Egr at 100% open

[Rawze]

(06-28-2016 )Vin Wrote:  Do you see smoke coming out of the exhaust?

Actually, it is not likely unless your DPF is cracked. The DPF masks how much smoke your engine produces heavily.

(06-28-2016 )TeaspoonSean Wrote:  my dash diagnostic readout says "egr valve controller out of calibration" and insite is reporting an ordered position of 0 while the measured position is 100.

Is this just a sensor issue? Is this the impetus to do the milk money? Can I drive from Detroit to Laredo like this without doing harm to my poor old isx?

There is a way to check to see if it is permanently stuck in an open position...

You can always pull off the Venturi pipe and crank up the truck to somewhat test its positioning. With it running, it should be blasting hot air out of the feed pipe it at a full 100% with the venturi removed.

While the engine is still idling and the venturi removed, unplug the magic plug (the egr temp sensor), and you should feel the valve close after several seconds and the air blasting out of the pipe will ramp to a stop. This will tell you that it closed 100%. -- this will not tell you if it is sticky, etc. but you can at least confirm it is able to move and close.

If the valve has more than 500-600k miles on it, it is time for a new one anyways,.. that is the typical lifespan of them.

Driving the truck with the EGR valve stuck open will make a lot of black soot and quickly clog the DPF. It will also cause heavy amounts of soot to get into the oil.