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tips, technology, tools and techniques related to vehicle driveline components

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en
ian jenkins
Mississauga Ont canada
(67 posts)

Registered:
12/27/2010 11:06AM

Main British Car:
77 tr7

'90s Rover EFI fuel pressure regulator
Posted by: en
Date: August 13, 2011 08:04PM

HI
I'm slowly learning how these systems work.
I've read of rising rate fuel pressure regulators, but these are the opposite.

'The regulator is a mechanical device controlled by plenum chamber vacuum; it ensures that fuel rail pressure is maintained at a constant pressure difference of 2.5 bar above that of the manifold."

at Wide open throttle, plenum vacuum would decrease? the regulators would maintain a lower fuel rail pressure?
I hate asking basic questions, but i haven't had any luck finding a good source book on how the system works


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: '90s Rover EFI fuel pressure regulator
Posted by: BlownMGB-V8
Date: August 13, 2011 09:17PM

Manifold pressure increases at WOT. (vacuum decreases to near atmospheric). So the reference signal to the FPR increases, which increases the fuel pressure.

JB


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