Parts List & Operating Instructions Form No. 107340, Sheet 2 of 3, Back
Decarbonizing the Engine
1. Read, understand, and follow Safety Precautions in this document before using the Fuel Injector Cleaner.
2. Run the vehicle until the engine reaches normal operating temperature. Shut OFF the engine.
3. Turn regulator on top of Fuel Injector Cleaner to full OPEN position (counterclockwise). Leave the tting
on the end of the regulator open— do NOT connect shop air.
4. Close the shut-off valve at the bottom of the Fuel Injector Cleaner. Note: Valve is OFF if it is turned all the
way clockwise.
5. Remove top and regulator assembly from Fuel Injector Cleaner. Fill the container with up to 16 oz. of
decarbonizing uid. Install top and regulator assembly.
6. Connect the canister hose to a decarbonizing adapter such as OTC No. 7666.
7. Locate a manifold vacuum port (NOT ported vacuum) near the throttle body or carburetor. This will more
evenly distribute the decarbonizing solution.
8. Connect the decarbonizer hose (with adapter) to the manifold vacuum port. See Figure 2.
Manifold
Vacuum Port
Throttle Body or
Carburetor
Intake Manifold
Engine
Decarbonizing
Adapter
(OTC No. 7666)
7448A
Canister
Figure 2
9. Start the engine. Manually increase throttle to 1,500 RPM while slowly opening the shut-off valve. The
engine will run rough and RPM will decrease. Do NOT manually increase RPM.
10. When the container is empty, turn OFF the engine.
11. Remove the adapter tting from the engine. Connect the vacuum hose.
12. Let the vehicle sit for at least 30 minutes to allow the solution to work on soft carbon deposits.
13. Test drive the vehicle for at least 15 miles to ush loosened carbon deposits out of the system.
Note: Until the system is cleaned out, the vehicle may start hard, run rough, and there may be heavy
white smoke from the tailpipe.
To Next Page
Loading...