1995 Taurus 3.0 L
I recently bought a 1995 Ford Taurus 3.0 L with 65000 miles. The car looks and runs fantastic when you first start it. After about 30-45 minutes when I come to a stop the car starts vibrating a little and the idle speed decreases. The oil light also starts flickering when this happens. I can put it in neutral or sometimes just turn off the A/C and the idle speed increases and there is no flickering. I know this car had overheated prior to my purchase and the head gasket was replaced.
I can turn the car off for a few minutes and when I start driving it again the whole process repeats.
I considered just trying to set the idle speed up just a little to see if that would solve the problem if I can figure out where the adjustment screw is.