[Raptor]

Okay, now it makes more sense, I thought it was on a 91 car, not a 2G. It is actually just the differential pressure sensor for detecting the EGR function. On a stock 2G it is on the intake manifold. it is only still there so you don't get a CEL. If you had DSMlink, you could get rid of it and eliminate the light. Ask Eric about it when he gets down there today, he can explain in more detail if you like.