2008 Pete 600 C-15 Pulsing idle, DPF swtich, Jakes

Thanks for the reply. The best one I have is a front shot but should give you an idea of what you are looking for I hope? It's filled in quite nicely. I'm assuming I'm seeing the same thing you are refering to? I have to pickup the truck tomorrow. I'll be out of reach until I get home in two days. I'll can post more pics if you need? Please let me know. Or, pm me your email and I will email you the pics at that time.

Hope this helps.

 

It does not appear to be.

 

Thanks. Apparently, it regens constantly as it never seems to quit. This too is normal?

 

Thanks for the reply.

Here was the repair taken directly from the printout from Cat which has NOT fixed anything. Again, this is spuratic and sometimes will go several miles without incident. The surging is random and happens upon first startup of the day after sitting overnight. Sometimes it doesn't occur at all:

Test drive with laptop hooked up. VVA test showed #6 not ok. Adjusted valves, VVA and jakes, found #6, #5, #4 tight. Test run VVA still came back #6 not ok. ECM had no faults logged or active until you did the test. Cylinder cut out test came back ok. Engine would regen ok. Fuel pressure was good. Engine sounded good when it was running except when VVA test cut out #6. Then it would surge and was not as strong as the rest. All the other VVA's worked good.

Moved #5/6 actuator housing to cylinder #3/4 and move #3/4 to #5/6. Ran actuation test and problem moved with actuator housing. Moved #3/4 back replaced #5/6 actuator. Test ran truck and check engine light did not come on.

What do I do now?

 

Thanks. Had Cat reprogram to activate when accelerator is released. There are many options as to when/how the jakes activate.