DIY Adjustable Idle-Speed Controller, With Both Automatic or Manually Adjustable modes

Home made Fully Adjustable Idle-Speed controller for our older Jeep Cherokees & Grand Cherokees... You can choose from Auto controlled (Stock), or Manual controlled (Adjustable) back and forth on thr fly with one simple click of the knob to choose between modes... It always defaults into Auto-mode after each power cycle of the key, so you never have to worry about it on your daily driver since it's literally same as stock till you press the button to swap it over to Manual control...

Works like a champ, and does not trigger an engine light at all, and is totally safe to use...

It has TONS of usable applications in the real-world too for raising the the rpms up & holding them steady for winching, or just for more alternator output, or faster warm-up times in the winter... Or idle it all the way back the other way, and have it hold back (engine-brake) really well down hills!