Regulator issues
Hi
I'm have a regulator question.
Where are the hose from regulator going to?
How are the regulator working?
What could cause this problem below???
Another issue is that when pumps runs 5sec fuel pressure gauge shows 58psi but after starting gauge shows 52psi at idle. Rev engine the throttle pressure drops to 48-50psi. When rpm falls pressure shortly goes up to 53-54psi and then back to 52psi again.
I have checked all wiring and voltage at pump and this seems to be okay.
All kind of help is appreciated
Regulator is vacuum-controlled, when vacuum is high the pressure would drop, if low it will regulate to the setpoint 58PSI
Mine regulate 52@idle up towards 58 when vacuum is low.
If you plug the hose, you should have constant 58PSI, else you have flow issues, or a bad regulator. (regulator seems ok, if you see 58Psi@ intital key on)
My guess is a collapsed hose or a tired pump, or maybe you setup pump PWM?
Quote from ThomsenDK on May 5, 2019, 7:14 amRegulator is vacuum-controlled, when vacuum is high the pressure would drop, if low it will regulate to the setpoint 58PSI
Mine regulate 52@idle up towards 58 when vacuum is low.
If you plug the hose, you should have constant 58PSI, else you have flow issues, or a bad regulator. (regulator seems ok, if you see 58Psi@ intital key on)
My guess is a collapsed hose or a tired pump, or maybe you setup pump PWM?
Hi ThomsenDK
Thanks for the information, I'll try to delete the hose, because Aeromotive stealth in-tank pump is new, tank is new, all lines ect are new, so I don't think the failure is this, but we never know.
I my world it sounds plausible with the regulator, I'll try your advice when I get time and then reply my result.
There is no difference when setting PWN up at all parameters, I've tried that earlier, but to be 1000% sure I'll check and do it again before continuing to regulator.
The easiest way to check pump vs PWM is to give it full voltage, and making sure there is no power loss due to wire restrictions.
As soon as you remove vacuum from the regulator, you should see same values no matter what you do to the engine, if not fuel delivery line is the problem.
Could be pump, low voltage, bend lines etc.
Quote from ThomsenDK on May 6, 2019, 3:09 amThe easiest way to check pump vs PWM is to give it full voltage, and making sure there is no power loss due to wire restrictions.
As soon as you remove vacuum from the regulator, you should see same values no matter what you do to the engine, if not fuel delivery line is the problem.
Could be pump, low voltage, bend lines etc.
Hi ThomsenDK
I've checked all fuel lines and no collapsed hoses, wiring and voltage is good also BUT.
When I removed the vacuum hose from regulator, there was fuel in the hose, so with the hose removed and with open or closed vacuum port at regulator fuel pressure is 58-59psi but as soon I put the vacuum hose back on pressure drops to 52psi!!
How to continue?
If fuel in the vacuum line, there is a possibility you have a leaking regulator. Remove and inspect.
I have replacement regulators listed in the Parts and Accessories list. You need the 58 psi or 4 bar regulator.
Quote from Austin DeHaas on May 12, 2019, 7:33 amIf fuel in the vacuum line, there is a possibility you have a leaking regulator. Remove and inspect.
I have replacement regulators listed in the Parts and Accessories list. You need the 58 psi or 4 bar regulator.
Hi Austin
There was a few drops and a new regulator is purchased.
But can a leaking regulator cause this kind of problem I'm dealing with?
I would start there.
Quote from Austin DeHaas on May 12, 2019, 7:33 amIf fuel in the vacuum line, there is a possibility you have a leaking regulator. Remove and inspect.
I have replacement regulators listed in the Parts and Accessories list. You need the 58 psi or 4 bar regulator.
Checked the regulator, small o-ring was damaged, buy a new regulator still having problems with low pressure, so ended up with removing the hose between regulator and vacuum, blinding the stud on regulator and now pressure are at 58psi all the time.
Is that an acceptable solution?
Could that solution cause other problems?
That will work just fine.