2018 Mustang GT emissions

[Mustang520]

Hello I have a 2018 GT Roush charged with Kooks exhaust. I had a non catted tune in the car and just put my cats back on and my evap will not get ready. I put about 800mls on the car since I loaded the catted tune. I did all the things they suggest to get it ready drive 5 minutes at 50mph l drive 60mph for 5 minutes do multiple cold starts, make sure there more then 1/4 tank of gas and a few other things. If anyone has any suggestions on how to fix it lol please let me know thank you

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[Zelek]

Is it only evap or are your O2/HO2 also not ready?

 

[Mustang520]

It’s just the evap and 02. I just need one of the two to go off it’s driving me crazy lol

 

[drive_55_not]

When you say Kooks Exhaust is that LT's or just catback?

Here's the Ford OBD Drive Cycle.

Drive cycle

The EVAP is the last to go ready and I don't believe it will set until the O2's are ready.

Good Luck ...

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[Mustang520]

Thank your. Yes kooks longtubes with green high flow cats.

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