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Start with the basics, check out all of the relevant systems to establish a basis for any repair strategy. Don't automatically replace anything until you haveestablished reasonable cause for replacement. It costs too much to do it the "maybe I'll get lucky and fix it way".
Compression and valve lash.
Ignition timing and a visual inspection of the cap,rotor and wires, looking for any significant wear on anything that creates spark.
Once you are sure everything ignition and compression wise is in good shape, then you can dig into the fuel delivery system, it get's complicated from that point.
regards
mech
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