Ignition Miss @ speed- not fast or max rpm!!

Boat Doctor1

Petty Officer 2nd Class
Joined
Sep 29, 2012
Messages
123
1999 M/C 3.0 liter 4 banger chev. Have replaced cap, rotor, spark plugs. engine starts & runs fine till above 2500-3000 rpm then just misses out.Will run faster -yet still has a miss- like spark being interupted-does not die!! Not a fuel problem! This engine is an electronic dizzy having 2 seperate plugs to the dizzy, Help= suggestions??
 
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