Engine Vacuum Check - Suzuki 2000 Grand Vitara SQ625 Service Manual

6A4-6 ENGINE MECHANICAL (J20 ENGINE)

ENGINE VACUUM CHECK

The engine vacuum that develops in the intake line is a good indica-
tor of the condition of the engine. The vacuum checking procedure
is as follows:
1) Warm up engine to normal operating temperature and make
sure that engine idle speed is within specification.
NOTE:
After warming up engine, place transmission gear shift le-
ver in "Neutral" (shift selector lever to "P" range for A/T
model), and set parking brake and block drive wheels.
2) Stop engine and disconnect vacuum hose from intake manifold.
3) Connect special tools (vacuum gauge and hose joint) to vacuum
hose and intake manifold.
Special Tool
(A): 09915-67310
(B): 09918-08210
SUZUKI GENUINE PARTS
(C): Hose 09343-03087
(D): 3-way joint 09367-04002
4) Start engine and run engine at specified idle speed (see section
6E1), and read vacuum gauge. Vacuum should be within specifi-
cation.
Vacuum specification: 52.6 – 65.8 kPa
(at sea level)
5) After checking, remove vacuum gauge and hose joint.
6) Connect vacuum hose to intake manifold.
(40 – 50 cm Hg, 15.7 – 19.7 in Hg)
at specified idle speed