jaguar 1993 check engine code ff-23

1993 JAGUAR XJS
52,000 MILES • 6 CYL • AWD • AUTOMATIC
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JUAN SANTIAGO
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check engine code ff-23 and the car has gas oider in the car at times.
Feb 18, 2011 at 8:48 PM
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ERNEST CLARK
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That is a code for a faulty oxygen sensor reading by the computer. It doesn't always mean the O2 sensor is bad however, it can be in the wiring/ground/connector. You'll have to test the voltage from the sensor. It should be between 1-4 volts with the engine warmed up.

The fuel smell could be from a leaking fuel pressure regulator or line. You'll need to check that. Fuel pressure could also be too high. It should read: 34-38 psi with engine warmed up at idle. Pull the vacuum hose at the FPR and psi should increase by 7-10 psi.
Feb 18, 2011 at 10:32 PM