C-13 cat fuel mileage questions

cat does not have egr to delete

 

Look for posts by Mr Haney & PDI. Stainless steel part between the turbos is a bellow.

 

The device you are talking about is a intercooler between both turbos. The air blows through the intercooler to help cool it down before it enters the second turbo. I also have a c13. Your serial number probably starts with KCB for that year.

 

I don't know what muffler you have on it. But it probably wouldn't hurt to put new on with low restriction. The factory put catalitic converts on them. They look like regular muffler but the insides are very restrictive. This got me about .2 MPG. The fuel temp wire people talk about didn't help my fuel mileage but it made the motor more responsive. The boost sensor wire people talk about all it does is blow black smoke doesn't help fuel mileage as a matter of fact it seemed to hurt mine a little. The best thing I have done for fuel mileage is put a bully dog tuner on it. It has raised my mileage up about .4 to 1 Mpg depending on what and where I am hauling. I have mine in a dumptruck. I can tell you when running empty I don't use hardly any boost and very light pressure on accelerator.

 

If you have turbo boost gauge that is a great help with trying for fuel mileage. There is a company called scan gauge. They have one that is much cheaper than watch dog. From the ad I believe they give about the same info to you. But I can tell you form my experience with the bully dog which also shows the same info the mpg the ecm reads is not accurate at least on my truck. It is off about 12%. There is a place in the menu to put in correction factor. I also know you talked about PDI with Mr Haney. I have never talked to him or PDI. But from all the good you here from drivers on this forum must be doing a good job. One of the companies I haul for had PDI do one of their newer trucks. The owner told me that was the best spent money on that truck. He said fuel mileage went up and power went up also.