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Fuel pressure


neil brown

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As I have a spa digital gauge fitted monitoring fuel pressure

 

have noticed a few times that at 1 bar of boost that fuel pressure only goes to 3.6 bar now and again and when letting off throttle fuel pressure drops to 1.6 bar 

 

the reg is 1:1 type but afr ratio is good at 11.3:1

 

do I have a fuel pump issue or reg issue or could it be the sensor for gauge playing up 

 

 

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