Originally Posted by garymand

JNT, making progress, you got 600 idle and I passed smog and we've both learned a lot and still don't know what's right. "lengthening your rod" is a real trick, but I know exactly what you mean. Its agood way to get home but not right. DC voltage is right and a digital meter is not very usefull, a needle is helpful.
I found 2500 a good place to do the mix, get it to 50%. then check at idle. Just the opposite of the manual. This way I end up with closer to 50 at idle.
Also the vacuum is critical on mine: I found very poor results with vacuum on. The line to my EZL had no color stripes and vac all the time. The one to the purge valve has purple and black stripes and no vacuum at idle. I switched them and life is much easier. It passed smog with a 750 idle and 5* timing. I told the teck what I did and he said it must be right. I really don't think so. But the car passes.

You can check your system (and voltage readings) with X92, ign on but do not start engine. Led is on, voltage at pin 3 X11 is 70% 3.84 volts DC meaning USA non CAL, Fed, 85% is CALifornia. Open the throttle full, 20% says good full load switch, depress air flow plate: 10% is good idle switch. Important is the relativity of where these %'s are on your meter. The formula for volts is dc reading/pin 4 voltage (battery)~12.8. ie., 3.84/12.8=.30, 1-.30= .30x100=70% Fed controller. The voltage is higher with eng running maybe 6.4/13.8 would give you 50%