Took my car to get it dynoed now that I have HFC, Exhaust and CAI. The guy couldn't get an accurate RPM/torque reading and blamed my spark plugs.. the rpm's read fine until about 5500 RPM and then started jumping and went back on track, happened through out 4 dyno pulls on a dynojet. He said his wires were new so that couldn't be it. I also recall that people have had difficulty reading my RPMs accurately when dynoing ever since I bought the car from the factory. He told me to gap the stock spark plugs to .26 I believe. I read somewhere in the forum that you should never gap OEM spark plugs? What do you guys think?