STRYKER EXPERT NEEDED

[DTB Radio]

If its coming from the ECM, then there will be some way to block it at the ECM. Not knowing jack about the CAT motor configuration and parts location, I can't even begin to tell you how to do that, but if the ECM is the source, then there IS a way to block it.

 

[sleepwalker]

Keep in mind that it has to be something electrical/electronic generating the noise as you search for the problem. Here's an idea that I personally have never tried before, but might help in finding the source. Build or buy an RF sniffer probe, and look around for RF in the engine and dash area when revving the motor. If there's some way you can put the truck on a dyno and do this with a load on the engine, even better yet.

Has to be manifold pressure(turbo boost) 20 psi and above in order for the problem to appear.

Someone should forward this to Cat for what it's worth. They are very tired of me

 

[DCowboys]

If its coming from the ECM, then there will be some way to block it at the ECM. Not knowing jack about the CAT motor configuration and parts location, I can't even begin to tell you how to do that, but if the ECM is the source, then there IS a way to block it.

Hey Dave you have PM....

 

[desert rat]

Cat noise

I know this is a shot in the dark,but could the noise be from in tank fuel pumps ?

 

[sleepwalker]

fuel pump is mechanical ...gear driven

 

[desert rat]

I know the main pump is mechanical. Thought these new trucks have pumps in tanks to,for fuel transfer or something.