Cummins ISM not reading boost correctly? |
02-24-2017, (Subject: Cummins ISM not reading boost correctly? ) Post: #5 | |||
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RE: Cummins ISM not reading boost correctly? Scan gauge boost is electronically calculated, not actual. Did you replace delta P (pressure differential sensor?)? The one with 2 tubes on the intake manifold. Those tubes are notorious for clogging on the Isx and Ism. You can't clean the sensor, only replace. It's a key sensor and can throw ecm function. Does it cough or sneeze? I don't know how else to describe it, thats what it sounds like, very quick interruption in power. Some call it turbo cough. I had that problem with the Ism I use to run, egr tune up cured it. While your at it, exhuast gas pressure sensor should be replaced too. They're about $80-90. Other than that I would check for leaks in CAC that my be showing at high boost. User's Signature: 2010 386 Pete CM871, 13 spd. 3.55 | |||
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