ISX 2250 rough idle at cold temps

[northof60]

Thanks for the reply. From reading the posts from your link, sounds like the best thing to do would be to put the vgt back on and re tune by someone who knows what they are doing.

Saying that, i a dont think my customer would spend the money to put the vgt back on. Is there a way to tune these engines to run properly with an aftermarket turbo? Not looking for any horsepower gains, just a clean running reliable tune.