5.9L Engine Club
#241
#242
#244
#245
P1494 is a Leak Detection Pump Switch or Mechanical Fault.
and mine comes from the EGR valve...i dont believe you have EGR
and mine comes from the EGR valve...i dont believe you have EGR
#246
I thought all trucks have to have an EGR valve, but to come to think of it, I never saw one... After doing some reading that code could be caused by a vacuum leak, so I need to find it and see if the code goes away. I have that nipple cappped right now and the truck is running fine but need to find it.
#248
#249
#250
there is a plate mounted to the bottom of the manifold. the gasket its between the plate and manifold. the poor design of aluminum to steel makes it expand differently at tempretures, hense enough pressure to blow through a pocket when expanded, in end blowing the plenum gasket which aloows oil to leak into the manifold, which will foul plugs, kill 02 sensors, clog the cat, maake it runpoorly, and get very poor gas milage
hopefully that made you understand
hopefully that made you understand