Setting up a 1227749 on the bench for testing.

[Walter Sherwin]

Thanks Bruce.  I shall give that a try...

Walt.



>
> Can be difficult in that some ecms expect a Test signal back from it.  ie
> within a certain time period it will send an extended PW to the injectors
> and it expects a O2 signal to relfect that.
>
> On some cals, you can just run a take off from the injector pulses, to
> *flash* an LED.   ie 1K resistor to LED and then LED to ground.     Now
this
> will give you a 1.8v drop across the LED.   Run two 10K resistors across
the
> LED, and you have a pulsed .9v.    The 0-.9v swing works for a similated
O2
> feedback, on many ecms, but not all.   When doing 749 stuff I generally
> disable the 13-44-45 trouble code
> Bruce
>
>
> > Is the stim board mentioned below, fairly easy to adapt for general
bench
> > testing of GM boxes?  I see that the stim board supports 48 & 60 toothed
> > crank wheels and cam sensors and such, but, will it also handle the old
> > dizzy stuff and interface readily with the older GM boxes?
> >
> > While on the topic of test benches, what's the best way to simulate the
> C/L
> > O2 signal?
> >
> > Walt.
>

----------------------------------------------------------------------------
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