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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: My Jag
Must the fuel tank be empty to check this condition, or is there some way to cut off fuel flow to the sump so that it does not overflow? Aaron '85 XJ-S >---------- >From: Jan Wikström[SMTP:104707.3644@CompuServe.COM] >Sent: Monday, February 17, 1997 12:26 PM >To: Jag-lovers >Subject: My Jag > >Message text written by INTERNET:OTerry1526@aol.com >>I have an 86 xjs, I have recently started hearing a high pitched whine >after >running the car for a while. The noise come from the trunk. I suspect it >the >fuel enjection making the noise.< > >One promintent possibility is that the suction strainer in the tank is >blocked with crud and the pump, because it's operating under partial >vacuum, is cavitating. > >Cavitation: Vapour bubbles form in the fuel as the pressure on the suction >side drops below where its present temperature is the boiling temperature, >and when the bubbles collapse, which causes the noise, the sonic shock >waves cause pitting of the pump parts > >It can't do any harm to check and clean the suction strainer, and it should >be done as quickly as possible IF this is the problem - a cavitating pump >can be damaged by erosion quite quickly. > >-Jan > Follow-Ups:
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