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I don't use it. Those that aren't in a pie eating contest and use it have very positive results.

Clearing codes doesn't mean much with hard faults that are not two trip logic. So go ahead and pull the EFI fuse for 30 seconds.

I wonder if you can cout 3-4, or if it is doing what you say. If you hit fuel cut when you go into boost, 34 is set. Drive without load and go above 3000 rpm. http://www.autoshop101.com/autoshop15.html#OBD1

Confusion with models and manuals.

More off topic. You ought to see the "overseas" Toyota. That is no Japan and North America. Europe except Russia, GCC except Turkey, Turkey.....:nono:

The repair manual says "maybe"? http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=RA&P=7 By the way, this is standard stuff, and is not unique to a Supra.

That would be fine. Toyota sells the repair parts and shows how to put them in the connector with the correct splicing technique.

As a side note, yes it will. You will alter when injection and spark happen. And during cranking (250rpm) that timing has to be in the right place. That is why there is an STA signal. Or one of the reasons.

You don't need a scope to measure Hz. Even a low dollar (relatively) Fluke 115 will accurately show you the airflow meter signal.

That looks like the fuel cooler pump from Navistar found on Ford trucks.

I didn't feel the need to check his math.

In that case, I will cut you a little bit of slack.

Did you even look at the diagram in the link I posted? It is even easier to turn the head lights on. So do that first.

If the pulley is under driven, then yes, the speed of the impeller will slow down. I would be more concerned with volume of coolant making it to the rear.

It develops low pressure behind the radiator, forcing air through it rather than around the nose of the car.

Well, according to Toyota, it won't work. Since the PCM turns on the EFI relay, and not the other way around. http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=47

Don't you have radiator caps to jack up? That would be the best thing you could have said. And they do something else to their car that 7M owners don't usually do. It is not the engine.

A track has nothing to do with a fan shroud. The shroud is used to pull air across the entire radiator core for more cooling. Removing the shroud reduces cooling capacity. The thermostat is not wide open at 190. The temperature rating for any thermostat is when it starts to open. 190 degree...

To answer. Sort of like having a heater grid inside an intake after the intercooler. Constant is the desire.

What is it that you have seen, and where is that you saw it?