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<p>From : Greg at Chrysler</p>


     <p>Mopar Combustion Chamber Cleaner/Conditioner is really good for
     removing carbon deposits, but the directions on the can are not so
     useful.  The following directions outline the way that professional
     mechanics have been using the cleaner for years -- they were finally
     published in TSB 18-31-97 for 1996-98 Jeep 4.0 Liter misfire
     conditions:</p>

     <p>decarbonizing Procedure</p>

     1. Operate the vehicle until the vehicle reaches operating temperature.<br>
     2. Remove the air tube from the throttle body.<br>
     3. With the engine at an idle, spray the entire contents of
        Mopar Combustion Cleaner, p/n 04318001, directly into the
        throttle body.  Allow the vehicle to load up with the
        cleaner to the point of almost stalling out.<br>
     4. Shut the engine OFF after the entire can is ingested.<br>
     5. With the hood closed and the vehicle parked inside the
        garage, allow the vehicle to soak for two to three hours.
        This will ensure that the engine will maintain its
        temperature and will allow proper solvent penetration.<br>
     6. Drive the vehicle on a highway/freeway that will allow the
        vehicle to be driven safely at the posted speed limit.
        Upon entering the highway/freeway, accelerate hard to the
        posted speed limit and maintain speed.  Slow down and then
        perform 5 to 10 Wide Open Throttle (WOT) upshifts.
        Continue driving at the maximum speed limit for 1-2 miles
        (if conditions allow).<br>

     <p>Greg Smith</p>

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