Hello,

I took my car to a tuner and he couldn't get the car to stop adding too much timing low/mid range. Like if your in 3rd cruising and hit the gas, it feels restricted. The car is down on power on the dyno also. He suspects the cats are plugged or something is going on with the traction control. I am going to back pressure pressure test the cats this weekend. I don't want to waste his time bringing the car back with issues. What else can I check off the list that could cause this to happen? The car smells rich when it starts. Like a noticeable gas smell.

K&N CAI
Kooks Mufflers
X-pipe
Catch Can
Choppy Cam

Thank you in advance!
Harry