If you have an engine code that is saying misfire on these cylinders it is usually a bad coil on the plugs of those cylinders. You are probably going to need to have them replaced. Check and replace the plugs if necessary.
P0302 is a #2 cylinder miss-fire
Take it to a garage.
have a miss fire on a3.0 1998 ford what are possible causes
A cylinder misfire on cylinder 2 in a Ford Escape engine indicates a faulty spark plug, plug wire, or ignition. Hooking an OBDII code reader to the vehicle can narrow down the cause.
For a good start, try some of the suggestions and ideas in the "Related Question" below.
My #1 cylinder is miss firing, I'm thinking coil or plug? I don't know much about this car.
What do I do bout a 2 cylinder miss fire on a 2008 Mitsubishi Eclipse
Each cylinder needs fuel, compression and spark. You are missing one of those.
do a compression check on that cylinder. check fuel injector for pulse.
Most common cause would be the plus wires. Dampness causes them to arc and the cylinder that the wire is arcing on won't fire causing a miss/sputter.
Get the codes read. Auto Zone will check your codes for FREE.
A mis fire occurs when the fuel/vapor mixture does not ignite and burn properly in a cylinder.