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Ho boy. Check codes and then get back to us....

1) Actually a "regular" voltmeter (I assume you're referring to the D'Arsonval movement/galvanometer type) would be bad because the input impedance is typically too low. 2) While measuring the sensor at 2000 rpm snap the throttle wide open then closed. Sensor should go full rich (800 mv or...

You're barking up the wrong tree. First, heater resistance is dependent on temperature. Second, the heater is mostly irrelevant to O2 sensor operation once the engine is hot. What you should be checking is sensor voltage and not the heater. And while it's possible a bad sensor can cause 25 a...

But, but...he was told there is ;) OP: Even if it were true you'd be surprised how much hot oil can flow through small passages. After leaving the filter all the oil going to my engine goes through the equivalent of a 1/4" hole. Been that way for years...

No, it isn't. There's very little pressure drop across the air filter and AFM. Nor do you want any. Think about it...

As Jdub said it means "idle". The IDL contact is a switch in the TPS that tells the ECU when the throttle plate is closed. It's what's making your engine rev up and down but it's not the cause of your problem. When the idle speed valve is working idle problems are caused by the switch being...

You be welcome. Assuming you're still around you can spring for a Squirrel burger next time I visit the old homestead ;)

http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=48 If your harness colors don't match that schematic separate them and turn the key on. Find the two that have 12 volts and connect them to the two same color (usually black) wires on the sensor. Doesn't matter where each one...

It's supposed to do that. Why I asked before. Those symptoms prove: 1) The IDL contact is closed. 2) The ISCV stepped open on shutdown. 3) The idle speed path is unrestricted.

What Jdub said. Know what hydraulic hammer is? Like when the pipes in an old house bang when a faucet is suddenly shut off? That's what happens in the fuel system each time an injector snaps closed. The fuel rail (as a reservoir) and pulsation damper act to smooth those spikes out. Tightening...

Well, technically speaking it does do something but nothing that will effect how the engine runs. It's used to adjust the pressure response of the damper. To set it correctly requires a fast acting pressure sensor but you won't notice anything no matter where it is. I've seen more than a couple...

Lol @ Jdub.... Idle should be around 1800-2000 when cold and the valve full open until mixture becomes leaner. It's a quick way to see if the idle path is restricted although it seems you've already done that. Frankly I think your problem lies elsewhere. I don't wait for cold btw. I dummy the...

How do you know it's full of refrigerant? What is static system pressure? What refrigerant is being used?

The illusive and rarely photographed oil drinking Black Forest spotted stone penguin. I thought they were a myth ;) I concur. Gold GC can have a greenish tint under certain lighting. Nothing to worry about...

OK. It has to be cold though. Maybe not overnight Norway cold (although that's OK too) but cold...

That's nice. How about answering the question?

Your radiator appears isolated. The real question how many mv are there between battery negative and the coolant itself. Take off the cap and stick the probe in the coolant. Don't let it touch the radiator....

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=EM&P=21 I'd leave it alone...

What is the idle if you unplug the ISCV before doing a cold start?

That film is good example of a bad mechanic. Lmao @ "bimetallic" spring clamps. I wish there was such a thing. Lots of potential for fun there ;)