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Yeah, there's some 0603 chips on there to test your eyesight. Also a TQFP64!

I'm confused, you have a code 34, and you think its due to the CPS! :aigo: I can see why JJ gave up on this one.

Boards came in today. Parts should be along in a few more days. Not sure how long its going to take to get this altogether, but hoping it goes smoothly.

Thanks for the support, but the only thing I'm short of is time these days. The new boards are due to arrive this Wednesday, so we will get to work on building up some prototypes and see how it works!

Damn, Gary's keeping me honest. I forgot about 41, fair point, and the WOT open-loop trigger will impact mixture, but driveability will still be good. I doubt he has a 4-gas analyzer! :icon_bigg Anyway, back on topic he doesn't have a code 41, so its moot. 51 needs to be fixed first, so...

Quark, you are not getting a good AFM signal at low flow. Since your intake is stock, its not a laminar flow issue. Best bet is to look at Kv with a frequency counter DVM, or better a scope to look for inconsistent pulses. With the lex AFM, the flow rate is below the designed value at idle with...

Like I said, its not used for anything but transient fuel calcs. The ECU does not check that the TPS signal is valid, and resetting it will not make any difference. There are no error codes for the TPS except for the IDL signal, which is the only signal from the TPS that will actually make a...

When you say nothing, do you mean it is open to the atmosphere without a filter or stock air box?. May be you can post a picture.

AKA no such thing. I have disassembled the ECU code. Your car computes fuel primarily from the AFM and RPM. Everything else is a correction. TPS is used only for transient throttle events. Don't believe me, disconnect the VTA signal wire and go for a drive. You will not run rich, you won't...

If you don't know don't post. The flow of air into the KV AFM must be laminar, hence the egg crate in front of it, but if there is an aftermarket filter bolted to it and buffeting from external sources (such as from a missing fan shroud) the flow can be beyond straightening with the egg crate...

Oh really?

TPS won't cause car to run rich. A hint: code 51 is usually caused by a maladjusted TPS, and that signal tells the ECU to go into idle mode. Your car shows poor idling characteristics, maybe there's a link, do you think? Don't waste your time replacing it, when all it probably needs is an...

What's in front of teh AFM? If you have any disturbance from an unshrouded fan or other air flow and the AFM input is not well shielded from it then you will see problems. Hook up a DVM, or better a scope, to the Kv signal and see how stable the pulses are at idle.

I have just begun to dig into the GTE code. It will be a while before I can answer your question. AS far as THW goes, its treated exactly the same as THA, there is a 10 bit ADC that converts the sensor voltage to a digital number. It checks if input range is valid (76 mv < THW < 4.73V). If out...

A short update. Despite the lack of posting activity, we have been working hard on the next step of this project. Attached is an image of the next gen board. This will support USB diagnostics, up to four ROM images stored in flash memory that can be switched in as desired, and also real time...

To clarify one thing with the Vf line. It is actually just connected to a PIO on the microprocessor, so it can only be 0 V or 5V. The way it get the "in-between" voltages is to modulate the number of 0V and 5V intervals, and then uses a low-pass filter RC filter to smooth out the signal. The...

JJ, you no longer live down here too?

Down where JJ? Yeah, some of those plates are over the top, but they have an 8x8 for *only* $166.83! :icon_razz

MSC sells lots of diamond paste. Forget the carbide pastes, unless you like to work more for no purpose. You can buy a nice lapping plate from Mcmaster Carr. None of this is cheap though, so make sure you've thought through why you need to do this.

Mode 2 is used when running with external ROM. From the factory they run mode 7 to use internal ROM. You're interrupt table looks a little weird to me. Using your nomenclature, I would not expect IRQs 01-06 to point to the same address. What is this code from?