GM Fuel Pump control scheme

[Wes Branchflower]

>Uh-oh.  You've got an orange and you're trying to tell me my apple's not
>the same color.

he USED to have the car.. he sold it for a good price and bought a TD 
Gemini!! :) He finds it a lot more 'fun'.
>
>What modification?  Removing the oil pressure switch?
>Shannen

No, making some sort of circuit to disable the ECM's relay control when the 
car is running. That way the only thing keeping the fuel pump going is the 
oil pressure switch (held closed by the running engines' oil pump)
If the oil pump failed, there would be no more pressure to hold the oil 
switch closed, and the engine would stop. (saving it from running w/o oil)
Thinking about this it'd probably be easier to just wire up the ignition to 
the oil switch somehow. A simple circuit to override the oil switch to get 
the ignition going while cranking, then off when the engine starts. This 
might work better so the engine doesn't run that extra litte while off 
pressure in the rail.


You might think 'why bother' but with a soon to be $3000 built race engine, 
which is known for oil pump problems, I will :)


>----------------------------------------------------------------------------
>To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
>in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>

_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org