As @Jerryg says, replace the plugs. Then I'd replace the fuel injector wiring, from the club store.
There's a troubleshooting rule they taught in Navy ET School, "Check the easy stuff first!". When you're working on a big radar or transmitter with a gazillion parts, you quickly learn how useful and appropriate this is.
There's a troubleshooting rule they taught in Navy ET School, "Check the easy stuff first!". When you're working on a big radar or transmitter with a gazillion parts, you quickly learn how useful and appropriate this is.