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I be curious why you guys think this matters. Can some explain the benefits? Monsewer?

^ This. And why would you be measuring resistance with power applied (ignition on)? To check the integrity of the wiring unplug it at both ends and check for low resistance (continuity) on each wire. To make the test faster and avoid having to lengthen one meter lead short a pair together at one...

You should be doing the opposite...

Well, how could it work if it didn't?

Looks to be the EVAP line rerouted to the wrong side. Missing canister, etc...

Exactly what it's supposed to do when the afm signal is bad. Nicely done...

That makes no sense in a couple of ways...

I see you're in the Great White North. Note the differences in that wiring for Canuck cars vrs US.

Says it's for an '89: http://www.cygnusx1.net/Supra/Library/TEWD/MK3/ Course, that may make it all the worse in some cases. OP: See here and the following page: http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=4

Which notations? The legend for everything is in the TEWD.

1) Resolution and accuracy are different things. 2) In some applications trend information is superior to absolute value.

http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=038 http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=100

No. With a fixed amount of bypass air the engine should run at a constant rpm. It's no different than if you held the throttle open a fixed amount.

My comments were based on the above. If you intend to leave the NB nothing on the WB needs to be connected to anything other than the gage.

Yes. If you remove the NB sensor you'll need to connect the WB's emulated NB output to that pin in order for the system to perform closed loop fuel control. Do not connect the WB's A/F ratio output to it.

Or here: http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=50 Edit: Thanks Nick. I never bookmarked the site as it used to come up as the first hit on Google under "TSRM". Dunno why but it doesn't seem to show at all anymore. Either that or my Google Fu is slipping...

Actually it does. Everything you need to know is in both the TSRM and TWED.

Good reason to own the book although that info is online. I dunno what happened to Cygnus but there's this manual compliments of our head honcho: http://tinyurl.com/ly9ax98 Pin out is under the EFI section...

The prosecution rests...

First, these motors are only "finicky" when the people who try to repair or mod them have limited EFI knowledge in general and of this car in particular. It's a very simple system compared to OBD-II. Second, if you're looking for advice here you'd better be able to sift through the crap...