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Idiomas disponibles
USING THE AUTOMOTIVE VACUUM & PRESSURE TEST KIT TO TEST FUEL SYSTEM
There are several uses for the vacuum/pressure tester regarding the fuel system. These range from
bleeding the fuel system to testing pressure regulators. By using the appropriate connector from the
selection included in the kit, most vacuum pipes can be interrupted.
When bleeding diesel fuel systems, it is recommended that the reservoir pot is used. This creates a
vacuum in the pot and the diesel fuel is drawn in. This may need to be completed a few times before
the procedure is complete. Connect the pot and gauge between the fuel filter and distribution pump.
FAULT
NORMAL ENGINE
WORN VALVE GUIDES
BURNED OR LEAKING VALVES
STICKING VALVES
PISTON RING LEAKS
BLOWN CYLINDER HEAD
GASKETS
INCORRECT IDLE AIR/FUEL
MIXTURE
LATE IGNITION / VALVE TIMING
USING THE AUTOMOTIVE VACUUM & PRESSURE TEST KIT TO TEST AIR
CONDITIONING AND HEATING SYSTEMS
Using the connectors provided, it is possible to interrupt the vacuum system of the heating / air con
system to enable safe and precise operation of the heater direction flaps in the heater box. Remove the
main vacuum supply to the unit and replace with the vacuum / pressure tester. Select vacuum mode
and apply a small amount of vacuum while observing operation and gauge pressure.
SW-Stahl und Werkzeugvertriebs GmbH
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INDICATOR
(Comparative to normal engine at idle 16-22inHg
Reads steady at between 16inHg and 22inHg
Reads lower than normal and fluctuated rapidly in a
range of approximately 3inHg. As the rpm increased,
the reading will become increasingly steady
Will fluctuate between low and normal at regular
intervals
Will demonstrate rapid and intermittent drop in vacuum
pressure
Will be low constant and demonstrate a rapid leap
following a quick throttle opening and closing. The
vacuum reading at idle will be low but steady at
approximately 12inHg to 16inHg. Increase the engine
speed to 2000 rpm and close the throttle suddenly and
the vacuum should increase 2inHg to 5inHg above its
low steady reading. A smaller reading may indicate
faulty rings
At idle the reading will fluctuate between a normal and
a low reading. The vacuum will drop approximately
10inHg from the normal reading and return to normal
each time the defective cylinder or cylinders reach
lining point
Rich mixture will read as a slow up and down
movement over a range of around 4inHg-5inHg. Lean
mixture appears as a drop over the same range
Steady low vacuum reading at idle indicates late
ignition or valve timing or a uniformly close setting of
the valve lash
Tel. +49 (0) 2191 / 46438-0
F
ax +49 (0) 2191 / 46438-40
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