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Hacking up Honda's ECU
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PostPosted: Tue Jun 14, 2011 1:34 am 
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Joined: Thu Apr 21, 2011 2:53 pm
Posts: 20
I'm so glad this is actually working now. I never expected to see so many functions in OBD0. Here in PR OBD0 has been actually forgotten. Everyone just talks about chrome and P28's. If you have a civic, or a crx and it's still OBD0, they just say u have a POS. lol. When ppl actually see all the stuff and functions my PM6 has they just don't believe its really a OBD0. And now with the CEL functions ppl are even more impressed. Many thanks to fastcrxsi90 for so many breakthroughs on OBD0.

Now just some future development ideas I had in mind:

With so many cops around I'm actually running a OEM silencer with resonator on my daily drive CRX so it sounds completely stock (honda = cop magnet). With being turbo this is not the ideal exhaust setup you need for performance. So to fix this I installed an electronic exhaust cut-out that opens up with a flip switch in my dash so I can get best exhaust flow when going on boost maps. I also drive my water/meth injection pump from this same switch. I was thinking... Would it be possible to add a feature that could actually activate a (-) signal (just like the vtec activation with the A/C relay) when it hits boost map? Just like the boost CEL indicator but in this case an output that could drive a relay to open up the exhaust cutout and my water/meth? Not so many outputs available on a PM6 tho...

If the program had an extra feature for this kind stuff I could just have a "master arm" switch for the relay (+) input that runs the water/meth and exhaust cutout, and the ECU would activate the relay coil when it hits boost map. This feature could also use "X" RPM to activate. Just so many possibilities, but at the moment this is what I can think of. Just putting some ideas up :D

Thanks!


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PostPosted: Tue Jun 14, 2011 12:57 pm 
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Joined: Wed Jul 28, 2010 5:23 pm
Posts: 52
If you are getting the CEL to light up under boost, then you already have the right signal...find the appropriate wire in your harness and tap into that signal with your relay, etc and you should be ale to make it work without a problem.

Kirk


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PostPosted: Tue Jun 14, 2011 5:04 pm 
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Joined: Thu Apr 21, 2011 2:53 pm
Posts: 20
gtpilot wrote:
If you are getting the CEL to light up under boost, then you already have the right signal...find the appropriate wire in your harness and tap into that signal with your relay, etc and you should be ale to make it work without a problem.

Kirk


That's not a bad idea at all. Tnx! But it would still be a nice to add a "activate under boost" option to the vtec activation function. So u could choose between activate @ X RPM or "under boost".


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