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Check injection valves (injectors)
Injection valves inject fuel intermittently, t. E. In one revolution of the crankshaft is injected half required for one intake stroke fuel. When this valve injects fuel in a conical shape, and after spraying tightly closed. Defective valves cause a continued injection of the engine after the ignition is switched off and the engine outages. Verifying |  | - Leave the engine idling.
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- Check each valve on the engine is running with a stethoscope, he snaps. These clicks caused by opening and closing the valve.
- If the stethoscope is not, you can check the operation of the valve with a screwdriver or your finger.
- If the noise of the work is missing or has an unusual character, check the plug connection, the signal from the control unit (carried out in the workshop) or resistance.
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Check resistance | - Switch off the ignition.
- Disable plugs injection valves.
- Ohmmeter measure resistance of all connectors in the fuel injection valves.
Required value: (all engines) 12-16 ohms.
- If the value is not correct, the injection valve should be replaced.
 | - To check the tightness and jet injection valve need special tools, are available in retail shops MAZDA.
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