04 Mack AI 350hp boost in and out heat problem

[Jeff McMillian]

04 Mack AI 350 HP empty or loaded turbo engaged goes in and out and heats to beginning of red on gauge stop and cools down quickly . Only codes is 3 injectors mis firing . Fan working ,Radiator ,air to air, ac condenser cleaned .Replaced map sensor / boost sensor, changed both thermostats , pressure checked air to air with no leaks . Could these 3 injectors that show misfire cause water temp heating problem . Thanks in advance for your Mack knowledge. Been a truck owner many years but new to the Mack game.

[Joey Mack]

do you have an infrared temp gun? if so, when it gets hot, pull over raise the idle up and check the water manifold at the rear of the rear manifold, and see if it is close to what the gauge says.  there may be 10-15 degree difference due to shooting the outside of the manifold and not the coolant. just curious if you have a gauge issue or sensor issue right now. 

 

BTW... your truck is a CV-713 not 513..  Jojo  

[Jeff McMillian]

I don’t have a gun but may be able to get one however this eaving we installed a numbered water temp gauge in addition to factory gauge .Thanks for your input 

[Joey Mack]

Harbor freight.  They work fine and arent $100.00

[Jeff McMillian]

Thanks