MOTORCRAFT Fuel Injector Cleaning System (94-8-9)

MOTORCRAFT FUEL INJECTOR CLEANING SYSTEM

TECHNICAL SERVICE BULLETIN

FUEL SYSTEM - MOTORCRAFT FUEL INJECTOR CLEANER - REPAIR PARTS AND SERVICE TIPS

APPLICATION

Model(S): Ford: 1987-88 Exp

1987-90 Taurus, Tempo

1987-91 Crown Victoria, Escort, Mustang, Thunderbird

1990 Probe

Lincoln-Mercury: 1987-91 Continental, Cougar, Grand Marquis, Mark VII, Town Car

1988-89 Tracer

1991 Tracer

Light Truck: 1987-90 Bronco II

1987-91 Aerostar, Bronco

Econoline. F Super Duty, F-150-350 Series, F-47, F-53, Ranger

1991 Explorer

Bulletin No.: 94-8-9

Date: April 20, 1994

ISSUE:

The Motorcraft fuel.injector cleaning system consists of:

• The original all-car fuel injector cleaning kit (CM1000),
• The new Ford-application fuel injector kit (CM1002) and
• Motorcraft Pressurized fuel injector cleaner (CM 1001).

The Motorcraft Fuel injector cleaning method was introduced in TSB 91-19-3 as an alternate to the Rotunda Fuel Injector Tester/Cleaner. The Motorcraft injector cleaning system is available from the regular Parts Distribution System or from local Motorcraft Distributors.

ACTION:

No action is required.

Q.  Why do we sometimes experience insufficient pressure to completely empty a cleaning can?

A.

If the can is pierced properly, you will seldom experience problems with inadequate pressure. However, to further reduce those instances of insufficient pressure to complete the cleaning process, Motorcraft recently made available a re-pressurizing device (S-79), which is included with all CM1000 and CM1002 kits, and is also available separately. The device allows service personnel to repressurize the can using compressed air whenever there is too little pressure to complete the cleaning procedure. Although there have been some cases of actual low can pressure, by far, the largest number of low pressure complaints have been due to improper can piercing. For best results, In addition to being hung up-side-down, during the cleaning process, the can must also be upside-down while being pierced.

Q.  Why is it imperative that the can be pierced upside-down?

A.

Motor craft fuel injector cleaner and the pressurizing gas are packaged together in an aerosol can. The piercing device contains a seal, which is intended to seal against the threaded cup of the can before it is pierced. When using a new piercing device with a new seal, the can needn't be upside-down. However, after a few cans have been pierced, the piercing device seal becomes compressed, and piercing can take place before the seal makes full contact with the can. The gas is always at the top of the can. Thus, if the can is pierced right-side up, the gas can rapidly escape before the seal makes full contact, resulting in insufficient pressure to do the cleaning job. If the can is upside-down when pierced, the liquid cleaner is in contact with the component being pierced, and the worst that can happen before the seal makes contact is the loss of a few drops of cleaner. Service personnel sometimes question the need to pierce the CM1001 cans upside-down, particularly if they have had experience with another injector cleaner packaged in what is referred to as a "barrier pack" can. In this case, the cleaner is in an inner aluminum tube which is surrounded by the pressurizing agent. In a barrier pack can, the pressurizing agent cannot escape unless a small rubber plug at the bottom of the can is removed.

Q.  Why isn't CM1001 packaged in a barrier pack can?

A.

There are several reasons. First, Motorcraft wants to provide an environmentally safe package, so it was decided to use compressed air or nitrogen to provide the pressure. It was not possible to use either of these gasses in the barrier pack cans since the cans cannot contain the required pressure for compressed air or nitrogen. Barrier cans generally use liquid propellant mixtures, and pressure is limited to 65-70 psig.

Also, with the barrier pack, upon completion of the cleaning procedure, a small amount of product remains in the collapsed inner tube, and the outer shell still contains the liquid propellant, which requires proper disposal. When the CM1001 can is empty, neither product nor pressurizing gas remains in the can.

Finally, the barrier pack can is considerably more expensive, and Motorcraft wanted to offer the most cost-effective cleaner possible.

Q.  How can dealers obtain replacement and supplemental parts?

A.

At the present time, all supplemental and replacement parts sales are handled directly by Shrader Canada Limited. Also, a toll-free number is available for ordering cleaning kit parts (1-800-662-6891).

The most frequently ordered parts are the S-20 Ford 5/16-32 multipoint adapter, the S-36 can suspension bracket and S-70 can piercing device, followed (in approximate order) by the S67 and S-62 seals, the S-72 diaphragm, disassembly tools S-17,S-18,S-41, and S-42, the S-44 plug, the S-45 and S-51 adapters, the S-48 female loop, the S-38 regulator and the S-69 supply assembly.

Additional questions concerning the purchase of supplemental parts should be directed to Shrader Canada Limited, at 1-800-662-6891.

NEW FEATURES

(Refer to Fig 1 .)

As a result of suggestions from technicians in the field, a variety of new kit parts and features are now available in the CM1000 (all vehicles) or the CM1002 "Ford Only" kit:

• A patented repressurizing device (Part #S-79). This device ensures that all the cleaner is used and that the empty container can be disposed of without special handling.
• An improved, longer lasting pressure regulator.
• A replacement cutter for the S-70 piercing device (Part#S-70).
• A new piercing device made entirely of steel (Part #S-70).
• A right angle Ford Multi-point (Schrader valve) adapter (Part #S-84). This adaptor makes it easier to connect to the Schrader valve on vehicles that are hard to access.
• A Probe/Mazda adaptor that replaces the fuel rail pressure regulator during the cleaning process (Part #S-78).
• A replacement depressor for the S-36 supply hose (Part #S-36d).
• A depressor for the Multi-point adaptor (Part #S-20d).

The following Improvements are only available in the CM-1000 (all vehicles) kit (or by special order):

• New locking pliers for clamping hoses (Part #S-77).
• Fuel resistant foam drawer liners.
• A parts and adaptor location chart

OTHER APPLICABLE ARTICLES:

91-19-3