Nothing I fixed the stuck flap issue.

I'm merely interested in better understanding the how a system detects the actual EGR operation. And would like to make a Mod.

This is my what if "

Keeping the EGR, it's wires and vacuum lines connected, attach a small air filter to EGR intake pipe, and block the exhaust from the down pipe. This would then allow the EGR valve to open and close normally letting in Fresh Air rather then exhaust into the intake manifold. No change in Man Press, unless it can detect the ambient pressure as being different then that from the down pipe.

Unless there are sensors which could detect the drop in temp or a similar gas sensor to a O2 sensor, it should work. I may be missing the obvious. I just hate the idea of clogging things up with this soot and goo.

I do run Delvac1......