trackdoc
Well-Known Member
- Joined
- Aug 8, 2011
- Messages
- 99
- Location
- Ireland/Kyrgyzstan
- Occupation
- Currently working as a HD Mechanic Trainer in Kyr
Hi there, I have a QSX15 Cummins with 6000 hours on it in a John Deere forager.
Over the last 2 seasons it has started to blow a constant haze of black smoke.
I have checked the cam timing, set the injectors and valves (2 times), changed the intercooler, done the injector cut out and found number 2 was a little weaker than the rest.
Installed a new injector still smoking.
I have 28 psi of boost, and 280 psi of fuel pressure when in a heavy stall.
Installed a new turbo.
The engine is running fine and I would not say it is down in power very much, but it aint as sharp as it used to be.
It is weird in that it won't smoke all the time, some days no smoke and others it will haze when under a light load.
The ECM software is standard, we have owned this machine since new and it has never been messed with.
O nearly forgot, ambient temp/ press sensors new, inlet manifold temp/press sensor new.
The thing seems to be over fueling a little, I would say she is using a little more fuel than she used to.
I know a lot of people would say to fit a full set of injectors, but would like to hear from people who know this engine.
Thanks
Over the last 2 seasons it has started to blow a constant haze of black smoke.
I have checked the cam timing, set the injectors and valves (2 times), changed the intercooler, done the injector cut out and found number 2 was a little weaker than the rest.
Installed a new injector still smoking.
I have 28 psi of boost, and 280 psi of fuel pressure when in a heavy stall.
Installed a new turbo.
The engine is running fine and I would not say it is down in power very much, but it aint as sharp as it used to be.
It is weird in that it won't smoke all the time, some days no smoke and others it will haze when under a light load.
The ECM software is standard, we have owned this machine since new and it has never been messed with.
O nearly forgot, ambient temp/ press sensors new, inlet manifold temp/press sensor new.
The thing seems to be over fueling a little, I would say she is using a little more fuel than she used to.
I know a lot of people would say to fit a full set of injectors, but would like to hear from people who know this engine.
Thanks