Funky Rail pressure readings

[JasonCzerak]

So, approaching 100mph, boost 40-something, Rail 20,000. Note the Low pressure fuel near Zero. I let off and notice the rail pressure gauge reading 3,000 (or less). it's stays there until I give things 1/2 throttle and comes right back up.



Would this be a Lift pump issue? or is the ECM actually shutting down the injectors for this time period? Relief valve letting fuel by?

 

[WUnderwood]

maybe the rail pressure is off?

I have read that some people's rail gauge is either broken or way off

hope this helps

 

[JasonCzerak]

maybe the rail pressure is off?



I have read that some people's rail gauge is either broken or way off



hope this helps

I think mine is off just a few points +-, never more or less. after I do a quick reset (key to start position)