Knock sensing and retarding ignition

[Joseph Obernberger]

Hi,
    I too have tried the LM1815 without much success - let me know what you find
out!
:-)
What sort of ignition does this engine use?  On my car (1991 MR2 Turbo) and on
various other japanese cars (RX7 for example), the ignitor just takes a nice 5
volt pulse to fire the coil.  The pulse width is the charge time, and the
ignitor fires on the down transition of the pulse.
On the MR2 the ECU gets two signals from the distributor (hall) and outputs a
signal (5 volt pulse) to the ignitor.
Not sure if that helps any...
                                                joeo


Stephen Webb wrote:

> *I have experience with pics, and I was able to interface with the MAP
> sensor too, but I have had trouble getting the LM1815 to work with my
> distributor.  I believe I may be playing with a bum distributor.  I should
> have another one in a few weeks to play with, and maybe I will get
> something going again.
>
> *I'm not sure of a "good" way to trigger the ignition module from the
> pic.  Normally it sees the signal from the distributor, which I don't know
> how to replicate, but I suspect there is an easy way to reliably trigger
> the thing.  Anyone?
>
> The MSD unit is the easier route, but I don't know how much it costs.  I
> can tell you that I will have $40 tied up in parts for this project, for
> whatever that's worth.
>
> -Steve
>
> ----------------------------------------------------------------------------
> To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org

----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org