Mysterious black box id...

[Rexdina at aol.com]

    FUEL MODULE-------5.7L  G Van & 5.7L or 7.4L  over 8500GVW
  "When the key is first turned "ON" without the engine running, the ECM 
turns a fuel pump relay "ON" for two seconds. This builds up the fuel 
pressure quickly. If the engine is not started within two seconds, the ECM 
shuts the fuel pump "OFF" and waits until the engine starts. As soon as the 
engine is cranked, the ECM turns the relay "ON" and runs the fuel pump.
    On the 5.7L engine in the G van and all 5.7L or 7.4L engines in vehicles 
over 8500 GVW, a fuel module will override the ECM and the fuel pump will run 
for approximately twenty seconds. The fuel module corrects a hot restart 
[vapor lock] during a high ambient condition."
     NorthStar H R
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