Fuel Injectors, Checking

Checking Fuel Injectors

CAUTION: Do not disconnect terminal 1 at ignition coil when operating starter

Checking Spray pattern

- Pull out fuel injectors in pairs but leave electrical plugs and fuel lines connected
- Disconnect electrical plugs at fuel injectors which are still installed (second pair)

WARNING: Fire hazard Do not smoke or have anything in area that can ignite fuel





- Hold injectors in jar or pan
- Operate starter briefly
Spray pattern must be an even, cone shaped spray
- Reinstall fuel injectors with new sealing rings (1)

Leak Checking Injectors

- Pull off electrical plugs at fuel injectors
- Pull out injectors in pairs but leave connected to fuel ring line
- Turn ignition ON for about 5 seconds (fuel pump operates briefly)
- Check that no more than 2 drops leak from each injector in one minute

Checking Voltage Supply

CAUTION: To prevent damage to control unit, do not short-circuit connector contacts





- Pull off all electrical plugs from fuel injectors
- Connect test light to one plug contact (arrow)
- Operate starter
Test light must flicker

If test light does not blink:
- Check relays
- Check impulse output of Hall control unit terminal 7
- Check all ground connections at cylinder head