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Check your codes? Nah, makes too much sense...

He is. Excessive high side pressure also energizes the fans via the high pressure switch. I don't remember which temp switch is which. You could pull one out and test it or pull off the neck to test. The other thing is to ohm out each switch to pin 11 at connector B1...

The WB is probably slightly off. Not the best instrument to use for checking stoich. Either that or the engine really is a bit lean. What is the average voltage of the NB taken at Ox or Vf over a few minutes at a steady 2500? Unless it's 450mv or 2.5 vdc the engine is not at stoich even though...

As long as it's not into lean misfire leaner than stoich at idle isn't a bad thing.

Right. In a pressurized fully closed type system the radiator is always kept 100% filled by the reservoir. Therefore the tank is an extension of the coolant level. As long as everything is working there's simply no need for removing the cap. The less it's messed with the better.

If it was simple you wouldn't have spent so much time trying to figure it out and this thread wouldn't exist. And I said you *risk* measuring circuit resistance by not disconnecting. Point is it's very bad technique yet you keep telling us what a sierra hotel mechanic you are. I r corn-fuzed...

Or use the cap like it was designed to be used. It has two positions for a reason. Then again:

You be welcome. Note both switches are on the radiator side of the thermostat. On my car both activated the fans. You can simply pull off the connector and ground each (key on) to see what happens on yours. I say that because over model years there was some goofiness about how that AC fan stuff...

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=AC&P=33 Can also be used for an in cabin temp alarm.

Not supposed to be taking the cap off.

Physics is a harsh mistress...

It's my understanding the SAFC only displays VTA but having never messed with one I could be wrong. Since IDL is pulled up internal to the ECU it will be high when the TPS switch is open (throttle off idle, input floating) and low when the switch is closed (throttle on idle, input grounded)...

It's ok. Probably a touch of hypoxia. Check the O2 flow to that mask :icon_razz If you're not using it this is a good page for codes: http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx

No, 51. 41 is related to the VTA signal

Had you done it using the diag system like Nick is suggesting all you would have needed to do is loosen the TPS. No moving of hoses or disconnecting of anything. Even more important is you wouldn't have made the pin mistake because no measuring would have been involved. Nor would the TSRM have...

TF: That's a dashpot. As 89jdm said it slows throttle closing. The little check valve-like thingy connected to it makes air flow out slower than it flows in. It's an emissions device. By slowing throttle closure a little air sneaks past the throttle plate to completely burn fuel that's already...

Meh, I really don't care what his kind thinks. The bottom line is we're flush, he's not, and his anger about it is misdirected towards those not responsible instead of himself.

I'm unsure what you're talking about. If the throttle stop it's not there to control idle even though it effects it. If the factory air bypass screw on early model throttle bodies it's there to set the valve's pintle within the window of position needed for the full range of control. Does that...

^ Been a while since I looked but I think these days Cali issues two different licenses for bikes. Not sure how that'll effect people who take the test on a smallish one. May not matter though, I'm too lazy to look it up. One thing I do like is they have handicapped plates for motorcycles. I...

I don't know how many times I've said that too Nick but many here make setting the TPS way more complicated than it needs to be.