Kent-Moore J-44175-A Manuel D'instructions page 9

Fuel Quality - Sediment
Sediment will be visible in a "settled" fuel sample.
Sediment may collect at the bottom of the fuel tank,
near a single fuel injector, or at the lowest point in
the fuel rail and cause a misfire in that cylinder.
If sediment is present it will generally be located
in the bottom of the fuel tank. It is possible that
sediment can also accumulate in the fuel rail.
Sediment from the fuel will collect at the bottom
of the beaker if a fuel sample is allowed to settle
for a few minutes.
Fuel Quality - Excessive Ethanol
Excessive concentrations of ethanol may cause
driveability conditions. For E85, ethanol percentage
is normally between 70% and 85%. Some states
that have extremely cold winter temperatures
allow as low as 60% during the winter. When
using the J-44175-A fuel composition tester,
measured ethanol values between 60% and 91%
(the tester's AC frequency signal between 110 Hz
and 141 Hz) are acceptable for E85. Measured ethanol
limits are slightly larger than ASTM specifications
due to the combination of equipment tolerance,
the effect of ambient humidity and temperature on
measurement accuracy, and seasonal changes in
ethanol content.
IMPORTANT: The accuracy and reliability of this
entire procedure depends on preventing the fuel
sample or the tester's fuel sampling cell from
becoming contaminated.
Clean the 100mL beaker with a clean, dry paper
towel before taking a fuel sample. DO NOT USE
compressed "shop air" to blow out the beaker.
Compressed shop air often contains water or solid
contaminants. Contaminants of ethanol-blended
fuels include water, methanol, and salts. Be careful
not to allow fingerprints, sweat, water or any other
11