having some troubles with a turbo that was installed

[rideordye929rr]

i just put a turbo on my 99 dodge ram. it has a 360 with 4:56 gears 325/70/20 tires. A t61 turbo 24lbs injectors and the computer has been flashed. im have problems with it running when the temperature outside is below 40 degrees. when the truck is goin down the road it starts to run really crappy then when i get into it it seems to clear up. when the truck starts to run crappy my air fuel gauge is all over the gauge. so far ive replaced the map sensor the engine coolant sensor and the intake temp sensor. my truck seems to be throwin the po108 code which is the map sensor. ive replaced it like a month or so ago. it only does it when its cold or if im pullin a trailer mt or loaded it doesnt seems to matter. and it pops and cuts out when i get into the throttle...if anyone has any ideas let me know. im kinda stuck in a rut on what to do

[speeduphoria]

just a question but is the map mounted in a place so that water or condensation can not get into it?(so the wires are facing down. Not sure other than that, if you have a wig welding tip you could place that inline before it to see if it helps, but I highly doubt thats the prob