<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">Gents,</div><div dir="ltr" data-setdir="false"> A few days ago I replaced the sparkplugs, ten years old or more, with six NGK BP5ES plugs gapped to 35, and a Pertronix 3 ohm coil. I've not yet changed the wires, distributor cap or rotor. Today I drove the BJ8 almost 200 miles without incident at speeds up to 60 mph. While going 80 mph on the interstate, over a span of two or three seconds, the car bucked and backfired three times. I immediately dropped the speed to 50 and then gradually back up to 80 with no further backfiring. What could have caused this discomfiting turn of events? Thanks for your thoughts.</div><div dir="ltr" data-setdir="false">rich antal</div></div></body></html>