Engine misfire

When it starts misfiring does the check engine light comes on?

Possibilities here could be one of the following:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it

There are many things that can cause a misfire. If the check engine light is on, have the computer scanned to identify where the problem is coming from. Check for tune up.

once in a while car would miss and as days went on doing it more . slips more going up hill or when you give it more gas. if you gas a little seems ok but more gas and power slips more. the more power you give the car the more it misses but when I go like 25 miles an hour does ok.

have a trans guy look at this. soundslike overhaul time