Hey all,
this morning my 2500hd started and ran drove it a little bit then it died, got it restarted drove to a gas station to get coffee. Now it wont restart. Turns over but wont start, even on starting fluid.
any ideas?

 

Hey bud, if it won't start on starting aid then 1 of 2 things have been lost. Either spark or compression. Is the CEL illuminated? If it is you need to have it scanned. Off the top of my head the only thing I know that would cut spark like that would be crank sensor.

 

After testing the fuel pressure ( which is good at 60psi) checking spark, pulling plugs and replacing the crank sensor the truxk still will not start, it tries but wont go.

 

Oh dang, how many miles on the rig?

 

243000 ish

 

Oh and I did scan it and it had a u0107 so I replaced the throttle body with a known good one.

 

Going after the cam sensor now, the odd thing is that the pcm hasnt set any new codes and the engine hasnt ran again but has been cranked on ALOT!
I am at a loss.

 

What is this? Its on the back of the intake, the top part pulls out a little bit, almost like a relief valve.