Yep, that's it. And I just got in to drive it, and the clutch pedal went all the way to the floor. Is it coincidence or did removing the cap and inspecting the float somehow contribute to it failing? And where is the power steering reservoir? If it's not one thing, it's another, right? The joys of owning an old car.

you have got to be joking. nobody here is going to help you with that BS.

its right next to the headlight fluid reservoir. Directly left of the canooter valve

Sigh... Toaster, the thing you were dicking with was the clutch master cylinder. If you let air in the line it'll compress reducing how far the pedal moves the clutch. You'll need to reassemble the master cylinder and bleed the lines.

The power steering reservoir is up in front of the engine bay, behind the radiator and air cleaner on the passenger side. On the N/A it's mounted on the firewall and is a clear/whitish container with a black plastic lid and on the turbo model it's a goldish, metal container with matching lid mounted by the thermostat tower/neck.

Headlight fluid? Do I need to replace that too? Do they sell that at my local Wal-Mart? Is it expensive? Jeez guys, forgive me for being new to the world of Supra and not as knowledgeable as some of you. The diagram I was following must have been mislabeled and actually for the non-turbo. No need for the sarcasm, friends.

The sarcasm flows like the advice and also the MKIII's woes.... Thick, free and without end.

There is no major difference between either engine which would cause such a mistake. Everything is in the same place, except for the PS reservoir which is mounted 10" left of the GTE's... The location of the clutch and brake reservoir are completely standard.

I'm not sure what book you're using but if it's that bad you may want to give it to someone you don't like. I recommend you buy a hardcopy of the TSRM (it's what we've been linking you to in this thread).

Yeah, all I have is a single grainy, zoomed-in sheet of copy paper, presumably from an owner's manual or shop manual or something like that. Somebody attempted to pencil in the spots that didn't come through clearly, but it's pretty rough to be sure. Thanks for the help all the same. Sounds like I need to get a more comprehensive manual and grow thicker skin. :D

Can't give you a part number for the thicker skin... I think that was a dealer option. Here's an online version of the TSRM (Toyota Service and Repair Manual) for the '91 Supra... most of the mechanical stuff is the same:

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/

Great, thanks! This will definitely come in handy. I should just print the whole thing out and have it spiral bound.

I'd buy a copy for your year in that case. It's a frigging phone book (two if you don't print it all double sided). You can usually find them for a good deal online. People complain about how much they cost new, but I think the TSRM and TEWD (for your specific model and year) are well worth it and quite frankly very cheap. I've got other dealer service manuals which cost 2 to 3 times that amount.