P0300 Chevrolet -

Question

My chevy impala 05 3.4 has a p0300 random misfire nobody can fund the problem it's misfires u can hear it by the muffler it goes like  proof proof proof and white smoke comes out exhaust and it's very strong pollution has my gas needle moves up and down a little bit. And it be hard to start takes a long crank time sometimes I have to hit pedal to start car and sometimes car stalls at stops or red light while in drive. Also spark plugs have little oil on them and when reversing motors shakes also car really misfires bad in the cold sometimes in heat also. Please help me find exact part or problems thanks.

Answer 1

Hite smoke out of the exhaust system, mechanical condition such as the intake manifold  tends to leak coolant into the intake system as well as a head gasket

 Do a compression test or cylinder leak down test, what you describe is more a mechanical condition