pete 379 with cat acert. egt /pyro temps 1100

If you are not getting enough air or boost it will raise exhaust temp. Sitting still idleing them up usually doesn't show much to any boost she has to be in a pull. Lack of fuel can also cause low boost. They feed off one another in laymens terms. Do you hear a loud whistle when driving and pyro is climbing. If so you have a leak between the pressure side of turbo and intake. Most likely a boot (rubber hose) that connects to CAC in front of radiator, or a bad CAC. Should get some black smoke from this. If no whistle that you hear look at fuel and air filters. Could be a turbo problem but they are usually more pronounced.

 

yes that seams very high, it should not cost more then 150 for both filters and they should be changed at least once a year, maybemoreoften depending on operation

 

I'm with Wore Out, it's probably a leak somewhere in the air to air, but to check the air filters just take the rubber elbows off where they go into the breathers, then take it for a drive and see what it does. If you don't have the plumbing to check the cac and boots, just mix up some soapy water and put it in a spray bottle and spray everything and look for bubbles.

 

Check everything wore out said, also check the turbos, in my case a piece of the exhaust sleeve wiped out the top turbo. when you drop a gear and get the rpms up around 1700 it should cool off to about 900*, the temp should climb as the rpms come back down. I'm guessing a bad leak or bad turbo.

 

yes.......

 

I was thinking about a bad turbo, would act similar to his symptoms but haven't seen it yet so I didn't want to post it. Just thinking how a compound set up works it sounded good in my head. Not saying this in a bad way but it may be best for the op to get his truck looked at. I know he wants to learn if for no other reason than getting ripped off. Its much easier to grasp with some one holding the piece in their hand pointing out why its bad and how to check it. Puncher had the best suggestion on the air filters, If I don't have or trust the indicator A short ride will tell without wresting them out.