Anthony Corleone

On 1/12/2023 at 9:38 PM, Mackpro said:

The cam sensor and crank sensor work together. When one goes out it will still run but like you said, hard starting. I believe it’s like 8 seconds of crank time before it starts . 

I was told about that. So I'm going to replace both sensors and go from there. I will keep in touch to see if it works. Appreciate it thanks!

15 minutes ago, Anthony Corleone said:

 

Talked to a guy in the parts department mack dealership he said check the fuel check valve in front of the head. I pulled it off and didn't see anything wrong. I even left it off to see if fuel was pumping out the line which fuel is coming through line. 

Sorry for late response! I replaced fuel filter primer housing and still having a hard start. I was told it could be cam sensor and crank sensor. Pulled the cam sensor there was no sign of damage. Any help would be appreciated!

On 1/28/2024 at 8:56 AM, Joey Mack said:

yep, aerated fuel..  can you pump the hand primer before trying to start it, to see if it starts quicker, if the hand primer leaks, its no good.

I have a 2011 mack cxu613 mp7 and having a hard start.

It cranks over fine but it takes over a couple minutes to fire up. It doesn't have any codes or lights on the instrument panel.  Appreciate the advice!