Appendix Two: Fuel Contamination Concerns, Or Red Led On - Kent-Moore J-44175-A Manuel D'instructions

Appendix Two: Fuel contamination concerns, or
red LED on.
J-44175-A frequency measures above 160 Hz,
and/or the red LED is on. The Digital Multi Meter
will display a frequency above 160 Hz when
contaminated fuel is in the tester's fuel test ports.
The red LED may also be on. If you see frequency
readings above 160 or the red LED is on, please
follow these steps:
(1) Discard the fuel sample that is in the tester
according to all applicable federal, state, and local
requirements.
IMPORTANT: Be careful not to allow fingerprints,
sweat, water or any other outside debris to
contaminate the fuel sample, acetone sample,
beaker, tester or fuel gage as this will cause an
error in the test result, leading to a misdiagnosis.
(2) Fill the Fuel Composition Tester's test ports
with pure acetone to flush out any potential
contaminants.
(3) Drain the acetone completely from the tester.
(4) Turn the Fuel Tester upside down on a flat
surface, such as a workbench, for at least five
minutes. After checking to make sure the sensing
cell is dry, continue with step 5.
(5) Re-verify the tester. See Tester Verification on
page 8. After tester is re-verified, test a different
fuel sample from the vehicle's fuel rail. If the
frequency is again above 160 Hz or the red LED
is again on, the fuel being tested is contaminated.
Use the General Motors "Fuel System Cleaning"
service procedures, and replace the fuel. Fuel
should be disposed of in accordance with all
applicable federal, state and local requirements.
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