EEhack does not connect but TunerPro

[n8sh4de]

Hi guys,
I'm working at the moment at a friends AC Cobra with a '95 LT1 and PCM. The wiring harness is custom from PSI conversion, F-body based. As already said, EEhack won't connect but TunerPro does. Another strange thing I discovered, the data line just goes to pin D30, not pin D29. In the wiring diagrams both pins should be used together for the data stream. I added another pin but with no different result.
I used the same laptop with the same configuration as in my '95 Corvette, so it should have been plug and play.
BTW we used his ALDL cable that doesn't have a 12V supply, my cable has a power supply. I don't use an USB converter, as my laptop has a comport.

Any ideas whats the reason for this? Maybe too high resistance for the ground? Bad cable?

Thanks and best regards,
Max

[steveo]

Another strange thing I discovered, the data line just goes to pin D30, not pin D29.

d30 and ground are the only pins you need for serial data. i don't know what wiring diagram you're reading

i see you use the same laptop but did you go into eehack's settings and change from Y-BODY to F-BODY mode? although once eehack is the bus master they're the same, gaining bus master status is quite different. your ybody uses the ccm as bus master and fbody uses the ecm. eehack needs to know which it's trying to work with.

[n8sh4de]

Thanks for the fast answer! Yes, I changed Y-body to F-body.
This is the wiring diagrams I was using, its from the Y Body '95 Service Manual.15203

[n8sh4de]

We solved the problem! It was the cable. With my cable with 12V power supply it worked instantly!

[steveo]

ah that's good. i need to make a 'cable compatibility' thing for eehack.

my program doesn't actually work directly with the serial interface, i used an intermediate library (QT's cross platform QSerialPort).

i just tell the library 'set the baud rate to this' and 'recieve this' and 'send this'.

if qserialport supports the cable, good. if not, too bad.

i figured this would be best as any buggy serial interfaces would have to be fixed in qserialport to work in eehack, and anyone else who uses qserialport would benefit, which is one of the reasons open source libraries are awesome.. it's allowed eehack to work with macos, linux, and windows without skipping a beat, but definitely possible that other software might include some specific workarounds that i don't.

[n8sh4de]

I don't know what qserialport ist, I use an old Laptop with Windows 7 and Just plugged the cable into its comport (Com1) and IT works fast and reliable.

BTW EEhack is the best software ever! Thanks so much!!!

[steveo]

glad you like it, the code is a bit ugly but it sure does a lot more than i planned when i first started it...