The fuel rail is the pipe that supplies high pressure fuel to the injectors. No experience with the D3-4, but I know on the wife's car, the sensor reads the pressure available in the line. If this pressure appears to drop, the brain box can throw up all sorts of messages. On her car, a message about that usually means a dirty fuel filter, but according to most mechanics, it means replacing the sensor ($250), and four hours later the message comes back!
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You have the right to remain silent. Anything you say will be misquoted, then used against you.
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1999 Disco TD5 ("Bluey")
1996 Disco 300 TDi ("Slo-Mo")
1995 P38A 4.6 HSE ("The Limo")
1966 No 5 Trailer (ARN 173 075) soon to be camper
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