ScottG wrote:
Yea, you loose too much turbo drive pressure and the boost goes down but the engine is still getting the same amount of fuel. So the EGT's go up a lot.
Sorry but even on most 20 year old diesels the amount of fuel put in is dependent on the amount of boost pressure. This is a ISC... electronic controlled and it's smart enough to only put in as much fuel as the engine can burn based on the boost pressure... no increase in EGT.
OP, I had to replace my manifold at 55K miles because of a crack... this is a common problem on the Cummins 8.3, ISC, and ISL.
A can of Kroil or PB Blaster applied over the next week (including the turbo bolts) could save you a lot of money.
