P0304 Chevrolet - I have a 1998 s-10 with a 2.2. I keep getting po304. What could it be?

Question

New ignition parts. Getting good spark. Good compression

Answer 1

Hi thre,

I would check for a leaking intake manifold if the car is running rough. If the manifold gasket is fine, then a leak down test. This can determine more about whats happening then the compression test. It is also possible there is an issue with the fuel injector.