EFI332 Fuel Pump On/Off Algorithm

[steve ravet]

> Although I intended to direct this question to Al Grippo, I would
> appreciate everyone's inputs to the following subject:
> 
> Does the EFI332 project plan on implementing an algorithm to 
> control the fuel pump (relay)?  From what I understand about
> OEM ecmm's, they turn off the fuel pump if the engine hasn't 
> started for X seconds.  
> 
> I would be interested in knowing if they still implement this,
> and if so, what other factors contribute to controlling the
> fuel pump?

Both my GM TBI engines have this.  The '86 2.8L would start the pump 
when the key was turned to on, and shut it off after 10 seconds if 
the engine wasn't started.  My '91 5.7L is the same, except it only 
runs the pump for 3 seconds.  I assume it starts the pump again if 
the key goes to start...

The only other FP thing I know of is the oil pressure sensor relay.  
The ECM controls one ground to the fuel pump, and the oil pressure 
relay controls another.  So if the ECM dies, but there is still oil 
pressure the fuel pump keeps working.

sorry about that empty reply, hit the wrong button.

--steve

> 
> Thanks,
> 
> -- 
> Bill