Cummins ISM not reading boost correctly?

[Rawze]

(02-26-2017 )Mikesuburban1 Wrote:  No its not custom tuned. I just had it at my local cummins shop and they replaced the turbo and updated my ecm. I bought this truck used in july 2016 and i has been giving me problems ever since

You said it did it since the update? -- It is possible they could have put the wrong update in it. I have seen that before. They could also have gotten a b ad address or port setting to one of the sensors too. A lot can go wrong during an update if someone is not so good at it.

It is also possible they did not calibrate the turbo properly.

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I do not work on ISM. Maybe some of the other guys form forum can jump in that do and give some info too.