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Dashpot... that's a joke stemming from another thread where a code 12 was solved by adjusting the dashpot. Well, if it really is 300ohm then you wouldn't push more than 7 mA through that wire during charging which would be a pretty obvious no charge condition. Supposing for a moment, that you...

That is a blanket suggestion. I guess Toyota just likes to add cost to their product for no reason. And your explanation about cold starts indicates you had no clue what its purpose was anyway.

I kind of like the Arduino solution. But I am not sure what you are calling the ECU power feed... +B, IGSW, BAT? Which one?

It has nothing to do with cold starts. Icing occurs when there is humid air, and the pressure drop across the ISC valve causes the water vapor to freeze. Not everyone lives where you live, so blanket suggestions to remove stuff is inviting trouble.

Also great for icing up the ISC valve. Before you start... ask yourself why it is there in the first place.

More pie JJ? If the fuel pump buzzes with the engine stopped it is not working as designed by Toyota. Someone has modified it. EFI fuse can blow if the +B lead is shorted due to worn insulation. Common wear points are the O2 sensor harness and the main engine harness near the EGR.

How about this conclusion, your car failed to start because the ECU was not receiving timing signals from the CPS, hence setting a code 12. Or does the dashpot cause code 12 too! By the way, even with a warm start, the O2 sensor won't cross count for a few seconds, and cold it can take a...

What dashpot? There is no dashpot that is going to result in flooding. Fuel is controlled only by the ECU and the CSI which is driven by the thermo time switch and starter voltage. Neither of these involve a dashpot!

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FA&P=29

Actually. you can adjust them with needle nose pliers by twisting the tab in the top of the shock tube, but you won't know what setting you have without spending some time with the TSRM.

They are compatible with TEMS. Does you car have TEMS?

It is tough for the TCCS to compensate for this with a fuel trim. Dean and I have been discussing this offline, but the latency corrections are only done for battery voltage. Since latency is a y-intercept problem, and fuel trim is a slope correction, fuel trim cannot solve the problem...

Nope. Just disconnect the damn plug and see for yourself. Easier than asking questions here!

Just unplug it. If its caused by the IACV hunting your idle will steady out. Somehow I doubt that's your problem though. (JJ beat me to the punch!)

Yup, that's it in a nutshell but the idle program is actually very complicated with learned values stored for the IACV. Lots of inputs including IDL, NSW, DFG, and AC all playing a role in the target idle speed, not to mention high coolant temp and low oil pressure.

WTF? The ECU controls the IACV based on the programmed target idle speed versus coolant temp and the actual engine rpm measured.

Dean, you will make a buzzer! When you switch on the high beams, 86 goes to gnd and the relay releases, and the cycle repeats! Tie 86 to 12V instead.

Well, no it isn't. There is 3000rpm fuel cut that occurs when code 31 is set (AFM fault). There is also a 3000 rpm fuel cut if the ecu thinks you have been abusing the engine, but I doubt that is the case here.

http://www.supramania.com/forums/showthread.php?41543-Fix-for-dripping-differential&p=571418&highlight=differential+oil+seal#post571418

You need to focus on junction box #2, because assuming your measurements are true, you have power going into the box at connector 2A pin2, and nothing coming out of conn 2F pin 5 (the batt circuit). The only thing in the path is AM2 and EFI fuse. Could also be bad connectors/pins etc, or the...