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High fuel pressure 99 SLS


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I went looking for causes of a startup rough running. I have discovered that when the pump is running the fuel pressure is 54 PSI. When it stops the pressure drops to 45 PSI. With the engine idling it retains the higher presure (vacuum line unplugged) I have removed the regulator and the filter is clean. The regulator appears to be working correctly but being overpowered by flow. Any suggestions on places to look for the restriction would be appreciated.



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