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Cayenne - Possible Fuel Pump issues - Fuel Pressure in Durametric?

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I am having some cold starting issues. My Cayenne often cranks more then I feel is right on start-up. I wanted to test the fuel pressure. However my fuel pressure gauge doesnt have the right adapter. I have a v6 base

I was wondering if you can see the fuel pressure in Durametric? I had gotten the impression that maybe you could based on some threads from others where they were talking about fuel pressure at certain throttle positions. However I dont see fuel pressure as a variable when I hooked my car up last night.  

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2008 v6... my doesnt seem to have the shrader valve that I have seen in others..

I would going to test it at the union in the fuel line.  Same setup as this video at the 45 second mark.  I just need the right adapter. 

It hear the pump priming.  it just cranks too long, one really cold days I sometimes have to try 2-3 times to get it to start.  no fault codes.  Battery was getting near end of life, was not holding voltage very well in cases where I didnt drive it for a week..  It now cranks harder but still have an issue on the colder days
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Is anyone familiar with the valve (item 2/3).     I actually changed the high pressure fuel pump a few days ago hoping that was the cold start problem.  While changing the pump I  didnt see what totally appears to be a pressure valve.  item 2/3 looks like it.   the right two connectors are low pressure but I am thinking that valve might be at high pressure..  

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