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1993 Buick Roadmaster: fuel injectors without removing..5.7 liter…

Customer Question
Can I clean the fuel...
Can I clean the fuel injectors without removing them from a 1993 Buick Roadmaster 5.7 liter egine?
Submitted: 8 years ago.Category: Car
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Answered in 7 minutes by:
6/29/2010
Auto Mechanic: Tim's Auto Repair, Mechanic replied 8 years ago
Tim's Auto Repair
Category: Car
Satisfied Customers: 16,247
Experience: Have owned a repair shop for 25 yrs.
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hi

not really..to clean these you should remove them..you can do this with a tester/cleaner..but most people don't have this

thanks

 

Fuel Injector Cleaning Procedure

PROCEDURE:

  1. Relieve the system pressure, refer to FUEL SYSTEM PRESSURE RELIEF.
  2. Disconnect the fuel supply line from the inlet of the fuel rail.
  3. Attach the fuel supply line to the return line.
  4. Plug the fuel return fitting at the fuel rail or connect to tester/cleaner depending on configuration.
  5. Connect the fuel supply hose from the tester/cleaner to the fuel supply manifold.
  6. Turn the tester/cleaner "ON." Tester/cleaner should run 10 minutes.
  7. START the engine and check the fuel lines for leakage. If there is any sign of leakage, turn the vehicle and the tester/cleaner "OFF" and repair the location where fuel is leaking. Then return to Step 6.
  8. When the engine speed has stabilized, set the idle speed at 2000 rpm. Run the remainder of the 10 minute cycle to eliminate all the air in the fuel supply hose and fuel rail.
  9. Turn power switch"OFF" and disconnect power lines.
  10. Disconnect cleaner supply hose from the fuel supply manifold.
  11. Connect vehicle fuel lines. START engine and check for leaks. Lubricate O-rings prior to installation and ensure fuel lines are securely connected
Fuel Injector(s) Replacement

 

Fuel Injector Part Number Location
Fuel Injector Removal

CAUTION:

 

  • Each fuel injector is serviced as a complete assembly only.
  • Be sure to replace the injector with an identical part. Different injectors with different flow rates will fit this unit, but are calibrated for different flow rates.
  • Use care in removing the fuel injectors to prevent damage to the electrical connector terminals, the injector filter, and the fuel nozzle. The fuel injector is serviced as a complete assembly only. Also, since the injectors are electrical components, they should not be immersed in any type of liquid solvent or cleaner as damage could occur.

REMOVE OR DISCONNECT

  1. Disconnect electrical connectors to fuel injectors. (Squeeze plastic tabs and pull straight up.)
  1. Remove fuel meter cover assembly. Refer to FUEL METER COVER ASSEMBLY.
  1. With fuel meter cover gasket in place to prevent damage to casting, use a screwdriver and fulcrum to carefully lift out each injector.
  2. Remove lower (small) O-rings from nozzle of injectors and discard.
  3. Remove fuel meter cover gasket and discard.
  4. Remove upper (large) O-rings and steel backup washers from top of fuel injector cavity and discard.

INSPECT

  • Fuel injector filter for evidence of dirt and contamination. If present, check for presence of dirt in fuel lines and fuel tank. If dirt is present: Refer to MAINTENANCE PROCEDURES/FUEL SYSTEM CLEANING.

 

Fuel Injector Installation

INSTALL OR DISCONNECT

 

  1. Lubricate new lower (small) O-rings with automatic transmission fluid and push on nozzle end of injector until it presses against injector fuel filter
  2. Install steel injector back up washer in counterbore of fuel meter body.
  3. Lubricate new upper (large) O-rings with automatic transmission fluid and install directly over the back up washer. Be sure the O-ring is seated properly and is flush with top of fuel meter body surface. NOTE: Backup washers and O-rings must be installed before injectors, or improper seating of large O-rings could cause fuel to leak.
  4. Install injector, aligning raised lug on each injector base with notch in fuel meter body cavity. Push down on injector until it is fully seated in the fuel meter body. (Electrical terminals of the injector should be parallel with throttle shaft).
  5. Install fuel meter cover gasket.
  6. Install fuel meter cover.
  7. Reconnect electrical connectors to fuel injectors.
  8. With engine OFF and ignition ON, check for fuel leaks.
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Customer reply replied 8 years ago
I would like to clean injectors without disconnecting either of them. If I do as you suggest, I should replace the injectors. I am concerned if I do as you suggest, I could cause damage that would require a mechanic or at least a person with more confidence than me.
Auto Mechanic: Tim's Auto Repair, Mechanic replied 8 years ago

well

no doubt,you don't need to do this if you are not familiar with the procedure..so,your only other option may be to replace them

thanks

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Customer reply replied 8 years ago
I am sincerely XXXXX XXXXX me accepting your answer. Honestly, there must be a way to attempt to clean the injectors without disconnecting everything. If not tell me that. Under the circustances, I respectfully XXXXX XXXXX acept your answer. Please look int this further. You did not help me.
Auto Mechanic: Tim's Auto Repair, Mechanic replied 8 years ago
sorry..there is no easy button on these.....i will opt out..maybe one of the other guys may be able to help you
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Auto Mechanic: Tim's Auto Repair, Mechanic replied 8 years ago
and,for the record i did answer the question..the answer is no!
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