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High RPM tune - 2010 6.7 cummins

Puesta a punto práctica del diésel

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1986 Vistas

Hello all,

Ive sucessfully gotten my truck to turn 4500-4600RPM on the tach while in neutral/park. I am facing two issues during a test drive.

first issue;

Testing the truck in manual mode 3rd,4th gear WOT it will only Rev out to 4000-4100RPM. I have looked over the limit tables and do not see anything that should be stopping it. It also seems like the mm3 datalogger will not catch RPM over 4380. Over this threshold it seems to drop out on the log(but revs to 4500), then as the rpm come back down it re appears on the log.

[img="blob:https://www.hpacademy.com/a5264ebc-57d2-4cb3-974f-c19181b8fc1b" alt="" alt="" ]

Issue 2 ;

I am able to do a pull up to 4100rpm on the first run, but then after that it seems like the truck lacks power. I tried doing the exact run again in manual mode but can only get 3500RPM out of it. there are no engine codes. I data logged it and it seems like the rail pressure drops out. Again i looked at the rail pressure limit tables and do not see anything that it hit that would make the pressure relief command to open.

[img="blob:https://www.hpacademy.com/66648040-a769-4aae-8254-a445d3b5f075" alt="" alt="" ]

any insight would be great.

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last snip is about a 400 bar deviation

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