Me & my dad changed out the valve cover gasket because it was leaking & now it wont start. We weren't getting spark from 2 of the plugs when testing the ignition coil so we put in a new one & still no spark, only from 1 of the plugs did we get spark! Fuel pump is good. My friend said maybe it's the crank sensor or something to do with the wiring? We painted the gasket head & cleaned most of the wiring, maybe water somehow affected it? Not sure what to do anymore.

 

Any helpful tips or advice?

 

I've never heard of a single plug firing of the coil ... I'd inspect the wiring you moved/cleaned you might have dislodged a plug or pinched a wire