GM Fuel Pump control scheme

[Ludis Langens]

Bob Wooten wrote:
> 
> limp home mode sounds most plausible to me, but how does it get the motor
> started?  no oil pressure no fuel, no fuel no oil pressure.

When the engine in cranking, it'll eventually build up enough oil
pressure to trigger the switch.  People who have had broken fuel pump
relays report exactly this behaviour.

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
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