On acceleration it stumbles and misses, especially around 1,100-1,250 RPM. Loaded it will miss a bit at any RPM when accelerating.
The smoke looks more blue than black to me. That seems very odd.
IMO, it does not have the power it should have and uses more fuel than I think it should.
Complicating the issue is a variety of electrical problems that have been either cause by, or not fixed by, the customer. Cooling fan runs all the time. AC clutch runs all the time and appears to have been hot wired to a switch in the dash. Turning off switch kills AC, but not the fan. Most HVAC controls don't seem to work at all. Starter relay has been cooked right out of the relay panel. Customer installed a push button instead of fixing (probably cooked due to long start time, I know they also replaced the starter recently).
Any thoughts? Customer swears it's a computer issue. I guess it could be. No lights on on the dash. To me it seems like a fuel pressure issue or possibly an air leak in the fuel system.
The blue smoke seems odd. I don't know if it's burning oil because it leaks so much (about a gallon a day). Turbo seems to be working OK.
They probably won't fix it, but thought I would ask.
Engine starts really hard. Probably cranks a good 10 seconds before it fires up. Start up gives a good puff of smoke.
On acceleration it stumbles and misses, especially around 1,100-1,250 RPM. Loaded it will miss a bit at any RPM when accelerating.
The smoke looks more blue than black to me. That seems very odd.
IMO, it does not have the power it should have and uses more fuel than I think it should.
Complicating the issue is a variety of electrical problems that have been either cause by, or not fixed by, the customer. Cooling fan runs all the time. AC clutch runs all the time and appears to have been hot wired to a switch in the dash. Turning off switch kills AC, but not the fan. Most HVAC controls don't seem to work at all. Starter relay has been cooked right out of the relay panel. Customer installed a push button instead of fixing (probably cooked due to long start time, I know they also replaced the starter recently).
Any thoughts? Customer swears it's a computer issue. I guess it could be. No lights on on the dash. To me it seems like a fuel pressure issue or possibly an air leak in the fuel system.
The blue smoke seems odd. I don't know if it's burning oil because it leaks so much (about a gallon a day). Turbo seems to be working OK.
They probably won't fix it, but thought I would ask.