[Rupesy]

I finally got my fuel tester from JC Whitney and did a few tests. I found that my fuel pressure was 75 psi, pressure decay test checked out fine. Outside temp was around 65F and tech spec book says control pressure should be 23 psi and mine read 30 psi. Tapped the post for the bimetallic switch in the WUR down about 0.15mm and it dropped control pressure it down to about 25 psi. (This made a noticeable improvement on warmup) I watched it rise over the next minute or two to 52 psi where it leveled out. According to the tech spec this is where it should be. I pulled my spark plug and it was white which usually means you are running too lean. I noticed it has been running a little lean over the past week or so. You may remember when I bought the car I posted a pic and it was encrusted with solid deposits. So step in the right direction anyway. I have been trying to set the mixture screw and idle screw to get somewhere in the neighborhood of 900 rpm. When I set the mixture screw lean, I can fine tune the idle down to 900 no problem, but then I run lean and thats no fun. If I richen the mixture up, it seems like it performs really well, but I can't set the idle below 1100 rpm. If I try to go below that, the engine goes into that oscillation cycle. Any tips or more tests to do? Whay does it oscillate like that?