Help 2006 dodge 2500 cummins
 

My sons 06 2500 cummins wont start after a cold night unless it's plugged in. Is this the grid going bad? Had pressure test done and replaced an injector last year. It does have a tuner on it. Once it cranks in the am the whole day it will start even after sitting at school Any ideas? ThAnk you in advance.

Likely a more worn injectors. We can test them. you can unplug the FCA and see if it helps. Batteries are probably good, but worth checking to make sure they are strong.

:welcome:

Did you check to see if any codes are showing ?
Turn key on and of 3 times.