[huda424]

last week i changed the plugs on my sr (ngk iridium) and everything was running fine. later that day i gor some 93 oct. gas fill the tank. so today when i turn on the car the sr was acting kinda rough. it would turn on and then after 30 sec it would stall out by it self. the car would hunt and then stall out. when ever i rev the car i would hear a grinding sound after the needle goes down the the idle rpm which is at about 1100. i noticed that the cat has rusted and broken off at the flange. that might explain the grinding sound but what about the constant hunting of the needle and the stalling out???????