EGR Delete Info -- Educate yourself

[Bhullargp]

(08-13-2020 )Waterloo Wrote:  

(08-13-2020 )Bhullargp Wrote:  Hello everyone

I am an owner operator and i have a peterbilt 379-2007. I recently had my issue with pyro going very high and making the red light come on many times and i went to mechanic he told me to get a new turbo. I got new turbo installed but my pyro was still going into red then he did some fixes and the pyro stopped going into red but now in hard pull it reached up to 10 or 10.5 normally runs 7-9.

The main issue since i got new turbo is my boost it doesnt go over 25-28 in hills. I drive in British Columbia canada. My back pressure for jakes at high also doesnt wanna cross the same 25-28 psi. I also replaced air charger cooler cz there was minor leak but no change in boost even after spending all this money.


Please help me

Is this an ISX? Do you know what the mechanic did to the motor? How many miles on the motor? When was the last time an overhead was done? Head replaced? Any tuning on the motor other than factory? Any funny black boxes? is it an OEM turbo, or did they install something that was not meant to be there? As you can tell, need more info...

yes its an ISX cm870 and it is EGR deleted. initially I had trouble with my high jakes working at same level at medium with back pressure at 12-15 max. then I was suggested to get a new turbo and before that new turbo my pyro started going higher and higher as the summer came then I got new turbo with new software (as told by mechanic) now I dot know if that software created this low boost beacause the old turbo was making proper boost only problem with that one was pyro and jakes other than that it was making boosts unto 38 and used to climb hills at 32-34.


the motor was rebuilt at 1.7m and now it has 2.2m. new turbo was bought from dealership.