fast idle and I think I know why
I have intermittent fast idle, only when i let off on the gas slowly. I have tracked it down to my throttle body valve not closing all the way when I let off on the gas. If i punch the gas pedal it returns to normal. If I push the throttle shut by the return spring on the throttle body it idles fine. So, do I need to clean the throttle body while off the jeep, I tried to clean it by hand but it didn't help, or would a stronger return spring do the trick, do these springs wear out?