Take it to a garage.
An engine cylinder misfire is what happens when combustion is incomplete. How much it costs to fix will depend on the type of car and the year it was manufactured.
The exact cost to fix an engine cylinder misfire on a 2000 Mercury Mystique will depend on the exact type of engine it has, but can cost around $1,000.
start with wires
Have you checked the spark plug wire for that cylinder,??????????
P0304 is a cylinder #4 misfire. Check plug, wire, coil, etc.P0304 is a cylinder #4 misfire. Check plug, wire, coil, etc.
A cylinder misfire can be cause by a bad spark plug or a bad fuel injector. Replace the spark plug to see if the problem is corrected.
A misfire is when one of the cylinders is accelerating without actually doing anything, it's just a dead-cylinder. In order to fix this you need to tighten the cylinder or adjust the engine connector.
Find and repair the cause of a misfire on cylinder #5.see related question below.Find and repair the cause of a misfire on cylinder #5.see related question below.
A cylinder misfire could be from a bad spark plug, bad spark plug wire, or a bad coil. It could also be caused by a plugged or faulty fuel injector.
p0302 is cylinder 2 misfire, you need to fix the cause of the misfire. Possible causes are plugs, coils, injectors......
1: Replace the injector. 2: If still misfiring, replace the engine.