Search results

Don't worry, I've been waiting for Henri to wrap-up the I/O analysis before posting the GTE code. We've had it dumped for a long time, but without the I/O mapping it is impossible to make any progress. There are still about 10 pins that need to be verified before it is complete.

The GE ECU I/O has been completely documented by Henri (Brutus). He developed a simulator to trace signal paths in the ECU since it is very hard to do it by inspection of the traces since many of the ICs are undocumented Denso parts. That work has been folded into the disassembly files that you...

The chip part numbers are different. The code revision number is actually printed on the processor as well. It is the second line, usually something like 7433-xxxx on the 7M where xxxx is software id, which can also be found in the code just before the vector table. The 7MGE code has both...

Do you see the timing mark in two places for every plug wire connected to the timing light?

I read that he swapped the old plugs back with no improvement. When you see the timing light in two places, could you describe this in more detail. Also, what plug wire is your light connected to (most people use 6 since its easier to get to? Do you see the same timing issue with the sister...

The supermonitor does two simple things to read the codes. First it grounds TE which causes the ECU to go into diagnostic mode and flash the 'check engine light'. Second, it counts the pulses on the CEL and converts them to the diagnostic number. The ECU can output the diagnostic data you...

I forgot to mention... In'N'Out! :icon_bigg

All the naysayers don't seem to live here. Best weather in the country is SoCal. You want high humidity and hurricanes, move to Florida or Gulf Coast. Want your car to turn to rust, try those places again, or midwest or east coast. Why is it expensive to live in California.... because people...

Its complicated, there are many inputs to the ignition timing equation including a knock sensor. At a very basic level, the MAF is used to compute engine load, actually volumetric efficiency is what it calculates, but that is called the "load". The Lexus/550 mod (or piggyback/550) makes the...

He means pressure. http://www.aircraftspruce.com/catalog/lgpages/homebuilderBrakeBleeder.php

Why can't you calibrate the TPS? I mean all you do is turn it until the IDL switch closes?

Whoohoo! Thank JJ, for explaining the workings of the mysterious pulsing pressure sender.

Nope, nothing for sale right now. We are debugging the hardware and getting the basic software in place. The GUI is being written for now by Jon Sole using Qt. It will most likely be open source with a GPL license, in which case the community can participate. By the way, we have looked at the...

It means your paper clip isn't making a good connection to TE1 and E1.

It's hard to find published data on BSFC versus coolant temp. The effects do not seem to be very large. Here is a plot of BSFC for three different coolant temps for a turbo Wankel. The paper is SAE 820354 from NASA Lewis.

Ian, its a mess, each sensor will be scaled some upwards some downwards. To raise the rev limit you would need to increase the clock frequency, that makes the number of clock ticks between each NE pulse increase and so the ECU thinks the crank is spinning slower. With a faster clock, the...

I just checked and at least for the pre89 7M-GE the rev limit is 6800rpm. At that rpm fuel is cut, ignition continues to work normally. In practice, that keeps the rpm below about 7000rpm.

The ECU computes RPM by averaging the time between the last 4 NE signals from the CPS. Since the NE signals must be synched to crank position for the ignition to work properly, there is no way to fudge the signal like you do with a piggyback and the AFM. With the stock 12MHz crystal the...

Yup, Volvo's come from the factory with worm clamps. 10 years on the wife's V70 and no leaks yet.

Sorry, I meant 31. In any case, code 31 is not coming from the CPS. A bad CPS will give a code 12 or 13. A blocked turbo seems unlikely, especially if it spins which is a test I would assume you have already done. I would check for an open in E2 (the sensor ground) or short circuit between Vc...