Question on my LMM 2009

[Supermoto68]

So I may be chasing something that is not even an issue, but I wanted to ask. If I floor it from a stop the truck spools up rear tires start spinning for about 10 feet, then truck falls on it face and starts respooling slowly again. I have minimal mods, air filter, exhaust, programmer, airdog fuel pump. This is my first GMC truck maybe this is normal?

 

[2004LB7]

I'd replace the fuel filter first. If you have a scanner that can read actual and desired pressure then monitor that while the symptoms present.

Clean or replace MAF sensor. Air filter?

 

[Supermoto68]

I'd replace the fuel filter first. If you have a scanner that can read actual and desired pressure then monitor that while the symptoms present.

Clean or replace MAF sensor. Air filter?

I run the air dog duel fuel filters and they are new, the airfilter is aftermarket k&N clean, I will check MAF tomorrow to see what it looks like. I have the mini max programmer I think I can see the fuel pressure will watch what it is doing.

 

[2004LB7]

Oftentimes that issue is fuel pressure related. But can be air restrictions (or maf) too

 

[NC-smokinlmm]

Traction control is a bitch, that button doesn’t really turn it off.

 

[Supermoto68]

Traction control is a bitch, that button doesn’t really turn it off.

2009 Duramax has traction control ? Seriously seems like you maybe right

 

[2004LB7]

I thought had the most restricted or torque limit of all the gears. Sounds like it has plenty of power at first then falls flat. I don't think traction control will let it go that long before pulling back. Mines an 08 so I don't have a lot of experience on how it was implemented for 09 and up

 

[NC-smokinlmm]

LMM Traction Control?

I have a LMM that is cutting the power when the tires spin this is a early lmm with no traction control on/off button what can be done to fix this? It has EFI and it is not a fuel problem the best i can tell.

www.duramaxdiesels.com

 

[2004LB7]

LMM Traction Control?

I have a LMM that is cutting the power when the tires spin this is a early lmm with no traction control on/off button what can be done to fix this? It has EFI and it is not a fuel problem the best i can tell.

www.duramaxdiesels.com

That's a good one. I always taper off the fueling in the table so it doesn't drop out hard. Just kinda doesn't go anymore higher. It finds a happy medium where the load and RPMs line up with the right fuel. If the load increases then the RPM drops down into more fueling cells which keeps it steady.

Stock drops out pretty hard a little over 3k rpms. Extended the fueling out and tapering it off can fix the issue if that is his problem