ignition coil or catalytic converter?
the other night i was driving on the highway and out of nowhere i lost power. not electronically, but i lost power when i pressed on the gas. the car started missing and backfiring lightly. i got off the next exit and at the stop sign, the car stalled. i easily started it again, but it idled VERY rough and still backfired lightly- and would stall again if i didn't maintain a little gas at stops. the car cranks and starts, and sometimes it'll run for a minute or two before it stalls. other times it will stall after just a few seconds of me not pushing the gas pedal.
i researched as much as i could and i'm having a hard time figuring out if it's the coil or the cat. converter.
some of the symptoms of a bad converter are present...i can hear a light "ping" under the driver's side when the car is running rough, which a friend told me is my cat converter rattling around.?
however, the symptoms of a bad ignition coil are very similar as well.
not sure which to start on-- is there a sure way to test failure in one or the other?
thanks in advance for any advice what so ever..