isx torque guage questions

[TB3NNI5]

(02-11-2024 )schISM Wrote:  Where's Rawze on this one?

(02-10-2024 )TB3NNI5 Wrote:  The only problem i had was the truck was always chattery like it had no pilot injection

Let's start here, I don't think this was your only problem. Someone's trying to lock the ecm into a single mode with no pilot injection.

(02-10-2024 )TB3NNI5 Wrote:  it eventually through the months seemed to lose power and eventually i could only squeeze 85% torque out of it, i know these are generally vague readings but why would it use to push 100 and now only 85? What causes this?

Could be whomever hollowed out your dpf/doc didn't do a proper job of it or the mode control in your calibration is non-existent, vectoring into cold ambient, scr-warm up mode or thermal management trying to warm up those cans that were never addressed properly. Another telltale sign your working with a bad delete is 38 psi in a sustained pull. It may peak there for a moment but if it doesn't settle back to about 31 psi or less for a 500hp cm2350 your just asking for trouble. Even at 600hp with a large tier cpl# you shouldn't see more than 36ish or less boost on a cm2350 x101. The x15's, even less.

This is true, i have had it reflashed since and got rid of the chattery issues, i have not checked visually the insides of the cans but they do appear to sound hollow. And it has to be in a hard pull to see 38psi but it will hold 38 lbs in a struggle until you downgear and get the rpms up over 1500 or so.