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There shouldn't be any voltage there, well maybe 0.005v. It sends a signal to the fuel pump ECU to halve the voltage to the fuel pump at idle. I don't bother with the fuel pump control, it's just something else to go wrong. I wire the fuel pump using a 5 pin relay. 30--- FUEL PUMP 86---OIL...

This info would have been handy at the start of the thread.:confused:

I had exactly the same problem with my starter, turn the key and just got a whizzing sound and no engagement of the ring gear. The previous time I tried to start the engine, no problems. Plunger contacts kit here...

Most likely the starter contacts need replacing. Yes, FC is ground for fuel pump relay.

The way the car suddenly lost power, I would be looking for severed wires first. particularly any wires near the drive belt/pullies.

Correct, M-rel pin is a 12v output. White/black wires are always earths.

Sorry, I was quoting Bimbo's post #10. M-Rel switches on the EFI relay. Have you seen these diagrams? http://www.lextreme.com/PDF/scecu1.pdf http://www.lextreme.com/PDF/scecu2.pdf

Thats the way I always wire them. I've done 10 now with no issues. I use relays for the fuel pump, starter circuit and main power distribution.

Ah that must be the problem then, my laptop has Chinese speakers.

Must be my speakers, 'cos it just sounds like someone banging on a steel drinks tray that has a handful of nuts and bolts on it to me!:confused:

Awesome!:eek: So what did you have to do in the end, I've lost track now.:rolleyes:

After market guages should come with their own senders, fit them and use the stock wiring. After market gauges will work with the stock senders, but probably won't be very accurate.

Fuel pressure is about right.

To save me time, have a read here......:D http://oldschool.co.nz/2011/forum/index.php?showtopic=30736

Flex plates are the same as are the bellhousings. (IIRC) You just need a pre-VVTi auto 'box to bolt the T/case on to and a seperate controller e.g. http://www.spitronics.co.za/cms/gearboxmanagement.p

Yeah, from '93 to '97 the ECU plugs/sockets are like the one in the diagram in my post above. The VVTi ECUs are different again.

That pretty much covers everything. There's an ECU pin-out diagram here if you need that too..... http://s007.radikal.ru/i300/1011/27/9aa14b22fd1d.jpg

This help? http://www.ls400.ru/lexus-89-2000/

Yup, me too!

Possibly. It would be ideal to have a good clear photo of your engine, mainly from the passenger side.