EGR stall test question

[zukitrek]

I recently did a manifold gasket change and cleaned everything down there including the EGR passages and valve(but not like a thorough clean) but did not check the EGR mod valve cause car never threw code 51. I assembled the whole thing with new gasket set and started her with good results, idling at 800, good acceleration, in other words everything ok, until I got the dreaded code 51. Before no code, after tune up yes? WTF?

I did my stall test and the RPMs lowered and the car shakes but it never dies? I cleared the code and removed the EGR valve again and cleaned it overnight to get all the carbon buildup out. I then redid the stall test with same results. Car still running fine. Then I got the 51 again. I still need to do the bark test.

Does the stall test is suppose ti kill the engine?

Thanks