In cold weather idling it could take an hour to heat up! 10 to 20 min to knock the chill out of it is fine. Map sensor is in the intake tube.

 

you guys know what grounds i should clean, there is alot of wires in there. the truck acted up again so i took it to the local repair shop ( they do alot of the work on the gas co trucks as well as heavey duty) and had the tech put it on the computer. Every thing checked out, fuel pressure around 23,000, injectors are good, timing etc witch is great as all the expensive things are in good working order. So other than grounds you guys got any thing else to check ?