Fuel pump pressure questions. Is this normal?

[FastHatch]

So I just got my corksport DP and TMIC installed and reflashed ECU to corksport stage2 map. I have AT internals. Fuel pressure sits between 380-420 at idle. if AC is on it will idle 780-810psi thought that was weird. WOT is between 1850-2020. One of the things I was really wondering about was when I let off the gas after WOT pressure will drop to 1100-1300 and sit there till I tap the gas again and then drops between 500-800. Searched the forums for anyhthing on this. Couldnt find it.

[SoAgg159]

you're fine

[FastHatch]

Originally Posted by SoAgg159 you're fine

Awesome. That's what I like to hear.

[12blkms3]

Hey just wondering fellas, just installed cobb sr/ap no internals yet, coming soon tho.. I'm not home so I just have my phone to search, I hav a 2012 pu, just wondering what idol/normal driving psi my fp needs to be at to run safe... I know under wot nothing under 1600...
Thx in advance

[anavrinIV]

you basically have the right info. part throttle is much lower load on the motor and the fp internals don't have to work as hard. the biggest thing is to make sure they hold pressure at WOT, and make sure you're about 430 psi at idle.

[12blkms3]

Havnt gone wot yet but idle is around 430

[anavrinIV]

as long as everything else looks good, it's time to go for it. Unfortunately you won't know if it holds until you try it. if you give it a decent blip and see the pressure surge then chances are you'll be fine. but it's time to test it. take a couple logs and see how you fare.

[12blkms3]

Originally Posted by anavrinIV as long as everything else looks good, it's time to go for it. Unfortunately you won't know if it holds until you try it. if you give it a decent blip and see the pressure surge then chances are you'll be fine. but it's time to test it. take a couple logs and see how you fare.

Didn't get a chance to do any logs but did a couple of pulls on the way home, didn't see it go under 1650psi at wot, I noticed after id let off it would shoot up to 1750psi and stay there for a few seconds, normal?

[jseams]

Originally Posted by 12blkms3 Didn't get a chance to do any logs but did a couple of pulls on the way home, didn't see it go under 1650psi at wot, I noticed after id let off it would shoot up to 1750psi and stay there for a few seconds, normal?

Yes. Completely normal...

Do some logs though - sometimes it only goes below 1600 for a few cells and it's sometimes hard to notice that on the AP if you are just monitoring it manualy.

[2k4_8]

Not to be a dick, but how can people not understand that the injectors are closed? Push on the clutch and its the same thing, pressure drops to maintain idle. If you keep decelerating it'll climb as the fuel heats up. All completely normal....