Suddenly the steering pressure switch has failed. What does it do. As it is either on or off I thought it may be to increase the engine power at idle when the steering is turned.
Cannot see much change when the input from the switch is shorted or open.
If it is removed will the oil leak fast or slow?
didn't leak to much when i took mine off just drain it into a tin, get something to cover the kframe before you do it or just wipe it clean after. very easy job should only take you 10-15min.
Is that the only purpose for the pressure switch?
Shorting or opening the terminals has very little effect on my engine because the ISC motor must be adjusting the speed. Controlling the speed with the computer would be a faster response and would also be a better way to control the idle. Perhaps the left hand of the Ford design team does not know what the right hand is doing.
May leave it shorted and note what happens.
I would just leave it open circuit, it might bump the idle up and use more fuel.
I suppose if it isn't doin anything, it won't matter what u do with it.
A faulty switch may cause unexpected problems because now it is bridged closed the engine seems better. Have not tried it open. The switch had a resistance and was neither open or closed. But before it failed it may have been dropping in and out and giving a confusing message to the computer.
From information found on the net, it would appear to be useful if the idle speed is set very slow.
The pressure switch is there for diagnosis, if you notice it is on the high side of the unit, it detects pressure (either excessive or too low) and logs a fault code.
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