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Current version by: Cliff ,

Text:

I did the unplug thing early on with my '06 ISX. It did great. Later I wanted to put on a larger throated intake manifold from PDI to eliminate any restriction. When it arrived, it had a steel plate for where the EGR tube hooks up the intake. Evidently so it could be used on a pre-egr ISX. So, I took advantage of that. Still hooked up the EGR tube to the intake so it "looked" normal, but installed the steel plate between the tube and the intake, effectively blocking off everything.
I did the unplug thing early on with my '06 ISX. It did great. Later I wanted to put on a larger throated intake manifold from PDI to eliminate any restriction. When it arrived, it had a steel plate for where the EGR tube hooks up the intake. Evidently so it could be used on a pre-egr ISX. So, I took advantage of that. Still hooked up the EGR tube to the intake so it "looked" normal, but installed the steel plate between the tube and the intake, effectively blocking off everything.
 
Later at a Cummins shop for another issue, they plugged the EGR back up. The EGR had been unplugged so long, it had carbon buildup and had "frozen" in place so that the EGR failed in the closed position. So I left it plugged up. I did all this between 300,000 and 400,000 miles. The engine has 870,000 miles on it now. Oil stays almost out of the bottle clean for 10,000 miles before starting to darken. MPG's in the mid 7's all the time. Don't need the EGR, don't want the EGR, and I am not going to replace the EGR.

Status:

open

Original post by: Cliff ,

Text:

I did the unplug thing early on with my '06 ISX.  It did great.  Later I wanted to put on a larger throated intake manifold from PDI to eliminate any restriction.  When it arrived, it had a steel plate for where the EGR tube hooks up the intake.  So, I took advantage of that.  Still hooked up the EGR tube to the intake so it "looked" normal, but installed the steel plate between the tube and the intake, effectively blocking off everything.

Later at a Cummins shop for another issue, they plugged the EGR back up.  The EGR had been unplugged so long, it had carbon buildup and had "frozen" in place so that the EGR failed in the closed position.  So I left it plugged up.  I did all this between 300,000 and 400,000 miles.  The engine has 870,000 miles on it now.  Oil stays almost out of the bottle clean for 10,000 miles before starting to darken.  MPG's in the mid 7's all the time.  Don't need the EGR, don't want the EGR, and I am not going to replace the EGR.

Status:

open