Help low boost

[dbl overdrive]

(02-23-2016 )gonzo1949 Wrote:  Hey guys I need some help figuring out this low boost issue. Was driving up 91 in Connecticut when I got the low coolant warning. Pulled over right away and noticed it was a little low. Filler her up and I was on my way. Noticed right away that I no longer had full boost. I don't know if the reason was the coolant light. Either way the rest of the day I only had about 20 lbs max. No check engine, or anything else out of the ordinary. The truck does have the @m*m^2 installed and the only thing I saw strange was that the ecm was commanding 5% for the actuator the whole time I was driving and logging? Any help is greatly appreciated

Hi gonzo1949. Have you determined where the coolant is going? I would look at turbo travel as well if the turbo only goes to 5% at all rpm's. You would need to pull the actuator though unless you use calterm to manually control it to see if it's moving.