Ford TSB procedure for de carboning 4.0L

[96_4wdr]

TSB 01-19-7SERVICE PROCEDURE

1.	Use Motorcraft Carburetor Tune-up Cleaner PM-3.
2.	Carbon removal: a. Disconnect canister purge line from throttle body. b. Attach a vacuum line to the canister purge port. c. At hot engine idle, allow the engine to ingest 1/2 to 2/3 of a can of Motorcraft Carburetor Tune-up Cleaner. Use caution not to ingest too quickly due to potential hydro-lock issues. d Shut engine off and allow it to soak for one hour. e. Start engine, allow engine to ingest the remainder of the Motorcraft Carburetor Tune-up Gleaner. f. Remove vacuum line and re-install canister purge line. g. Road test vehicle at 3500 RPM for 2-3 miles. h. Repeat above procedure two times for a total of three times. i. Change oil and filter.
3.	Review the customers' driving habits. The recommended drive cycle should include daily periods of engine operation above 3,000 RPM, such as a brisk acceleration from a stop position. This will break/burn the carbon off the piston head.
4.	Use regular unleaded fuel, 87 Octane. Mid-grade and Premium fuels may increase the probability of carbon buildup, leading to a knock noise.

[marty600]

Interesting..i wonder what the aftermarket equivalent of this chemical would be.
This job must be the same thing they charge like $100 for, at places like NTB, pepboys, etc.