my problems with my car, i don't know. When i start is it is running fine, but when you put it in gear there is no power and the engine starts to shake. We have the catalyst converter clean, down/up stream oxygen sensor replace, spark plugs, fuel filter & fuel pump replaced. It is still the same way. When we had a mechanic diagnose it they just gave us a code: PO300... please help me... i don't know anything about cars.
Sep 15, 2010 at 2:15 PM
