Hi Guys,
Since I'm new to the egr game I have a quick question. The tpi egr valve is in a bad spot to check but when I try to feel if the valve is open, should I feel diaphram right at the bottom of the valve or do I need to go up inside the valve before I feel it?

Thanks again

 

Ok, I can feel it and got it to move. My last question would be how much movement should there be, 1/2 inch, 1, 1/4 inch?

thanks