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Did you pull the fuse and look at it? Check for corrosion on the spades? Another place to check is J/B #3...a lot of the connections to the non-working items to the harness are there.

Driver's kick panel fuse block: http://www.cygnusx1.net/supra/Library/TEWD/MK3/manual.aspx?S=Main&P=016 http://www.cygnusx1.net/supra/Library/TEWD/MK3/manual.aspx?S=Main&P=032

Check the gauge fuse in the driver's kick panel. http://www.cygnusx1.net/supra/Library/TEWD/MK3/manual.aspx?S=Main&P=016 http://www.cygnusx1.net/supra/Library/TEWD/MK3/manual.aspx?S=Main&P=032

Too late ;) Since he doesn't have a problem (code 11 is not an issue) and he is convinced myself, JJ, and others are FoS...this thread no longer serves a purpose. Closed before it turns into another pissing contest.

Flow is a different issue...it may not flow as well as later Toyota head designs, but porting, over size valves, and a matched cam will improve it. Moving injector placement to improve air/fuel charge ratio will produce little to no gain...the stock ECU (or an aftermarket EMS) uses injector...

"Only code 11"? ECU power interruption...the one that overrides and masks all other codes? It doesn't have anything to do with your temp gauge problem, but that is one code that I would not be so nonchalant about.

The machine shop needs to check 2 things: - Hardness - Is the head annealed (i.e. soft)...if it is, sell it for scrap. - Straightness - Is it turned into a banana. Depending on how bad will tell if it can be decked and can the journals/caps be line bored.

Doesn't "mix" well? The same head (with mods) that has produced over 1000 HP and has no problem making 500 HP? What makes you think this is "poor porformance"? I think your buddy is FoS.

Oil Pressure: http://www.cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?Section=LU&P=4 Compressor surge? Sounds like your BOV is not operating correctly.

As it was from the beginning ;)

Considering a code 11 overrides (masks) all other codes and can easily shut the entire EFI system down, looks like your problem isn't solved after all ;) It's funny how karma works sometimes.

I would check the CPS wiring and connector...next time it does this, wiggle the CPS wires where they lead into the CPS. Someone cranking at the same time makes it easier. BTW - A code 51 will NEVER cause a no start or cause the engine to die.

Open differentials are not very picky like Ian said. A 75W-90, 80W-90 or straight 90W like the Castrol you mentioned will do fine. Even if they do contain friction modifiers it doesn't really matter since there are no syncro's like you have in a manual tranny.

Depends on what oil you're calling a "synthetic". A PAO or ester based oil will go 8,000 miles easy with a filter change at 4K. Like I said above, over that I would do analysis to make sure it's still up to the task.

That's a minimum rate...pretty sure it flows more than that. Here's a FP upgrade guide on MKIV.com: http://www.mkiv.com/techarticles/fuel_pumps_test_2/index.html It should answer all your questions ;)

Yep IJ nailed it...the kind of crap that got started again is exactly why I locked the 1st thread. It is also why I referred to SF...the BS in that thread is std ops over there. It's also the BS that is not tolerated here. No you should not have...but, it is good you apologized. Enough has...

Same here...I have had good luck with the Stant SuperStats. Regardless of brand, I test them in a pot of boiling water now to make sure they open. Cut the jiggle valve off too (after they test good).

Not handy, but it's in-line on the channel forward of the stock sensor port on the front edge of the block, just aft of the rear timing cover. It has a bolt type plug in it from the factory.

So can the guys on SF (the "true experts")...give them a try: http://www.supraforums.com/forum/index.php? Because this thread is done here.

Ester is more shear stable than PAO. Well, iirc it was right at TSRM max spec...you'll need to ask IJ. I do know he used a brand new block...plus, his oil system is heavily modified. Way more than most. Does that sound like 10 psi per 1000 RPM? Sounds like he's pulling it out of...