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Originally Posted by HELLRAISER
I`ve got an `87 hardbody with the NAP-Z 4-cyl with 8-plugs. Starts and idles fine but after half throttle it starts miss firing bad. The second (intake?) coil stops completly. I`ve swapped the coils out for new, checked all the wires, new plugs, cleaned the cap and rotor. Getting fuel pressure at all times. Any help would be great. If I don`t get it figured out by Christmas, going to build a 360 Mopar and fit it in!
I`ll have to post some pictures of it throwin some sparks from the frame when I get them downloaded!! ~DREW~
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Your cap and rotor could be your problem. I've seen a brand new cap and rotor installed and not too long, the cap went, causing misfiring.
Do you have a multimeter at home? With that, you can check all the cables and cap for continuity. Ohm meter will work to test for resistance of each circuit.
If you have a good spare spark plug cable that's long enough to reach all 8 plugs, you'll know which wire is bad.
360 Mopar!? C'mon, man! 350 Chevy small block! parts are cheap and plentiful!

hehehe