Re: Grand Cherokee CRD Ltd 2004/2685cc/Auto Archived Message
Posted by Michael Whitworth on June 21, 2008, 7:13 am, in reply to "Grand Cherokee CRD Ltd 2004/2685cc/Auto "
Hi John, I find that excessive high pressure will give lots of knock, have you scoped the rail pressure sensor against the fuel pressure reg to see if ecu is trying to reduce pressure but not able to? If pressure is too high, check electronic pressure reg isn't sticking. If fault is due to lack of pressure, have you checked injector leak off? Any sign of filings in fuel/fuel filter? Remove leak off pipe off mechanical reg on rail to see if it is losing pressure through there? HTH Mike
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