My truck is running like crap. I have my PPE set on level 6 and always have alot of smoke, but today when I stepped on the throttle it acted like I had a locomotive hooked to my hitch. No smoke, RPM's would slowly go up to 3000 and then finally shift. Boost wouldnt even hit 20lbs. T/H didnt help. tried different tuning levels. I have a suncoast stage iv. Is my tranny in a limp mode that doesn't set codes? If so, how can I tell that's what it is? thanks for any help. maybe i should have put this in aftermarket?

Suggest that you check the inter-cooler hoses first, may have a leak. also the fuel, air filter and MAF sensor. Any of these may cause problems such as you are having.

replaced fuel filter, cleaned air filter, cleaned off maf sensor, intercooler lines r good. Its weird, when the truck is below normal operation temps, tranny and engine it runs like a top, but once i drive a little while then it starts happening.