97 3.8L. Since the snow is starting to meltI decided to get my Camaro out of storage Monday. Just so figures it would snow all day Monday. So I changed the oil, etc. and the engine light comes on. Run it in the computer and it's the thermostat, not a big problem, replaced it this morning and the light goes off. Not less than 20 km later down the road, my cat starts rattling extremely loud (the honeycomb was a bit loose before, just keeping cat on til tomorrow whenI get emmisions test then its off) and my car starts shaking bad and the throttle is non responsive. I figure the loose honeycomb is blocking the exhuast.All I can get my car to do is 50 km/h down the highway til i get to my dads shop were i resort to hammering away at the bottom of the cat. Turns out that worked, car runs fine now but engine light is on again. So I head home and I meet brother on the road, shut my car off, and then it takes 20 min to start back up. (battery is fine just wouldnt start). So just 30 min ago I dropped my car off at the mechanics, hopefully all it needs is a new cat, and hopefully the **** I knocked loose triggered the sensor behind the cat to turn the engine light on.

 

If your cat isnt working properly yes that will throw a code. Otherwise when it wouldnt start what did it sound like? Was it cranking at all or just completely dead? I had some trouble with my car starting after it had ran a while back and it turned out the fuel pressure regulator was shot. Little more info would be awesome though