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2 hours ago, Jody Scott said:

I ordered and will replace the speed sensor and the flywheel sensor tomorrow and see what that gets me.

 

Good place to start! Test the old one 500 ohms I believe! They also get clutch crap on them!

9 minutes ago, Joey Mack said:

A craked egr cooler. We used to drain the coolant, and remove the front hose off the cooler and put a vinyl glove over the port.  If it inflates, the cooler is leaking exhaust into the coolant. 

Thats a new one for me Joey good check! 

19 hours ago, james j neiweem said:

Volvo must be pissing their pants-Mack orders and market share were higher than Volvos recently!

All one pocket buddy! Its all about the money! 

15 hours ago, Jody Scott said:

I have replaced the transmission the other day and was thinking maybe the RPM sensor on the flywheel housing maybe?

 

Let us know what you find ! The flywheel sensor is a good first step!

So investigate this! On startup turn the key on observe the pistion on the VGT !  Is the vgt doing its self check? Is it going full stroke ? If it does not stroke out both directions it may be that the vanes are sticking and not allowing the turbo to regulate properly!

5 hours ago, navypoppop said:

Happy Birthday Joey! 

Yup many more bro! 

Maybe you’re pto is making noise! Likly a hot shift pto! 
just guessing!

2 minutes ago, Joey Mack said:

M-Drive is my guess..  

Joey  the point is guess!🤔info is good!

48 minutes ago, cfd511 said:

replaced 4 injectors and did nothing . then we changed the file attached tot he injectors and reinstalled and now we have power again. drove truck all day and for some reason it just randomly died at. a stop sign.

 

 

Have you checked for combustion in fuel?

What trans?

3 hours ago, Joey Mack said:

Hell yeah it does. I still dont remember 12 spring loaded pushrods. Just 6 on the exh only..

yup me also!

3 minutes ago, Joey Mack said:

No sensor, just the regulator 'Y' fitting..  definitely need to check fuel pressure.

thanks Joey! sucks getting old!

I would be checking for fuel pressure !  If your not getting any smoke ! Also don't recall if there is a fuel temp sensor on this year! Located on the return elbow! at the block on some!

3 hours ago, Joey Mack said:

20 PSI, if it will even get there, 

Yep!

16 hours ago, Joey Mack said:

For some reason my memory of 12 spring loaded pushrods is poor.  I remember 12 rigid, and 6 of each. Spring loaded only on the exhaust.  Its sad that I am unsure, as many of these as Ive done.  

I believe the spring load thing came about with ceramic lifters don't quote me on it just my vague memory on it !

My self I like to test the whole system! we had a cork for the turbo end of the charge air with a regulator and gauge  on it! Put shop air to it! And turn the engine by hand till boost builds  on the intake system ! this lets you test the whole works intake and charge air!

2 minutes ago, terry said:

Shouldn't put much over about 45 pounds pressure when your checking right?  terry

No need for 40 psi even ! if its leakin you'll hear it !

1 hour ago, Joey Mack said:

You wont see a CAC crack, you need to put air pressure to it. No more than 20 psi.  And have a windex bottle handy..

You can also use propane at idle there is no boost! And some vacuum!run a unlit torch around the charge air edges and welds! The rpm will rise if your in the area of a crack!

You could try installing the cal codes !

You can’t rule out a bad injector ! If it’s not throwing a code! 
just saying!

Check you air cleaner as well black smoke under load indicates lack of air black smoke on takeoff is normal but it should clear! If you’re turbo has a bluish tinge to it also indicates not enough air! All stuff to look for when troubleshooting!

Check all your grounds!