Coachbuilder1· Premium Member
If you haven't already run a tank of seafoam through your truck, this will not only clean the injectors but clean the carbon in the heads. The cats work after the exhaust temp reaches 700-750 degrees. After you've run the seafoam out fill up with 15 gallons of 91 or higher octane and 3 oz. of acetone. If your truck runs good You will pass... the acetone is the key. It allows the fuel to burn much more efficiently and reduces hydrocarbons to extremely low levels. You'll also enjoy about 40 more miles in that tank Please update.