random misfire Bonneville gxp
I have ano 04 Bonneville gxp, rebuilt jasper, new coil packs, new plugs, i keep getting a random misfire code. Car doesn't feel different, but when I'm on the highway getting on it (80+mph) the service engine soon light will flash for a moment, then come on steady, no difference in feel at all tho. Light shuts of after 4 or 5 key starts then all is well until I hit the highway again. Any suggestions of where to look next?