I have a 02 2500 with the 5.9 magnum with a misfire I can’t figure out. I changed the plugs, wires, coil pack, distributor cap, a good compression check and the injectors but it’s still misfiring off of multiple cylinders. Please help 😂

 

What plugs did you install? How old are the O2 sensors? Done a compression test?

 

Plenum gasket fixed?

 

the compression test was good and I put nkg iridium plugs in and I’m not sure how old the plugs are

 

that’s what I’m thinking my next move will be

 

The plugs may be at least part of your problem. Change 'em out for some good copper plugs. These engines tend not to like the rare earth fellers.

 

ill do that asap thank ya

 

If you're giving a code that says random misfire on a specific plugs. This just happened to us the other day random misfire on 2 and 7. That's all it said. So we pulled the plug and the porcelain near the tip of the spark plug had been chipped. Hope this helps if not it may help someone else in the future. Have a good day