Just replaced my head in my 1994 22re pickup and put it all back together, timed it and I think I have all the vacuum lines right. It starts and makes a squeal around the egr or in between the throttle body, then runs a little rough. I have to feather the throttle to keep it running. I also adjusted the screw on top of the opening of the throttle body to keep it running, but if I hit the gas it bogs down and wants to die? Any suggestions?