CAT C15 ACERT 475hp MXS - low boost

Point well taken. New harnesses look like best idea, but it would be nice to find way to keep the oil out of the new one.

 

I have an 06 Kenworth and I have a case of super glue--don't leave home without it. Sounds like a good idea.

 

People who ran DYNO's, etc. a week ago and said they couldn't identify problem and I'd just have to drive truck until something happened called yesterday and suggested I might need a new IVA sensor and/or wiring harnesses.

I installed new IVA sensor yesterday that immediately generated Code 95 about Intake Valve Actuation System Oil Pressure. Concerned about oil pressure, I removed valve covers and had someone start engine for a few seconds while I watched it. Oil shot out of #3-4 actuator from empty small threaded hole. Accuator's under warranty so will ask that it be replaced. Am concerned about whatever came out of the hole, where it is, and if it could do damage if not found and removed. Will ask that it be located and removed.

(#3-4 actuator had been replaced end of March 2009--while on road, had to have truck towed in for repair--found out then that there was a TS Letter about replacing bolts and studs for rocker arm shafts and valve actuators because they could break and damage the engine. There were studs and bolts broken off, the rocker arm shaft was broken and #3-4 actuator was broken so they replaced bolts, studs, rocker arm shafts, and #3-4 valve actuator assembly then.)

Have missed three loads and am hoping that this gets resolved and truck can get to work.

 

Took truck in yesterday to get 3-4 actuator repaired or replaced. Turned out that there were 2 bleed screws missing from 3-4 actuator. They replaced the 2 screws.
Drove truck and made a hard stop to test boost and got a Code 94-non-responsive 5-6 actuator. Went back to have that checked and they found that solenoids on 5-6 were bad and they replaced those. Ran another cut-out test and all actuators were OK.
Truck is running fine with good boost at this altitude.

 

For everybody who took interest in my problem, I appreciated your time and the thought that you put into it. I know everybody has a living to make and it means a lot to me that you would take time from your free time to help me with my problem. It was great help.

Last Saturday, I was at a loss after being told they couldn't tell me what was wrong after running numerous tests and to just drive the truck until something showed up. I heavy haul and the truck would have been a road hazard. If it hadn't been for the information and analysis that I got from you guys, I would have been at a complete loss as to where to go. That information pointed me in the right direction and through a slow-learning curve I finally figured out what the big problem was and a number of other things that needed attention.

Thank you and I'll pay attention to the site to see if I can ever return the favor and also pickup more knowledge. This seems to be one of the few places we can get the information we all need. Thank you.