Freightliner Cascadia 2013 DD13/ Fuel pump issues

Hello,

I recently purchased a Freightliner Cascadia 2013 DD13 Engine. I’ve had the truck for 2 days & recently went to my local mechanic to do a PM Service. After doing so the truck had trouble starting, I understand certain. Times air can get into fuel lines of truck if filters were put on improperly. After 30-45 minutes we finally got the truck running and changed the filters again. It still gave some trouble but eventually it became steady. My mechanic told me my fuel pump is weak and it shouldn’t have taken that long for the truck to turn back on.. I purchased this truck from Penske. The truck has low miles and was a leased to a local customer throughout its life span. What can I do to make sure my fuel pump is isn’t bad? Any troubleshooting or advice l. Any beneficial advice would be really really appreciated!

TRYING TO
KEEP IT MOVING!!

 

Apparently They tried but the tool itself was broken.any thoughts how I could troubleshoot the issue myself.

 

The truck turns on fine now, but him telling me my fuel pump is weak is concerning me.

 

@AModelCat thanks for thread link.

 

Appreciate your feedback, guy is notable in the area, and trusted him. I guess sometimes they like using a scapegoat when they screw things up. Going to start looking for a more reliable mechanic. He did spray start up fluid into engine breather a few times, now that worried me.