Many questions

[Lonestar10]

check the pipe that wraps around the back of the motor it has a short rubber boot that could have blown out happened to me last summer. have to buy the whole pipe peice with boot attached to fix. easiest way to see it will most likely be pull up the flooring and take the plate the shifter comes through out of the floor should be just held in by buncha bolts and some sealer. you should then easily be able to see the back of the motor where the pipe runs accross just above the trans bell houseing.

also check where the pipe comes off the EGR valve its held on by 2 bolts thjis can rust out and the pipe seperates from the flange.

the white smoke is because of exhaust leaks and the truck is trying to regen or raw fuel is being spit out of the cylinders while idling and burns off when under load. or 3rd its throwing oil out of the cylinders or turbo and that is burning off after idling and under load.


Emissions trucks are not built to idle period idling will cause an emission motor to have many issues and most of them being a complete royal PIA to diagnose.