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Car is running very rich (A/F 12.2:1). Clearly not in closed loop fuel control. Could be a bunch of things. I'd start with checking a few easy things like the thermostat and ECU coolant temp sensor. If the thermo is stuck open it will be in cold enrichment. Does your temp gauge read low...

Need other gases to help. O2 CO2, post em up!

I've pulled the data from LordDigital's Techtom ECU. The data is encrypted (as we knew) but the encryption looks like it might be as simple as just scrambling the address lines. More to come on this one shortly.

The main issue we have is that the CPLD I/O expander chip needs more than 100mA of current at startup, which is more than the ECU power supply can handle, causing it to shutdown the entire ECU. We are putting a separate 5V supply on the board so that the ECU power supply is not loaded. Here...

Quite a bit going on behind the scenes here. Jon Sole, a UK MR2 owner has been working with me to move this project along. He has recently demonstrated his 3SGTE ECU working with external ROM using a bunch of technology recently developed: 1) Firmware (VHDL code) has been written for an FPGA...

Comadreha's guide covers just about everything you need to know. http://www.supramania.com/forums/showthread.php?t=84302 and I added a few comments... http://www.supramania.com/forums/showthread.php?t=93250

Remove alternator and run a long extension from the front all the way to the starter.

Then I'd say the CPS is not your source of the problem. You can test it by hooking it up on the scope and spinning it. Should get at least 20V peak to peak at 3000 rpm.

Looks like the pickups were replaced and the CPS rebuilt, or its nearly brand new. Did you get measurements for the gaps? Also, is the top reluctor flush with the top of the G1/G2 pickups?

No one is responding because you can find it easily enough in the TSRM. http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=101

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=119 Also measure the voltage on the Vf pin of the diagnostic connector. The expectation is that it will be 5V per below. Courtesy of ISNMS...

You are running lean, which is obvious from the O2 numbers. Your A/F at 15mph is 15.1:1, and at 25mph its 15.0:1. I would look for an air leak, and also makes sure the Ox sensor is cross counting to spec. I assume the check engine light is not on and there are no stored codes.

Could be, try jumpering pins FP and B+ at the diagnostics box and see if the fuse blows with the pump and FPU relay disconnected. I still think the relay being bad is unlikely, but this could be that one time it is bad.

Yes, that is the fuel pressure up (FPU) relay. The COR plugs into a relay board and looks quite different. When you pull that relay you are breaking the fuel pump circuit. It is unlikely the relay is bad (do the checks I suggested, sorry about the 5 pin mixup, its 4 pins). Most likely the...

5V rail is the VC pin at the ECU (connector S pin1)

Actually, Toyota ECU uses G1 for TDC#6, but the definition is completely arbitrary, it can be used successfully for either. The ECU uses STA to run specific cranking routines in the code. IGSW is used to signal the ECU to commit suicide and turn itself off, as well as kill power to the fuel...

To be clear, we are talking about the fuel pump control relay (L) and not the circuit opening relay as shown in link below. http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=46 If so, its just a simple SPDT relay, so easy to test. I would start by measuring resistance...

If you rotate the pipe flange 180 degrees, does it then fit properly to the housing?

Maybe I'm missing something, but this test is for combustion gases in the coolant. If there is a leak between the oil system and the coolant, this test will always be negative.

You will need to troubleshoot the fuel pump wiring, but at least you are narrowing down the problem. I would start by disconnecting the FPU relay and resistor on the passenger side fender, then retest. If it still shorts then you will need to disconnect the connector to the fuel pump at the...