FUEL INJECTION TESTER
Fuel Injection Fuel Pump Pressures –
Consult factory manual or dealer when pos-
sible since pressures may vary from year to
year.
WARNINGS:
1. Do not loosen hose or tting on the car
until you have placed a cloth around it.
Fuel may be under pressure in the
system and could spray out, creating a
re hazard and/or personal injury.
Dispose of cloth properly.
2. It is best to do fuel injection testing while
the engine is cold, so if any fuel is spilled,
it will not catch re on a hot engine.
3. Do not allow any dirt to enter the system
as it might clog fuel injectors.
4. To prevent leaking, use pipe compound or
gasket sealer on the pipe threads of the
gauge where it screws into the tee or hose
assembly. Use sparingly so that it does not
get into the fuel system.
Electronic Bosch L&D
Jetronic, Standard Schrader
INSTRUCTIONS:
All tests are made at idle at the high pressure
side of the fuel pump. This would be the side
toward the fuel rail and injectors. After read-
ing and heeding WARNINGS (above), with
the engine OFF , connect the tester using
appropriate hook-ups A, B, C, or V, (see dia-
gram next page) depending on the car you
have:
A. Typical hook-up with 1/4˝ fuel line.
B. Typical hook-up with 5/16˝ fuel line.
C. Typical hook-up for standard
Schrader-type valve.
V. Special hook-up for Volkswagen.
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