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+--- Thread: What pressure does the LP pump run at (/showthread.php?tid=35731)
What pressure does the LP pump run at - bashbarnard - 18-03-2017
So does anyone know this? Or anyone know when the ecu will cut in limp mode. Trying to work a few things out and cant find any data on it
RE: What pressure does the LP pump run at - madmadmax - 18-03-2017
the low fuel pressure is triggerd by the hp pump but the lift pump runs at 37psi i think
RE: What pressure does the LP pump run at - Ruan - 18-03-2017
The lift pump is regulated to 1.25bar within the fuel filter housing.
The ECU has no clue over the low pressure circuit, however if the low pressure circuit starts starving/dropping pressure, the HP pump will be starved also, which means it'll fail to make pressure. As stock there is a maximum ±250bar deviation allowed before a fault code is set.
RE: What pressure does the LP pump run at - bashbarnard - 18-03-2017
Well ill have to see what pumps i can find that will make my life easier. Thanks for the info guys
RE: What pressure does the LP pump run at - toseland - 20-03-2017
what do you need to do? higher pressure lift? more flow? might be able to point you in a direction mate.
What pressure does the LP pump run at - bashbarnard - 20-03-2017
Just need to know what the standard ine runs ao i can measure it against another one i have
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RE: What pressure does the LP pump run at - Poodle - 20-03-2017
Iirc the pump itself runs at 3 bar, if you're testing it seperate from the fuel system. Otherwise as Ru says.
RE: What pressure does the LP pump run at - welshpug - 20-03-2017
the pump will typically run at whatever pressure the regulator is set at, so if you need more pressure then change the regulator.
RE: What pressure does the LP pump run at - bashbarnard - 20-03-2017
Thanks for all the info guys. Ill test what i have and go from there
RE: What pressure does the LP pump run at - Poodle - 21-03-2017
(20-03-2017, 05:01 PM)welshpug Wrote: the pump will typically run at whatever pressure the regulator is set at, so if you need more pressure then change the regulator.
This is a very valid point.
What pressure does the LP pump run at - bashbarnard - 21-03-2017
I dont require more pressure. I just neesed to know stats for testing purposes. As usual the forum has deliverd some stuff for me to look into
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