2011 gmc 6.2 /4l80e help

[edcmat-l1]

"Every time I look at it it's XX psi"....

[laurieandmike]

Post the tune file.

Put a fuel pressure gauge on it. One you can tape to the windshield so you can watch it while you drive.

will have a fuel pressure gauge hooked to so i can view while driving
will scan and video the fuel pressure at the same time

[laurieandmike]

cant seem to add a video

[laurieandmike]

What in tankkpump can I use
The gauge shows 60 at idle but goes to 20 under load
Using a corvette fuel regulator/filter
And pressure do not increase when return is blocked off

[Alvin]

Yeah that is a problem. It's likely just a bad pump.

[edcmat-l1]

fuel pressure stays at about 60psi

That's what everyone says and around here it's code for 'I haven't really checked it, I'm assuming'. Your MAF table is already doubled. Granted they do need recalibrating when you move them like in a swap vehicle, but with it being doubled I'd suspect low fuel pressure.

What in tankkpump can I use
The gauge shows 60 at idle but goes to 20 under load
Using a corvette fuel regulator/filter
And pressure do not increase when return is blocked off

BOOM Called it days ago.....

I could tell by the MAF table it had been "tuned" with low fuel pressure.

[laurieandmike]

BOOM Called it days ago.....

I could tell by the MAF table it had been "tuned" with low fuel pressure.

dadnewpump.hpl

[laurieandmike]

works better but still issues

[gtstorey]

Any tuning done with a bad fuel pump will have to be redone. Or if none has been done, time to tune it.

[Alvin]

It's very rich now but a lot could be fixed just setting PE to something more reasonable.

[laurieandmike]

has everyone can see i am very new to this
where abouts would i start lol
only thing done to this has of now is vvt zeroed out
dod disabled
with the new walbro intank pump the gauge off the rail is showing 68 ish pounds and dont seem to drop out undr load like it used too
corvette style fpr with return
thanks everyone for the help so far

[gtstorey]

Showing 68 psi or 58 psi?

[laurieandmike]

befor i changed the pump it would show 58psi and drop out to 20ish under load
now gauge shows closer to 68psi and drops to say 65
thats using the corvette filter/regulator/return line setup
its located close to the tank
i am getting the pressure readings from the port on the fuel rail
injectors are stock

[gtstorey]

Corvette Regulator/Filter should read 58 psi. Either your pump is overloading the regulator or a crappy regulator or both. Both show up fairly often on here.

[laurieandmike]

i am sure the pump is over powering the regulator now
what would you guys suggest for a decent regulator?
thanks

[laurieandmike]

Gss341 walbro is the pump