Question

Sets code P0304, eliminated wire, coil, plug, injector, and check compression. What else could it be? Also, it does not do it all the time on a 2007 Chevrolet 1500 4x4. 5.3L flex fuel

Answer 1

HI there,

I would suggest a leak down test. You might have some carbon build up on one of the valves, this won't show up on the compression test but usually will on a leak down test.