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"Caution: Previous Owner At Work"

He could indeed. I have to say I've ever seen that happen though. Didn't think there was enough conductance in the path to get that high. Close but no. I know because doing valve unplugged restarts is how I get fast idle for AC and emissions work. Beats trying to jimmy the throttle. Done it many...

The main point of the ISCV is not to keep the idle stable as much as it is to provide different target speeds for various conditions. After all carbs and fixed idle systems of old held speed well enough. If you blocked the path where was the air coming from? On a 7M if the idle path is...

Well, in theory a frozen in place ISCV results in nothing more than a fixed amount of metered bypass air. Assuming everything else is OK the result is a fixed rpm, albeit perhaps not the correct one. It's no different than if it was unplugged. Many here think the ISC system will chase its tail...

How did you verify that? Because, ya know, that shouldn't cause what you're seeing...

You be welcome. Compressor Bypass Valve. Typo on my part...

Scroll down and double click to enlarge: http://www.cygnusx1.net/Supra/TechTips/vacuum_hose.aspx That pic is missing a hose though, the one to the CBV. The hose you're asking about goes to a fitting on the bottom of the inlet accordion behind the AFM. Supplies metered bypass air to idle...

A backfire is an induction system event. Afterfire/muffler explosion involves the exhaust system. Which is it?

13:1 steady state is rich. Should be stoich. Doesn't really jive with an induction leak but I'd fix that first.

Huh. I'm continually amazed why more of these cars don't burn to the ground.

^ Wise words. Fwiw abrasive "cleaning" of contacts, even with correct burnishing tools, generally shortens their life and doesn't last. That said here's a guide for the driver's side that can cause pax window problems: http://tinyurl.com/pvf92dp

That's a clue but not in the way you thought. I'd offer more (insults are tempting) to point you in the right direction but the above should be enough. It's better advice than what you've gotten thus far...

It makes perfect sense. "Power" in the operative word here. You don't have any...

Crack me up. Maybe there is no leak...

Lmao. D'oh! I missed this until now but you're welcome. That setup should result in years of trouble free service. For sure your days of cleaning the suction screen are over. Or Floridians. Oh wait...

Leaks are best found by those who are there to eyeball the car. Nobody here can see it through this little cable. Probably not but you seem the kind of guy who when asked the time replies with instructions on how to build a clock. It's somewhat of a pain to read. Good you got it fixed though...

It's about rate, not an absolute. It's why you can drive around all day with a disconnected TPS and not notice much (other than maybe a funky idle) as long as you go easy with the foot.

^ This. The air bypass screw is accessible only on pre-89 throttle bodies and should be fully seated (closed). The throttle stop screw should be set so the plate is fully closed, the TPS IDL contact set, and the dashpot set...in that order.

Paging IJ....

Asynchronous injection. It's what the stock box does...