Blew the head gasket in my '94 GMC Sonoma. The engine is a 2.2 liter four banger. Took the thing down, what a b**** to tear into! Getting the fuel injector set up off took forever. Anyway, got the thing back together with a new head gasket. Got it started, but am not sure I've got the vaccuum lines on right. Tried to follow the diagram, but it was a bit confusing. The Service Engine Soon light is on and stays on. It has plenty of get up and go for a little four, but idles too fast. Any suggestions on how to be sure those vaccuum lines are on right? That's the only thing I can figure may be wrong now.