I know this is an old thread, but good info.
I just went to smog my dads 3rd gen(1990) truck with 22re, and it passed everything with flying colors. HC's were low, everything was low and passing. THe tech checked the EGR, and the EGR worked when he put vacuum to it. He flipped the line around, and reved the motor. told me it should be getting vacuum, and it wasn't. so he failed it. I was under the impression the EGR only gets vacuum under load. am I wrong? Do you see vacuum if you simply rev the motor? it was a idle and 2500 rpm smog, not a dyno smog. any help would be appreciated.
-Edwin
