Okay, so I checked for vacuum leaks using slow burning incense sticks (lots of smoke, should be able to tell where it goes... tests areas behind firewall as well as in engine bay, nothing appears to be leaking...
Tested the O2 sensor, it appears to be giving quick updates within specified range...
After testing for vacuum leaks and making sure the O2 sensor was okay, I started to adjust the 3mm hex screw at the mixture tower again.
DMM in duty cycle mode (%) probed at 2 and 3.
Key in, reading is 69.2%
Start car, Park engaged, reading holding at 49.3%
After a short while, percentage starts to creep up. I stop the engine when it hits near 70%, I turn the hex screw CW 1/4 turn and then restart...
I do this for about 4 iterations, but it gets to the point where the percentage still rises, engine appears to be running worse than when I started... on my fifth one, car barely starts runs pretty rough, yet percentage rises again from about 50%, working its way to 70%ish before I turn it off...
On the 6th iteration, CW again 1/4, but the engine no longer starts...
I then turn the hex screw 1 full 360 degree turn CCW. Engine starts, but again percentage keeps rising at idle in P...
The problem...
If I turn the hex screw CCW, the percentage keeps creeping up until it gets to the point of no start...
If I turn the hex screw CW, the percentage keeps creeping up until it gets to the point of no start...
This is all at idle, in park, no input to the throttle... I would think that one direction would give me a number that increments to 0% and another that increments to 100%....
Any ideas?
