Running super rich?
Just did the 5 piece spacer kit and new NGK Iridium plugs on my 05 3.5SE. The car also has the VIAS Plate done along with an Injen cold air. I still have the exhaust to do but the car is running strangely. Firstly I was lucky enough to have no bad idle or Check engine light after the plugs and spacer kit. But I have little too no low end power any more. After the VIAS plate a big chunk of low end was gone but now its even worse. At WOT the car and gently accelerates until ~3.5-4K RPM then takes off like a rocket. Also in 3rd gear it hits the power band but at 4.5K the power drops off for a second. then kicks back in at 5K, but only in 3rd. Its got a more uneven power band then my brothers evo. Also the plugs I took out were brown all the way up the threads and reeked of gas. I assume I need a tune to lean the car out asap. Does that sound right to you?