Brettspeed Fuel Pump Solution - FI on high speed corners

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Mar 10, 2016 | 08:52 PM

#176

9krpmrx8

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From: San Antonio, Texas

Quote:

Originally Posted by dannobre

Something is going on

What pump are you running? ( Too lazy to try and find it ;( )

Walbro GSS342.

Quote:

Originally Posted by RotaryMachineRx

Dude I've been getting the same thing for a couple years now. I've tried 3 different pumps in two different assemblies; I've tried bypassing the fuel pump resistor to increase voltage with all these set-ups and I always get the same result. I'm wondering if maybe it is the pressure sensor for the gauge that is worn out and showing fluctuating rather than my actual fuel pressure?

All I know is that is doesn't have any effect of my AFR's so I've pretty much just chalked it up to being normal. I have an autometer mechanical fuel pressure gauge that is going on 5 years old now.

Mine just started doing this, I have been pushing it since running E85 and the car is running great.

I just don't want any simple issue like a bad pump blowing my engine. But I have been planning to get a new fuel pressure gauge so I may start there.

Mar 11, 2016 | 09:24 AM

#177

RotaryMachineRx

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From: Edmonton, Alberta, Canada

Yeah, I'll be able to know better this spring.... I have a boost leak somewhere between my EBC solenoid and my WG actuator. I'm thinking it's the actuator itself and it only becomes apparent once I get to like 9psi or higher. Regardless, should be able to properly monitor AFRs in conjunction with my fuel pressure dip once the leak is resolved.