Engine Vacuum Check

The engine vacuum that develops in the intake line is a good indicator 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 lever in "Neutral" (shift selector lever to "P" range for A/T model), and set parking brake and block drive wheels.
2. Stop engine and remove engine cover referring to ENGINE COVER REMOVAL AND INSTALLATION .
3. Disconnect vacuum hose between vacuum pipe (2) and intake manifold (1) from vacuum pipe.
4. Connect special tools (vacuum gauge and hose joint) to vacuum hose of intake manifold side.

   Special Tool 

   1. 09915-67311 
   2. 09918-08210 
   3. 09355-35754-600 Hose, SUZUKI GENUINE PARTS 
   4. 09367-04002 3-way joint, SUZUKI GENUINE PARTS 
      Fig 1: Connecting Vacuum Gauge And Hose Joint

      Courtesy of SUZUKI OF AMERICA CORP.
5. Start engine and run engine at specified idle speed (Refer to IDLE SPEED / IDLE AIR CONTROL (IAC) DUTY INSPECTION ), and read vacuum gauge. Vacuum should be within specification.

   Vacuum specification 

   52.6 - 65.8 kPa (40 - 50 cmHg, 15.7 - 19.7 in.Hg) at specified idle speed 

6. After checking, remove special tools.
7. Connect vacuum hose to vacuum pipe.
8. Install engine cover referring to ENGINE COVER REMOVAL AND INSTALLATION .