Does the car seem to slow down with the check engine light on? (Stillen Supercharger)

Originally Posted by kellyefields

i have the stillen supercharger as well and have this problem. I have the codes for multiple cylinder misfire and banks to rich. I am going back to have the tune checked to see if I am running to rich and to have colder plugs put in. I hope this will fix the problem. I think my problem is the fact that the car was tuned for a warm climate here in flordia and it has been in the 60-80 relm which would cause a rich condition but better than being lean when the temps start to touch 100. if you happen to find out a solution please let me know.