Help low boost

[Marajin]

(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

I know of lots of trucks that have that style of tuning in them that run around with low coolant all day long. they are a lot of old trucks with minor coolant leaks. It was not the coolant light or low coolant that can cause this. Something else must have happened to the truck as well.