Into the @m*m^2

[Precisionw900]

(01-05-2021 )Rawze Wrote:  if it has delete programming in it then it could be over-boosting all the time.


Besides that, you have a flying brick... if your worried about fuel economy then you should not have purchased the least fuel efficient truck money could buy.

I agree with you no doubt on a w900 being inefficient but this truck stays local with very little use above 60 mph. It was a low mileage, well taken care of and fit what I was looking for.

I’m just new to the isx as all I’ve ever dealt with is the L10’s m11, n14, and a little with a ism. I took your advise and working on a egr tune up right now. The truck cane from Cali so of coarse it had an after treatment system on it. Once removed I had my local Cummins dealer install what he said would be latest update of factory tune for cpl 8285. Should I assume truck is running in top order with just that ? I appreciate any and all feedback. Teach me some thing Rawze. I’m trying to learn all I can.