thomastractorsvc Posted June 9, 2018 Share Posted June 9, 2018 Been working " Big Ugly " a lot and had it in to the Mack dealer as they were doing overhead specials for$475. While it was there I had them check the "jake" as it was starting to cut out and do a service. With in 700 miles of having it in I had started losing power and EGT went up to about 1000. I pressure tested system found leak at the air compressor inlet separator/filter valve. Got that fixed and installed a boost gauge. Hard pull 90 to 100K I am getting 30 psi boost egt is 900 to 950 no smoke, temp gauge shows about 190. If I let up and baby it egt about 850 to 900 boost about the same temp stays around 185. Oil pressure around 60psi both ways hard or babying. If I baby it the shut down light does not come on, if I pull hard it will. the lighting bolt does not come on, truck does not lose power, does not shut off. If i turn truck off it will reset. I have checked coolant as Superdog thought they may be the issue, I checked wiring to the sensors and unplugged the pin plug on the pump and checked the wires all seem good same with the ecovance. What other sensors would make the light come on without shutting the truck off or throwing a code? Quote Robert"I reject your reality and substitute my own." Link to comment Share on other sites More sharing options...
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