Urrea 2338 Manual De Usuario página 5

GUIDE BOSCH CIS
Basic Instructions for Testing Bosch CIS
Four pressure tests can be made with this
tester:
A. Cold control pressure –engine cold, valve
open.
B. Warm control pressure –engine warm,
valve open.
C. Primary pressure –engine cold or warm,
valve closed (closed valve eliminates control
pressure).
D. Rest pressure –engine warm, valve open.
Please consult the vehicle service manual,
a Mitchell Fuel Injection manual or Robert
Bosch Service Guide regarding pressure test
results.
To test:
1. For test "A" (above), the engine should
be cold, standing several hours or overnight.
2. Relieve fuel system pressure.
3. Make sure fuel filter is not clogged.
Replace if doubtful.
4. Clean dirt off the fuel distributor top.
5. Connect the tester between the fuel
distributor and the
regulator (diagram A). The hose without
the control valve should be connected to
the center of the fuel distributor.
The hose with the valve should be
control pressure
connected to the hose removed from the
fuel distributor or connected directly to the
control pressure regulator.
In some instances, the adapters may have to
be piggy-backed in order to get the right
combination of threads to connect (see
diagram B).
CAUTION: Avoid damage to o-rings by
hand-tightening any adapters that contain
o-rings.
6. Reactivate fuel pump, start the engine
and check for leaks.
7. When the tester is connected, bleed the
air from the system.
(a.) If your tester has a release valve under the
gauge, wrap a rag over the valve and depress
button until the air is released. Do NOT do
this over a hot engine or manifold.
(b.) If your tester has a bleed-off valve, put
the end of the bleed-off tubing in a fuel
E N G L I S H
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