general information - Martin Nez

5-24 FUEL SYSTEM AND THROTTLE BODYTHROTTLE VALVE SYNCHRONIZATIONCheck and adjust the throttle valve synchronization among fourcylinders.Step 1• Lift and support the fuel tank. (5-3)• Start up the engine and run it in idling condition for warming up.• Stop the warmed-up engine.• Disconnect the IAP sensor coupler 1 and remove the IAPsensor from the air cleaner box.• Disconnect the vacuum hose 2 from each throttle body.• Connect the vacuum tester hose 3 to each vacuum nipple onthe throttle body.Step 2• Connect a tachometer and start up the engine.• Bring the engine r/min to 1 300 r/min by the throttle stopscrew.• Check the vacuum of the four cylinders and balance the fourthrottle valves with the balance screw 4.Avoid dirt drawn into the throttle body while runningthe engine without air cleaner box cover. Dirt drawninto the engine will damage the internal engine parts.NOTE:* During balancing the throttle valves, always set the enginer/min at 1 300 r/min, using throttle stop screw.* After balancing the four valves, set the idle r/min to 1 300 r/minby the throttle stop screw.* If the above procedures cannot still synchronize the valves,proceed to the next step.