Skylark V6-3100 3.1L VIN M SFI (1996)
Pre-measured containers eliminate the need to measure the amount of GM Top-Engine Cleaner being added to the J 35800-A, injector cleaning tool. In
Canada, use P/N 992872. It will be necessary to measure and dispense Top Engine Cleaner into the J 35800-A, injector cleaning tool.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles serviced under warranty, use the table.
Disclaimer
Injector Balance Test
The following tools or their equivalent are required:
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J 39021 Fuel Injector Coil/Balance Tester
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J 39021-210 Fuel Injector Selector Adapter Box
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J 39021-306 Fuel Injector Test Harness
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J 35800-A Fuel Injector Cleaner
^
Two pre-measured GM Top-Engine Cleaner Containers, 24 ml (0.812 oz) each, P/N 12346535, U.S. USAGE ONLY. In Canada, use P/N 992872,
443.6 ml (15 oz) bottle. It will be necessary to measure and dispense 48 ml (1.6 oz) of Top Engine-Cleaner into the J 35800-A, injector cleaning
tool. See Injector Cleaning Procedure below for further information.
1.
Disconnect the 10-pin fuel rail electrical connector. Refer to the appropriate Service Information Manual for connector location.
2.
Connect the J 39021, fuel injector coil/balance tester, to the J 39021-210, fuel injector selector adapter box.
3.
Connect the J 39021-306, fuel injector test harness, to the engine 10-pin fuel rail electrical connector. This allows you to test the fuel injectors
without removing the upper intake plenum.
4.
Using the injector tester, J 39021, perform an injector balance test. Use the J 39021-210 to select each individual injector. Record the pressure
drop of each injector.
5.
Subtract the lowest pressure drop, leanest injector, from the highest pressure drop, richest injector. If there is more than a 20 kPa (3 psi) difference
between the lowest and highest pressure drop, then the fuel injectors may be the cause of the driveability symptom. See the example tables below
to determine if cleaning is appropriate.
