NUMBER: 14-21-15
DATE: 05/06/15
REVISED: 05/11/15
| APPLICABILITY: | All Models |
| SUBJECT: | Fuel Pressure Gauge Hose Set (J-49863-1) Modification |
INTRODUCTION
This Service Information bulletin outlines a procedure to modify the fuel hose assembly included in the fuel pressure testing kit, Subaru
Special Tool number J-49863-1. For the fuel pressure gauge to operate properly and provide accurate test results, the internals of the check valve portion of the hose assembly must be removed.
SERVICE PROCEDURE / INFORMATION
- CAREFULLY loosen and remove the check valve / hose assembly from the manual shut-off valve. No other disassembly of the hose assembly components is necessary.
- CAUTION: Wear Safety Glasses
- Remove the small internal snap ring located inside the (now removed) end of the check valve.
- While covering the end of the hose containing the check valve securely with a clean shop cloth, slowly administer compressed air into the opposite end of the hose assembly to gently release the internals of the check valve. A photo of the removed internal components is shown below.
- To avoid possible fuel system contamination, remove any remaining sealant from the threads of the check valve body and the manual valve. Apply a small amount of PTFE pipe sealant (or Teflon tape) to the male check valve body threads and re-assemble.
NOTE: To connect the fuel pressure test kit to FB engines, the additional items shown below are required.
P.N. 42075AG690 Fuel Hose P.N. 18471AA000 Adapter
- Refer to the March, 2012 issue of TIPS for more fuel pressure gauge kit / testing information.
REMINDER: SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time.
Always refer to STIS for the latest service information before performing any repairs.
- QUALITY ASSURED
- Reduces: rough idle, engine surge, hesitation, and spark plus fouling
- 20 oz. bottle.
- Improves: cold start performance, and fuel stability for up to one year
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
- DEEP FUEL SYSTEM CLEANING - Cleans the entire fuel system (injectors, carburetor passageways, intake valves, and chamber areas) to help restore power, MPG, and throttle response.
- FUEL ADDITIVE FOR GASOLINE AND DIESEL ENGINES - Breaks down fuel residues and varnish for smoother idling and cleaner combustion in gasoline and diesel engines.
- OIL TREATMENT FOR ENGINE CLEANING - Cleans sludge and deposits that can restrict oil flow and lubrication in motor oil crankcases, helping support longer engine life in car and truck engines.
- FUEL STABILIZER - Keeps gas or diesel fresh for up to 2 years. Ideal as a fuel stabilizer and gas stabilizer for stored cars, motorcycles, and generators.
- SAFE FOR ALL ENGINES & FUELS - Compatible with all gasoline and diesel fuels and blends, including E10 and E85. Trusted for use as a gasoline and diesel fuel additive.
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
- The world’s #1 fuel additive for both gasoline and diesel engines
- A great tune-up in a bottle – treats gasoline, diesel fuel and increases MPG
- Cleans and lubricates the fuel system, including fuel injectors, carburetor and combustion chamber
- Improves fuel economy by burning excess exhaust emissions
- Increases power and acceleration by improving fuel flow and reducing deposit buildup
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
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