My high mile protege5 has a very rough idle and a chirping sound coming from the tailpipe on idle. I have changed the plugs, ignition coils, removed and cleaned the egr valve. Any ideas? When I idle the motor shakes more than normal and when I put in gear and start to accelerate it sounds like a miss or air escaping from engine somewhere (i am just describing sound i know air is not escaping, almost like exhaust leak up front). It only makes that sound when in gear not at idle or rev while idling. I am stumped.
Thanks.
Thanks.