I have one on my jeep even though it's fuel injected. Some of us 4x4 guys with manual transmissions install them because it allows us to keep the rpm up while one foot is on the brake and one lets off the clutch when crawling, hill climbing, etc. The one I use is like a choke cable except it has a tee handle that turns to lock. Push in gas pedal, pull out cable, rotate handle clockwise 1/4 turns, let go of handle and pedal.