Quote:
Originally Posted by Supspt454
Yes, there was an electric solenoid that was operated by the throttle pedal switch which acutated the vacume solenoid on the cowl flapper. That is how the cowl flapper door knew when to open. At WOT.
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There are 2 doors on the cowl, the one on top that you see open is vacuum operated. There is also an inner door that is controlled by an electric solenoid and the gas pedal switch.
They are basically independent of each other. The inner door stays closed when the engine is off. When engine is running the inner door opens when the gas pedal is pressed down.
The outer door stays open when engine is off since it's vacuum controlled. With engine running vacuum pulls it closed, mash the pedal, vacuum drops and door opens.
01-09-2011, 07:59 AM
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