HELP Please P0420 code,Catalyst Efficency Below Threshold
My new Turbo Back set off this code because of the High Flow cat. I no there is a quick fix for it using 18mm spark plug anti-foulers. Does anyone no where I can buy these already pre made for this situation or do I have to drill? Please Help. Thanks
You can buy these 18mm sparkplug anti-foulers at local autoparts store at the "HELP" section. Part number is #42009. it should cost no more than $5 for a pair.
For detail of how-to, check this link https://www.evolutionm.net/forums/sh...ad.php?t=98573
For detail of how-to, check this link https://www.evolutionm.net/forums/sh...ad.php?t=98573



