Anyone worked with the 16196397 yet?

[RobertISaar]

if you wanted to save an output on the ECM, you could hook up a Schmitt Trigger(or a small microcontroller if you didn't want to go analog) to the IAT circuit. for something that likely wouldn't need the IAC to move around due to increased electrical draw(or maybe it would? I'm not sure how much amperage your pump would require), and probably wouldn't need any other qualifying values, it almost seems a waste.

[Xnke]

Well, right now I can set up the EGR output to trigger on coolant temp, so I figure I can just go to that section of the code, and substitute the IAT variable for the coolant temp variable-but I need to be sure that I *only* catch the EGR functions with that mod. That way, the EGR output trips a relay coil, which then handles the intercooler pump. Basically I'd just have EGR active at idle to redline, but only when temperature is over X value-this would allow me to tweak not only when to run the pump but I could have it specifically not run the pump during periods like idle warmup.

All of that is moot until we can get it to read the 2-bar sensor properly. I still don't have any idea what I'm doing with this, the patch attempt I made bricked an ECM so clearly I did something pretty far off the trail...

[RobertISaar]

does your ALDL setup have indicators on it that light up when comms are happening? I think I'm going to have to throw more mode 8 commands into the initialization scheme and specifically shut up both E and T side before attempting to communicate with either. it's strange, for whatever reason the calibrations I run in the same PCM don't exhibit the same behavior, when I send mode 8 commands to it, it quits talking for the 2 or so second timeout that a mode 8 with nothing after it should cause.

[Xnke]

Yes, I have indicator LED's on both the RX and TX lines. I'm not the only person with this issue with the P66 stuff either, there are at least 2 others on Tunerpro's forums-however when I PM'd one guy about it he was having the issues with P66 and 7165, so maybe he has a different issue-He fixed it by removing and re-installing a slightly older version Tunerpro, however that did not work for me. I think that the ghost-in-the-com-driver error *probably* isn't the issue with this now that Mark's pointed out the multiple replies to the data requests.

I will get more data for you this evening-I'll go out to the shop and play with the connection and try to video the comm lights so you can see what kind of data activity is happening with specific commands (I'll key on, and you can watch the DIC data, then mode 8 command, then mode 1 communication requests, etc)

[Xnke]

Here's a video of the TX/RX LED's, hope this helps. The LED's are superbrites because that's all I had...and they're so bright they mess with the camera. They seem to be pretty well seperated and if you need more info, just ask.

https://youtu.be/qwc5YBlfo6s

[RobertISaar]

finally had a chance to watch this.

most of that, I was expecting, but there should have been a good period of silence after the mode 8 commands.... like the amount of time that it quit communicating after the mode 1 requests, that's what I would expect from a mode 8. the fact that it never quit is odd, to say the least.

I did just have a really dumb thought though. assuming you don't have anything integrated like a 94-95 Grand Prix Driver Information Center, there's really no reason to have the PCM chattering so much... could clear the ALDL message scheduling tables, then it should never attempt to send data until prompted. not the greatest fix, but it may be enough to at least get the boost patch troubleshooting done. I don't have those tables listed in the XDF at the moment, but they're already documented on both E and T side IIRC.

[Xnke]

That would be helpful-I had thought about integrating the trip computer at some point but that isn't really a priority. Antus and Charlay86 on PCM Hacking are taking a stab at it too. They are thinking that the pcm may be taking the 3x input and defaulting the Baro/map stuff due to an error. Also, in Charley's experience the map code mods can't have a jump splitting them up or he had the same problem.

I am collecting all my info and your info and wiring info for these and getting it all to them to see if we can all work together and get this cracked. I dug into the code with my local buddy, and that cylinder count thing LOOKS like it may be all you need to change to 4-cylinder mode!