3 years ago

5.5 initial diagnostic check: efi -

5.5 initial diagnostic check: efi -


HOME DIAGNOSTICS Diagnostic Notes The reference numbers below correlate with the circled numbers on the Test 5.17 flow chart. Fuel Pressure Regulator 1. See FUEL PRESSURE REGULATOR, REMOVAL/IN- STALLATION, in the Touring Service Manual. 2. If fuel system has pressure, but it is less than specification, check for the following conditions. Figure 5-35. Underside of Canopy 13. Pull up on sleeve of quick-connect fitting and remove fuel supply line from fuel pressure gauge adapter. Release adapter from fuel tank in the same manner. 1WARNING f1940x9x a. The amount of fuel to the injectors is within limits, but pressure is too low. Also, hard starting cold and overall poor performance condition may exist. b. Restricted fuel flow causing pressure drop. However, if pressure drop occurs only when driving, engine may surge and lose power as pressure begins to drop rapidly. 3. This condition may be identified when the fuel level is low and the fuel pump is turned on for the first 2 seconds after key ON. A metallic ringing sound can be heard as the high pressure fuel is sprayed against the inside wall of the fuel tank. To avoid an uncontrolled discharge or spray of gasoline, always be sure the quick-connect fitting is properly mated. A slight tug on the fuel supply line will verify this condition. Gasoline is extremely flammable and highly explosive. Inadequate safety precautions could result in death or serious injury. 14. Pull up on chrome sleeve of quick-connect fitting and insert neck of fuel supply line fitting. While pushing up on bottom of fuel supply line fitting, pull down on chrome sleeve until it “clicks” into the locked position. Tug on fuel supply line to be sure that it will not come free. 15. Install right side cover and saddlebag. 5-52 2004 Touring: Engine Management (EFI)

HOME Test 5.15 FUEL PRESSURE TEST Install fuel pressure gauge. See TESTING under Section 5.15 FUEL PRESSURE TEST. Start and idle engine. Open and close throttle to change engine speed. Does fuel pressure remain steady at 55-62 PSI (380-425 kPa)? YES Steady pressure. NO Low pressure. NO High pressure. No trouble found. Review symptoms. 2 Check for restricted fuel filter or pump inlet screen. Are filter and screen OK? 1 Inspect check valve fitting assembly and fuel tank. If OK, replace faulty fuel pressure regulator. YES NO Check for restricted pressure line or flex hose between tank and test gauge. If lines are OK, check for: Replace filter or clean pump inlet screen. Retest. Faulty fuel pump. Restricted check valve fitting assembly. 3 1 Leak inside tank caused by faulty coupling hose or connection, such as hose at filter or pump. Faulty fuel pressure regulator. 2004 Touring: Engine Management (EFI) 5-53

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