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It has 12kBytes of internal ROM. 7433 as the MCU type comes from Jeremy Ross. He has told me that the D151801 part number covers a variety of processor architectures. Given his depth of experience, I defer to him on this. Yes, you can access the internal ROM as well as external, that is...

That's pretty interesting. But it is not a 7433 chip, so most of what we know wouldn't apply I suspect. Jeremy Ross would know a lot more since he has worked with the 4AGE ECU. Did you get your 64 SDIP socket yet? That part is hard to find. I just bought a bunch of them since I'm worried...

Grimsta, the ability to evacuate water is massively increased under vacuum due to the lowering of its boiling point. You want the crankcase under vacuum, especially under winter street conditions where water accumulation is an issue. I never said there was no pressure at idle, I said...

That may be true for a track car, but it doesn't hold for a street car that sees considerable time at idle and low rpm and low load. Under those conditions the amount of pressure in the crankcase is low, and ventilation will be inadequate. This will results in a lot of condensate remaining in...

Agree with all of the above. However from a reliability standpoint, a pressure relief valve will last the life of the engine, whereas an oil thermostat will not. So in the end Toyota selected a system that would not require any maintenance since unlike a coolant thermostat, there is no simple...

black iron gas pipe at Home Depot makes a nice extension.

as described here http://www.supramania.com/forums/showthread.php?p=381354

It seems to be universal to these ECUs. What part are you waiting for?

I agree, silicone spray stops the leaks.

Of course. It allows real time access to the entire RAM space of the processor. That means you access the complete engine model. For example, you could grab the raw pulse length from the last speed sensor reading, or the last 4 averaged values, or the running average value, and so on for any...

You got that backwards. The switches are open circuit when the door is closed, and they ground the dome lamp wire when you open the door. I would check those wires very carefully to see if they are pinched or rubbing anywhere near and inside the doors. If the insulation is worn away and the...

What exactly do you mean when you say "grounded them off". What test are you doing. Spell it out in detail. We can go from there.

Do you see it cross-counting when it is idling properly in closed loop after the idle problem goes away? Also, is the sensor heater drawing current?

Another option is to drill a 1/2 inch hole into the trim plastic under the nuts. Then get 1/2 inch plastic plugs and paint them to match the interior trim. Looks pretty much stock if you drill the holes in a straight line.

I suppose the thinking is that the fuel pressure is low during this rough idle, although that is not confirmed by anything I read above. That said I don't understand the following post. The fuel pressure should be constant under steady state conditions like idle. What is all this jumping...

Finally realized I would never install my own covers and paid someone to do it. Had to modify the less than perfect covers from leatherseats.com group buy to get a better fit. Still not as good as the factory original covers though.

The fuse connectors are not made for thousands of connect cycles, and will fail or become unreliable if the fuse is pulled on a daily basis. A better route is just wire a kill switch somewhere in that path. Cheap and pretty effective if done right.

I had my CSI cleaned by RC engineering along with the main injectors. Probably a waste of money living in So Cal!

Okay you also want to study this one. http://cygnusx1.net/Supra/Library/EPC/291410/catalog.aspx?F=2211&P=2 That's it. There are no other stock water lines under the hood. The three hoses for the intake circuit are 22210C and 22210D shown in the link above, and 16267 from my earlier post...

This is what you want... http://cygnusx1.net/Supra/Library/EPC/291410/catalog.aspx?F=1603&P=2 and this one... http://cygnusx1.net/Supra/Library/EPC/291410/catalog.aspx?F=8716&P=1