Review on Efficiently Functional: Delphi EG10099 EGR Valve for Optimal Performance by Mark Hayes

Installed on my 94 GMC 5.7. This solved the lack of acceleration problem, but whenever I started the truck would trip and almost die. I read on a trucking forum that someone had the same issue and recommended ACDelco 214-5073. I returned the EG10099 and received the ACDelco and the truck runs like new. The EG10099's vacuum port looks like a normal port; the one on 214-5073 looks like a regular port only the hole is the size of a hole so there is a physical difference but both say they fit the same cars.