Paccar no pulling power

Why was the turbo replaced? Actuator got recalibrated during install?

 

Has there been any resolution for this problem? I have a 2013 Peterbilt with the paccar MX 13 non deleted. I've had it for 2 years and it has always had a low power issue on the top end. I've done a lot of work to it and have access to Davie4. I have been all over this thing with the computer and have taken it to several different mechanics and no luck. I do have it narrowed down to low boost. When it runs correctly, which is for short periods of time usually after a key cycle, it will get to 34-35 pounds of boost. When it loses the boost it will then only get to 29-30 pounds. I've changed the sensor before turbine, delta pressure sensor, boost sensor, cleaned the steel lines for both plus the sensor after BPV. I've changed the injectors and it had an egr flush early on after I bought it in 2020. I've also cleaned many of the other sensors that I can't think of their names. I've also checked the CAC for leaks and all is good. This is a seasonal and backup truck. It just turned 770000 miles. It starts right up and runs great. Has plenty of power bobtailing and if my trailer is empty its usually fine. However one day I was bucking a pretty hard wind and with the trailer empty it wouldn't even hold 55. Like I said earlier, if I do a key cycle, it will have good boost for a short period of time and then lose it. And to top it off there are no codes. Any help would be much appreciated. Thanks.

 

What engine mode is it in when power is low?

 

Normal running mode.