Been playing around with the
new (to me) car, getting used to it and such, and noticed something that makes sense from an OEM point of view, but not from a squeezing the every mile out of a gallon of gas.
When I depress the clutch, brake and come to a stop, it will idle at 1500 or so for a few seconds, then drops down to 600ish. Or, coasting down a hill, taken out of gear, it will continue to idle at 1500. Not until I come to a stop for a few seconds will it drop to a normal idle speed.
Talking this over with a handful of car guys I know point that this is probably by design. Keep enough vacuum to have the PB and PS work. Ok, I get that.
Is there a way around this, to have it run at normal idle while coasting? Initial thought says yes, need to figure out the vacuum setup, and apply vacuum (electric pump plus canister) to where ever the sensor is that keeps it in high idle. Maybe even plumb that same vacuum source into the PS and PB system with the use of a one-way valve to draw vacuum as needed.
Or has this all been done and my searching has been lackluster?