BASIC SERVICE PROCEDURE — Fuel Pressure Regulator Check; Injector Removal and Installation
EF & EC-7025prose procedureFuel Pressure Regulator Check
CG10, CGA3
Fuel Pressure Regulator Check
- 1Stop engine and disconnect fuel pressure regulator vacuum hose from intake manifold.
- 2Plug intake manifold with a rubber cap.
- 3Connect variable vacuum source to fuel pressure regulator.
SEF718B - 4Start engine and read indication of fuel pressure gauge as vacuum is changed.
CAUTION
Fuel pressure should decrease as vacuum increases. If results are unsatisfactory, replace fuel pressure regulator.
Injector
REMOVAL AND INSTALLATION
Injector removal and installation
- 1Release fuel pressure to zero.
- 2Remove fuel tube assemblies in numerical sequence as shown in the Figure at left.
SEF644Z - 3Expand and remove clips securing fuel injectors.
- 4Extract fuel injectors straight from fuel tubes. - Be careful not to damage injector nozzles during removal. - Do not bump or drop fuel injectors.Be careful not to damage injector nozzles during removal.Do not bump or drop fuel injectors.
- 5Install fuel injectors. Carefully install O-rings, including the one used with the pressure regulator. - Use bare hands to install O-rings. Do not wear gloves. - Apply smear of engine oil to O-rings before installation. - Make sure that O-rings and other parts are clean and free from foreign particles. - Be careful not to damage O-rings with service tools or finger nails. Do not expand or twist O-rings. If stretched, do not insert them into fuel tubes immediately after stretching. - Always insert O-rings straight into fuel tubes. Do not tilt or rotate them during installation.Use bare hands to install O-rings. Do not wear gloves.Apply smear of engine oil to O-rings before installation.Make sure that O-rings and other parts are clean and free from foreign particles.Be careful not to damage O-rings with service tools or finger nails.Always insert O-rings straight into fuel tubes.
SEF647Z - 6Position clips in grooves on fuel injectors. - Make sure that protrusions of fuel injectors are aligned with cutouts of clips after installation.Make sure that protrusions of fuel injectors are aligned with cutouts of clips after installation.