3406E warms up looses boost ?

[Rawze]

(12-11-2024 )Heavyhauler Wrote:  ...Buy new stacks to lift the EGTs to start ?

just generalizing here...

= = Turbocharged engines need as much free-flowing exhaust as possible, post turbo, to prevent fuel efficiency losses and trapped heat. Purposefully causing any exhaust restrictions, especially to try to slow down a turbo, is severely harmful to fuel efficiency and engine/turbo longevity. If the turbo is over-spooling, then it is either the wrong model for the engine,.. or its being adjusted improperly (via wastegate, vgt setting, bad ecm programming, etc).

= High fuel temps can play a role in fuel mileage losses, but not so much power loss unless its extreme. Also, many commercial diesel engines fiuel system are designed to warm the fuel, via return lines, passing thru cylinder head or other components before returning the fuel to the tank(s) to help prevent cold weather gelling, keeping the tanks warm. So, if the cylinder head is overheating (bad programming, overboosting, poor coolant flow, something wrong, etc.) then the return lines on the fuel system will get too hot too.

== fuel temps can get also excessive if the pump is having to over-work to make up for internal leaks .. such as leaky injectors, common rail leakage, fuel pressures are higher than they should be for whatever various reason, or there is some other excessive flow issues (too much flow bleeding back to the tanks, or back around to the input of the pump).