Cylinder 3 misfire P0303 code resolved, VALVE SPRINGS

After dealing with the rough running engine for years and replacing the spark plugs, plug wires, coil packs, fuel injectors, fuel pump and filter and air intake sensor and doing a smoke test for vacuum leaks, I finally resolved it. It was the 2 valve springs on cylinder 3. Its the middle cylinder on the right drivers side. I haven’t had an issue since and it runs great.
The job took 2 hours in the garage and was easy for a mechanic mind. Make sure you have or rent a good spring compressor.
*Its probably better to do all the springs at once because others will start to fail later on.

[@GurjeetSingh-lz8lp]

Did you have video .? How you did it

[@terryschoenberger9192]

I dont have a video. Its not simple and it will require a mechanic. Its better to do all the valve springs on all cylinders otherwise they start going bad too.