Up until last month my car ran perfectly, it idled at 750 and never stumbled. However, out of nowhere it started to stumble and then stall whenever it idles (hot or cold). I've thrown everything I can think of at it and nothing has worked. Does anyone have any sugestions?

Here's a list of the things I've done:
  • New gaskets/o-rings on top end of engine
  • Readjusted the valves
  • Adjusted the timing
  • Checked the spark plugs
  • Checked the dwell swing
  • Checked compression (115psi cold on everyone)
  • Checked voltage to idle motor (11v)
  • Checked idle ecu and motor by removing the plug closest to the center of the car and having the idle spike to 2200
  • Checked battery voltage at idle (13.5

to 14.5)

This is what happens when the car idles:
https://drive.google.com/file/d/0B2N...w?usp=drivesdk

Don't know if its related but is this amount of smoke coming out of the oil filler normal?
https://drive.google.com/file/d/0B2N...w?usp=drivesdk