why is my car still missing?

Question

I changed the catalytic converter i changed the plugs and wires ... could it be the fuel injecters or the feul filter..,. it doesnt miss as bad as before i changed everything bud ut still noticeable especially at idle and low speeds

Answer 1

Sir, you have a vacuum leak in the engines intake system causing a misfire in one or more cylinders.

Pop the hood and look around for a small vacuum hose that may have come off or has a crack in it.
You should be able to hear a sucking noise, or hissing sound while the engine is running.
Find the source of the sound. Look for a small metal tube sticking out of the intake manifold with nothing plugged into it.
Cover it with your finger to stop it from sucking air to improve your idle.
Now look for a dangling little hose somewhere that is suppose to hook up to it.