3.0 omc missing

[Frankpic]

I have a 1987 omc 3.0 that developed a misfire while under load I already changed plugs, wires, cap,rotor ,and coil also fuel line it’s been changed over to electronic ignition already before I purchased it

The volt gauge bounces around

I’m at a loss any help would be greatly appreciated

 

[Scott Danforth]

welcome aboard

your voltage gauge should be rock solid steady and not move

check all your connections

it wouldnt be the coil, so you just spent $50 for nothing

check the plug colors and report back.

 

[kenny nunez]

Also check the backside of the instrument panel and ignition switch, put you fingers on every terminal to see if there is a loose connection.

 

[matt167]

missfire would have me checking compression and valve adjustment. It's just a Chevy and should have hydraulic lifters so you can adjust them running most likely