clean out EGR valve

[bigcrunch]

Any one clean a EGR valve? if yes what method.

I am getting excessive flow code again.

 

[jremington59]

I just sprayed mine out with wd 40. Check the gasket between the egr valve and positioning sensor. Yours has the internal egr, correct?

 

[bigcrunch]

It's located on the upper rear manifold.

Anyone ever glass bead the inside of one? and pintle and seat?

Of course wash it out afterwards.

 

[Turdle]

On a 96 V8, Excessive flow code is caused by EGR position sensor, not a clogged valve. Check the sensor and linkage for binding.

In fact, the flow is sensed by the position of this sensor-the PCM has no idea if the valve is clogged or not.

 

[bigcrunch]

Turdle, thats good info to know. If movement is ok (which it is confirmed with vacuum pump opens with 5"hg) more than liklely sensor?