Manual idle control

[Gary Moulton]

Hi,
I have a 1994 Jeep, 4.0L engine with MOPAR's efi system. I would like to
electrically control the idle for a slower speed and be able to increase
the idle for winching or running my onboard air compressor. Back in my
GM repair days we had a tool that plugged between the IAC and its
harness with a switch that would step the idle up or down, can a
home-brew item like this be built for this type of efi system?
Thanks in advance
GaryM