Check
Check whether the fuel injector is blocked; clean it with special equipment (such as ultrasonic)
or special detergent;
Check whether there is fuel leakage from the fuel injector; if yes, replace it with a new fuel
injector of the same part number;
Check whether the electromagnetic oil of the fuel injector is damaged: measure resistance of
the electromagnetic coil with a voltmeter; if it displays about 12ohm, the electromagnetic coil works
normally; if it displays infinite, there is open circuit and the fuel injector has to be replaced.
Check whether the o-rings of the fuel injector is damaged or hardened; if yes, replace the o-rings.
Instructions:
The fuel injector is designed with a filter inside which is irreparable. It is only used for filtering
accumulated impurities in the fuel pipe between the fuel filter and the fuel injector. Impurities
will cause failure such as bonding, flow deviation and leakage. Therefore, the fuel filter is very
important.
Replace it only with a new fuel injector of the same part number.
17.2.2.3
O-ring
O-ring for
connecting the
fuel rail or the
fuel injector cap.
O-ring for
connecting the
end of the air intake
pipe.
O-ring shown in the 12 is able to ensure that there is no leakage in the fuel injector when
working at between -40°F and 302°F. It also resists corrosion from all kinds of fuel additives
(such as ethanol). The current o-ring design is shown below. If any DELPHI fuel injector is not
consistent with following data, please contact DELPHI.
O-ring for connecting the fuel rail or the fuel injector cap
·Dimension:
·Inner diameter: 6.35mm
·Outer diameter: 14.85mm
·Section thickness: 4.25mm
O-ring for connecting the end of the air intake
pipe
·Dimension:
·Inner diameter: 9.61mm
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