I have the TunerPro files for the 1228079 ECM, which I think was used for the later 87-88 CCC Camaro and others. I've not yet tried it to see if it will work with the earlier 1226865. Theoretically it should interpret some data correctly, and some data may be junk...

What did you use to invert the signal? Is it in your software? Is that what the FT_Prog is used for? :lol: I used to use a 7407 flip flop chip on my rs232 stuff back in the day of making my own crap. Yes, I just used FT_prog - it was actually fairly straightforward! I'll give a quick summary of the...

Normally sets spark advance to the value in diagnostic advance setting in the ecu. On the holden it locks at 10 degrees upto a certain rpm like 2500 then returns to normal advance both commanded advance and rpm settings are adjustable That's interesting. I am worried that running the engine with th...

Yayy! I've actually managed to make this work! Ok, I revisited this when I planned to tune up my carb, got out my analogue multimeter/dwell meter and found it dead. Replacements are hard to come by/expensive/old so I thought I'd look into reading data from the ALCL and seeing if I can tune the MCS t...

Ah, ok. This almost sounds like progress!

So, ummm, how do I wire in the extra transistor and where do the extra two 10k resistors go? Can I just use another 2N3904?

Thanks!

ND

Do I need another transistor circuit to invert the signal? I thought the 'Q1' transistor (2N3904) in the WinALDL circuit already inverted the signal? I was investigating inverting the signal so I could omit the transistor circuit and reduce the number of variables... I guess what I'm getting down to...

By saying the FT232RL can handle the 160 baud data, do you also mean at 12V? Can you show me what software to use? I've used FT_PROG from the FTDI website, and that identified the chip as an FT232/245BM and that I needed to use older software. I also downloaded MPROG, which is the older software, b...

delcowizzid wrote:http://tunerpro.net/downloadBinDefs.htm

Thanks for the information - I'll have to look into TunerPro more closely as it's all greek to me at the moment!

Just to add to the oscilloscope options too, something like a hantek usb scope is good bang for buck because you can get a nice larger UI on the computer screen, but at a minimum something like this would at least give you eyes on the signals. https://www.ebay.com.au/itm/Soldered-DSO138-2-4-TFT-Dig...

Hi ND. Your circuit as is looks OK (although your soldering doesn't). Don't omit resistors and don't substitute with a zener. And yes, a genuine FT232RL can handle the oddball 160 baud data stream. What you need is the correct FTDI software to configure the chip to invert the RX line. If the softwa...