SO I DECIDED TO CHANGE CAP, ROTOR, AND PLUGS ON MY 455. THE ENGINE TENDS TO DIESEL A BIT WHEN I SHUT IT OFF, SO I DECIDED TO GO A HEAT RANGE COLDER ON THE PLUGS. THEY ONLY HAD A SET THAT WAS TWO RANGES COLDER, SO I DECIDED TO TRY THEM. I FIGURED IF THEY'RE TOO COLD, THEY'LL JUST FOUL OUT SOONER. THE FIRST TRIP OUT, THE CAR RAN VERY SLUGGISH. UNDER HEAVY THROTTLE IT SNAPS OUT OF IT AROUND 2500 RPM'S. IS IT POSSIBLE THAT THE PLUGS ARE CAUSING THIS, OR SHOULD I BE LOOKING FOR SOMETHING ELSE THAT MAYBE WENT AWRY WITH THE CAP AND ROTOR CHANGE?
