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mpgx2 · 06-21-2010, 08:23 PM

Rather than trying to hack the ECU I suggest that it
might be easier to piggyback it.

If you have an mpguino installed, then you'll already
be reading the injector pulse lengths.

It's my pet theory that if you can read the injector
pulse widths then you can make a daughter board
to intercept them, and then reduce to time of the
injector pulses, thus leaning the motor.

One needs some special circuitry.

But if an injector pulse is 10 milliseconds and you
want to lean by 20%, output a signal of 8 milliseconds
to the injector.

The ECU will never know..

I'm told by my mechanic that LPG gas totally cut
the injector signals entirely leaving the motor to
continue running.

Anyway, I am myself working through the issues.

06-21-2010, 08:23 PM	#34 (permalink)
mpgx2 EcoModding Lurker Join Date: May 2010 Location: Sydney Australia Posts: 54 Thanks: 0 Thanked 2 Times in 2 Posts	hacking the ECU or piggybacking it.. Rather than trying to hack the ECU I suggest that it might be easier to piggyback it. If you have an mpguino installed, then you'll already be reading the injector pulse lengths. It's my pet theory that if you can read the injector pulse widths then you can make a daughter board to intercept them, and then reduce to time of the injector pulses, thus leaning the motor. One needs some special circuitry. But if an injector pulse is 10 milliseconds and you want to lean by 20%, output a signal of 8 milliseconds to the injector. The ECU will never know.. I'm told by my mechanic that LPG gas totally cut the injector signals entirely leaving the motor to continue running. Anyway, I am myself working through the issues.