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Message: <blockquote data-quote="nyuk98gt" data-source="post: 701765" data-attributes="member: 8810">Re: Camshaft Pos Sensor ProblemMidniteGT:The fuel rail pressure sensor (FRPS) is sometimes a problem with the +99 cars. You are correct that the fuel pressure should be 38 or 39 psig at idle. Fuel filter has been changed regularly? You don't drive around a lot with the fuel gauge on "E", do you? Low level in the tank makes the pump work harder since there is less head (liquid height) "pushing" fuel into the pump suction. I don't know how to check the FRPS but you might try watching the fuel pressure with the FRPS connected and then disconnected. editRe-reading your post I see that the fuel pressure is OK when driving around. This suggests to me that the pump is OK. I would take a look at the FRPS (if the filter is clean, etc.). end of editHTH, Chris</blockquote>