Fuel Injectors
- Remove injectors but leave hoses connected. Place injectors in individual measuring containers. Operate fuel pump to build up pressure, then turn pump off.
- Lift air flow sensor plate half-way to operate injectors until one container has filled to 3.4 oz. (100 cc). Other container volume should not vary more than 10-20°.
- If one injector is outside specifications, swap hoses from it and one good injector at fuel distributor and retest. If same container is low, injector is faulty. If other container is low, fuel distributor must be replaced.
- Relieve system pressure and remove pressure testing gauge. Turn on pump to build up pressure. Injectors may leak slightly, but no drops should form in less than 15 seconds. If drops form, check air flow sensor plate height, sticking fuel distributor plunger, or injector opening pressure.
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- Remove injectors from vehicle and use injector tester to determine opening pressure. Check specifications in "Pressure Testing" chart and replace injectors if faulty.