Qsx15 turbo wastegate control valve?

[Rawze]

(11-01-2024 )Moffat Wrote:  It is stock. Any altercations have been done only temporarily as a test. And no way to dyno a tractor with no pto. Also I’ve had cummins out to watch the computer while driving under load. They were the ones who suggested intake sensor. Had a third paty mechanic who was the cummins master at peterbuilt out. Suggested barometric pressure sensor and reflash thinking the file might have been corrupt on ecm. I’m assuming one of these mechanics watching the computer actually knew something about diagnosing their engine. Cummins also came out to diagnose the fueling and metering actuators. The closest test you can do on a tractor like this is hook a similar unit to a similar implement and compare. We have a 375hp 9280 with 855 cummins that would be very comparable in pulling power

it is a mistake to put too much trust in those OEM techs and assuming they can tell you what its doing. They are blind as a bat!@!!, ... as they are not allowed to access it thru things like CT, and only use Insite or some other half.baked crap which is mostly useless with those kinds of issues.

5 MINUTES ON A TEST DRIVE WITH MY LAPTOP AND I COULD AT LEAST TELL YOU EXACTLY WHAT THAT COMPUTER WAS DOING ... WHY THE FUEL/POWER WAS NOT ALL THERE ... AND WHAT SIGNALS WERE CAUSING IT!!!. There are more than 150+ reasons that the ecm might hold back the fueling/power .... and the fuel-air-mix (your turbo) being only one of them.


(Page 54 in this document is what I am roughly referring to)...
REF: http://rawze.com/forums/showthread.php?t...5#pid67395

The 570's have many of those same settings to check. The names are just different (older standard), and some of it (like the AECD) is in RAM memory only on those things, but most all of it can be monitored.

How about someone calling back up those OEM blind-mice that are doing nothing but guessing.. and ask them some real questions that are related to the issues. Things like what operating mode(s) was it running in?.

... and what was the hex codes for commanding the 'CBL_Fuel_State?. What was the transition codes during hard acceleration and at max output?. Things like fueling quantities, .. what was the AECD state(s) that were active on it and what effect they were having on the engine output. Things like alterations to the fuel-air-mix, turbo speed vs. charge flow inputs, etc. monitoring, fueling, etc.etc.etc

I.E><<-- NONE OF THOSE BLIND-MAN MECHANICS AT THE STEALSERSh$ITS CAN TELL YOU ANY OF THAT BECAUSE THEY ARE NOT ALLOWED TO ACCESS THOSE THINGS!@!!!.. THE OEM PLACES ARE ABSOLUTELY NOT ALLOWED TO SEE WHAT IS ACTUALLY GOING ON INSIDE THAT THING (VIA CT) SOFTWARE... NOR HAVE THEY BEEN TRAINED TO PROPERLY TO DO SO!!!

i.e.> Read what I said above and do those things that can make a difference in how to find it instead of blindly trusting using a bunch of clueless, kept-in-the-dark blind mice mechanics at the trash-can stealers$its.

-- and has anyone pressurized the whole intake system, etc. and made sure there were no leaks?... and not just the CAC?. Anyone removed the exhaust behind the turbo to see if it picked up some boost level?... to see if the exhaust was restrictive somewhere unexpectedly?.

- Has anyone done any injector leakage tests on it?. ref: http://rawze.com/forums/showthread.php?t...8#pid67948