ISX 2350 485

[Hammerhead]

(02-02-2017 )zare6 Wrote:  Hi wasn't comparing boost pressures my cats are way higher (acerts) I was comparing fuel mileage, I ordered a new Imap sensor and going to try that, I own a successful environmental construction company and I am far from broke however what got me here are cat engines, this is the first Cummins in the fleet. [/i]

Well, an IMAP sensor is not a magic bullet.
An IMAP is a starting point. A very key point, every single air/fuel ratio, timing, emissions, combustion manager, misfire prediction, EGR %, turbo closing %, you name it ALL BEGINS & ENDS with the IMAP. It may be the foundation, but it's not the entire equation. Think of it like this: E=M. We all know the rest of the equation, but without the "C2" it don't mean jack.
Perform a thorough EGR tuneup on it. This means new; IMAP, exh gas b/p sensor, delta p sensor(EGR diff press sensor), EGR system removal and cleaning (good god this is a messy job), overhead valve adjustment and component inspection, Insite forced regen, and then you are on the right track. It sucks, but after treatment systems require maintenance. I don't give a rat's backside what the dealer told you, cause I learned the hard way.
Diligence.
Maintenance.
Care & Attention.
With these systems intact, you have the above three legged stool. You're smart enough to know what happens to a two legged, three legged stool.
It's a nuisance, I know, but it must be done.

And I don't care what anybody says, Cat is our biggest customer, and their system are absolutely NO better. Welcome to the modern age, where the EPA is trying to mandate reliability out of our business. As far as they are concerned, our engines are soot filters that require changing every 400k miles.