2002 Mustang GT Emissions Fail! HELP!
 

Hi everyone. I am looking for advise on how to pass emissions in Chicago, IL with my '02 GT. It was modified and tuned by Sutton HP which is no longer in business. I have Bassani mid-length headers, a Bassani X-pipe w/no cats, and a Magnaflow cat-back. The passed emissions successfully for years post modifications, but apparently the state of IL has made the testing more strict and now no matter what I do it won't pass. What can I do in order to pass emissions with my car? Please help....

Ether pay off a shop to give you a sticker, look into getting stock parts to put on the car for inspection purposes, or move to a state that doesn't require emissions testing.

Did they explain why it failed?

Change the oil, idle it, change the oil again, get it tested immediately. There is also an
additive you can buy a Walmart that says it guarantees to pass emissions, or your
money back.
https://www.walmart.com/ip/CRC-05063...12-oz/19853345

Cars can fail if there is gas-saturated oil in the pan. I always take mine in after a
fresh oil change.

There are other products:
https://www.walmart.com/ip/STP-Emiss...unces/55350440

https://www.walmart.com/ip/Emissions...tion/123437624

It all depends why it failed. What is new about the inspection process? They dyno it, they plug in an OBDII scanner? What?

Dyno with a sniffer could be like MustangDude described, OBDII scanner could be sensor related (O2 sensors turned off or unplugged...etc.