DoubleFrame

I ran a ground cable from the top of the ECM mounting bolt to the frame and she starts right up. I believe I found the broken cable on the engine ground below the starter. I’m getting ready to fix that now and just need to buy a bigger connector because there are like 5 cables to that ground connection. Thank you for your help.

Thanks Jojo just tried that but in my trouble shooting I have discovered that when I touch the ECM to the intake manifold I am able to start up the truck. It seems to be a ground cable that hours to the ecm. Not sure which one is it yet. Thanks

Hey guys I hope to find some help here. I have a 2006 CV713 that is not starting. I have found that when I push down on the top harness plug on the ECM the truck starts right up. I’m trying to figure out which cable is bad, does anyone have a pin diagram for the ECM? The harness is on national back order!

We use closed shoulder JKTyre JetSteel Indian drive tires at 120 psi. I’m going to put them at 110 psi and see if that helps.

I also have an automatic with a Hendrickson haulmax suspension that has lockers and I don’t have this issue with that one.

I’ll try this out this week.

can’t move them by hand, I had the camel back suspension redone a couple of years ago. Twinkies are good.

Power divider is engaged before

This is a common denominator, they all have the diff to frame torque rods on the Rear Rear. I’ll definitely try removing them on a couple of trucks.

Thanks for the response, I’ll look at those details this weekend. here are some pictures of the trucks

All of my trucks do it, I don’t see many hired trucks with this issue. It’s worst when empty.

I have several dump trucks (Granite E7 350/ EF 8LL/ 4.30 ratio/ Hendrickson suspension) and a couple of AI 400/ maxi torque T310/ 4.17 ratio/ camelback. I’m having trouble with my trucks getting stuck a lot, we are in Florida so the dirt here is sandy. When drivers go off road the trucks start bouncing as soon as it hits a soft spot and we watch other trucks go by without any issues. We have tried the mud and snow button (ATC) and the Off Road button, power divider. Tried driving in low gears, higher gears and the trucks still bounce like crazy like it’s trying to get traction but it can’t so all it does is hops until it gets traction again. I’ve asked drivers to just get pulled out by the dozer or loader as I’m afraid they will break something. I’m not sure what else to do so I’m coming on here to ask for your recommendations. What are we doing wrong? What can we do different to prevent the wheel hop or to get traction? Thanks

Sounds like I’m having a similar problem. The truck starts and idles good but stumbles and hesitates on low RPMS. I just changed the exhaust manifold so I had to remove the injector tubes. I purged all of the lines before starting and then several times after thinking it could be air in the fuel system. Additionally I had to change the fuel priming pump because it started leaking. It’s been two days now, no codes yet.

Just wondering if anyone can help me troubleshoot flash code 2-9 Combustion Air Humidity on a Mack AI engine. No other code.

Does anyone know where can I find the service manual for the suspension? I have a 2006 Mack CT713. I think it’s the same suspension setup as a GU813. I need to replace the front springs? Thanks