Weird issue while idling when its cold engine
Heres the deal, I allowed to wait for my 94 topaz 2.3L auto, Ive been noticing, when I start the car up when the motor is cold, I get a weird ping (knock) like low octane sound @ idle, Then the other thing is I drove my car in the morning I allowed it to do idle only 2 mins, Then while idling in the drive thru, Motor idle starting vrrrmmm vrmmm, bouncing up and down, then I rev it yup little bit then it stopped. ran fine and there is no performance issue while warmed up, Runs great. This what has been done: New cap / rotor / Plugs / Wires / Fuel filter / Air filter. Any ideas would greatly apperated.