GM CalPak Question

[Walter Sherwin]

Ludis,  does this mean that it is possible to externally recalibrate an
RFD, if one is armed with both a wet simulation bench and a reasonable
expectation of what the RFD should do?

Walt.





>>
>> Is there a way to set up the calpak in a GM car. Specifically a GN?
(1227148
>> ECM)
>>
>> I ask because it would be nice to be able to program backup fuel so if
there
>> was a serious problem, (ie: prom failure) and you had say 55# injectors,
you
>> wouldnt wash down the motor. I understand the calpak is a resistor bank??
>> (From a pretty decent source, but *could* be wrong I guess) Is there a
way to
>> change the InjConst used in there?? Or doesn anyone know what, if
anything,
>> can be done?
>
>Check out my web page schematics for the 1226864, 1227170, and 1228746.
>Pay attention to the RFD (RedundantFuelDevice) chip and it's connections
>to the CALPAK.  The '6864 doesn't use a CALPAK.  Instead it has resistor
>networks included on the ECM PCB.  This makes it a good reference for
>how the RFD chip is hooked up.