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You gotta like the Saab cup holder http://www.youtube.com/watch?v=xasj1SbCiTA

Technosquare sells the Techtom line. The CPLD in that board is no easy thing to duplicate. With the Denso MCU in external mode you lose ports A and B, and need to emulate them in external logic. That is what the CPLD chip does, and it requires some fairly intricate VHDL code to do it. The...

ap: For the reader board that Kashi designed, the EEPROM address 0000h maps to 8000h in the processor address space. Thus, the top of the EEPROM address 7FFFh maps to the processor FFFFh, and is where you would place the interrupt vectors. By the way, the knock processor uses the same...

If there is any oil leakage from the crank seal it would be a good idea to remove the pulley and replace the seal. Same goes for the oil pump shaft.

A point of confusion is that the rad caps changed around 89, and if you have replaced the radiator with an aftermarket you really don't know which cap you need. The aftermarket I bought used the early style cap, so my 90 Toyota cap no longer sealed when I put it on. If you buy an aftermarket...

Thanks. So many errors in the factory books. Of course, when I write stuff like this its full of errors too.

As an aside, the NE signal triggers an interrupt in the ECU that sets the fuel and ignition events in the future by loading 4 timers, 3 for the injectors and one for IGt. G1 and G2 sync a variable that tracks the crank angle in 30 degree steps. It would seem that only one of G1 and G2 is...

I've had reason recently to figure out which coil is G1 and G2. Based on the TEWD and some photos I have of my own CPS, I believe the table below to be correct, which is then leads me to identify G1 and G2 opposite from what's in the TSRM page ISMS posted above. Can anyone confirm that G1 as...

It's really easy, just think of where the energy is going. When the spring is compressed it stores potential energy (1/2kx^2), and when it extends it gives it all back minus frictional losses. If the frictional losses are the same, then stiffer springs will take no more average effort to turn...

The ECU code supports additional ADC channels that we believe are associated with California requirements (the channels are not connected in the non-california ECU). There would also need to be hardware changes in the ECU board to support the EGR gas temp, OX2, and O2 heater current. I have not...

In the 7MGE ECU, the SINx inputs are pulled up by an 8kohm resistor array to Vcc, thereby defaulting to a logic 1. You can pull down an input by adding a 100 ohm resistor to ground in the spaces provided (R613). Confirm that R614 is ~8kohm, then use a 100ohm in R613 to pull it down. No need...

Henri (Brutus) has been a key player in the debug process so far. He has worked hard to reverse engineer all the IC functions on the 7MGE board and map them to the control pins of the MCU chip. If anyone can help him out with a 7MGTE ECU, that would benefit us all. Kai, its an interesting...

My long term vision for the end of this work would be a daughterboard that supports moving the code into RAM, and therefore supports real time tuning of key ECU parameters through an attached laptop. Whether it would ever make sense to sell such a product is not clear. I think the Mines...

Exactly. Wherever there is a sudden pressure drop, such as across the ISC and the throttle, you will get localized cooling (venturi-flow cooling). The only requirement for icing is high humidity.

It comes out of the head and through the lower runner. Maybe these pix will help?

There is one remaining unused resistor position but it is ignored in the code. It seems the TurboA must use a different ECU.

The resistor just pulls a particular input to logic low (JDM=0, NA=1). The ECU code checks this particular bit at numerous places and runs different code. It completely skips the EGR subroutine if set to JDM. The MCU includes all maps for A/T, M/T, JDM, NA. Given that the ECU code is set...

mkiii222, I'm not sure what the question above is asking. Both the data logging via USB and external memory operation will require daughterboards. For datalogging the USB-serial converter chip is relatively small, and so the board can be very small, most likely attached directly to the USB...

Fans of going EGRless might be interested in this... http://www.supramania.com/forums/showpost.php?p=1317537&postcount=125

Could also be a platinum electrode that fell off of the sparkplug. I've seen it happen once. It also put a bunch of tiny dents in the head.