Engine Vacuum Check - Suzuki 2000 Grand Vitara SQ625 Service Manual

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.
2) Stop engine and disconnect vacuum hoses from fuel pressure
2. EVAP canister
purge valve
regulator valve (3) or intake collector (1) to EVAP canister purge
valve (2).
3) Connect special tools (Vacuum gauge and hose joint) and 3way
joint between vacuum hose and valve.
Special Tool
(A): 09915-67310
(B): 09918-08210
SUZUKI GENUINE PARTS
(C): Hose 09343-03087
(D): 3way joint 09367-04002
4) Start engine and run engine at specified idle speed, and read
vacuum gauge. Vacuum should be within specification.
Vacuum specification: 450 – 600 mm Hg
(sea level)
5) After checking, remove vacuum gauge and hose joint.
6) Connect vacuum hoses to fuel pressure regulator valve.
ENGINE MECHANICAL (H25 ENGINE) 6A2-5
(17.7 – 23.7 in.Hg)
at specified idle speed