Cummins 605/2050 immediate RPM drop issue

[WICT800]

(10-21-2021 )tree98 Wrote:  I don't think your problem is programming related. Have you taken the air cleaner out and inspected the piping looking for restriction of some kind? What's the max it's boosting? Maybe take the tube off of the crankcase breather box (not sure of the actual name) maybe there's something in there restricting flow? Just seems like a flow restriction somewhere.

Boost is about 30 psi, everything seems to be ok as far as intake restrictions, in top gear the motor does pull nice and smooth as far as i can tell, the lack of check engine light is strange if it was in fact a mechanical issue and not a programming issue, the truck has only 19,000 miles on it and it’s done it since brand new. When I first got the truck the bad Cummins Smart Acceleration enabled and that caused some issues as well.