2008 lmm issues

[ecc_33]

Got a 08 that has no dpf cat or muffler. Tuned all codes out of it with efi live and its fine for the first few start cycles then will cut out and miss like its starving for fuel after a few key cycles. I am at my wits end with this thing. I don't understand how you can tune a truck and its fine for about 3 or 4 starts then it just starts acting up. It doesn't make since.

 

[catman3126]

Post your tune?

 

[Kappa9012]

are you sure it's not something simple like a fuel filter?

also double check all of the dpf related codes etc. Isn't there an option to turn off the MIL,, and one that turns off the MIL as well as no action taken by the ecm?

 

[gmac32]

check the fuel lines under the drivers door and by the driver's valve cover. I had the kinda the same problem with an 08 and they were sucking shut on the bends.