So i drove for a little bit and the check engine light remained off for awhile but then one time after turning the car off and turning it back on about 45 minutes after the check engine light was back on with the same code.Hi,
Can do the rest on a better day. Answer to your question- No, pressure is not too low at 39 PSI. It’s actually pretty optimal. It’s the higher side that is unusual, 50 psi. It’s within range, just a bit excessive jumping to that without slamming the GO pedal to the floor at escalating rpm’s so the pressure keeps up behind the fuel volume being used.
@ Idle, range is between 30-50 calculating various scenario’s.
Since you have a returnless system, the pump controls the fuel pressure to maintain pressure >30lbs while running through hard acceleration. You have an FPRS on the front of your drivers side fuel rail, this is to communicate actual fuel pressure in the loop It has a vacuum line & plug attached to it.
Check the connections for both.
I’m interested in what your pump’s PRIME pressure is, the fuel system pressurizing the lines on a cold start.
That will be great information. This issue started occurring suddenly, correct? Wasn’t like this when purchased?
Acceleration have any flat spots, or interruptions while driving normally, or hard?
The car runs so much better now and has started without any issues since the spark plug change.
Is it possible there is still something wrong or maybe it’s being triggered for some odd reason? Should I return the car to stock now to see if that fixes anything?