first flapper you see is the traction control butterfly, its always open. 2nd is the one your after. The IAC motor under your yellow hose (mine broke there too! ) is a stepper motor that runs on 2 skateboard type sealed bearings. Somehow they get corroded and get very stiff and even seize up at a 1800 RPM like mine did. I just drove it home 10 miles in the freeway without my foot even on the gas. Took the stepper motor apart and found the rear bearing was totally seized. Lubed both and got them rolling again, IAC worked great after that: started at abou 1000 cold and dropped to 600 like clockwork.
From what I've read, there are several issues here. First, this is a Karman vortex MAF sensor, it is very sensitive and delicate. Spraying with MAF Cleaner requires CAREFUL cleaning and FULLY drying it, since there are several places for the cleaner to accumulate inside the sensor. Allow 24 hours to dry. Second, poor idling can be due to failed electrolytic capacitors in the ECU, if they haven't been replaced, you should do that. Use only Panasonic or Rubycon GENUINE Low ESR type capacitors, I bought mine from Mouser Electronics. The replacement process is DELICATE, so don't just use any soldering setup, skill is required. Third is to clean the throttle body, which controls idle fuel and air mixture.
Thanks for watching I replaced most of the major components including replace all the capacitors In the ECU. I purchase from Digit Key but still did not solve the problem finally I found out that a wire bundle under neat the fuse box came loose.
vortex generator MAF sensors cannot be cleaned. They measure the air flow patterns off the back of the triangle airfoil and should NOT be sorayed with anything.
From NAPA: "Warning: Do NOT use any MAF sensor cleaners on Karman-Vortex style air flow sensors, which are typically found in Toyota Supra turbos, Mitsubishi (including the DSM rebadged Eagle Talon and Plymouth Laser), and most Lexus engines. These special Karman-Vortex sensors use highly sensitive components that cannot be cleaned and any attempt to do so may cause serious damage to the MAF sensor. There is no reliable method for a DIYer to clean a Karman-Vortex style air flow sensor and any attempt to do so will render it useless. When in doubt, just leave it alone."
