Fuel Pressure Regulator Buzzing/humming

[jamesdt]

Ok guys the other nite I had fitted up my plazmaman fuel rail along with the 1000cc xspurts mounted a new magnafuel fpr, re done all the fuel lines. Got the car running but I've got a humming/buzzing noise is coming from the fuel pressure reg. if you hold the reg u can feel it. The noise is quite loud and really annoying. I've played around with the fuel pressure between 30-40psi and the noise changes as you go up In pressure. Any one else come across this? Is it just the pulasation from the fuel pump? The buzzing noise was never there with the factory fuel rail and reg..

If there's no fix for this ie changing the fuel dampner with another one from a different car ill have to change the reg its far too annoying.

What regs are use using that are e85 friendly? Cheers

[scotty nm35]

All regs will make some noise, mainly at idle, especially high flow aftermarket ones. What pump are you using?

You could try rubber isolation of the reg, or fitting the stock dampeners back into the fuel system? I use an SX reg, it has been perfect for many years on ethanol.

[jamesdt]

Currently it's a walbro 255 intank. The reg was hard mounted and I thought of rubber mounting but even with the reg removed and holding it in your hand the sound is the same. I was reading up else where that after market regs have a stainless needle and seat and pulsations from the fuel pump and injectors opening and closing can make this chatter. What's got me stuffed is the factory fuel damper is still installed but in standard form from the factory, the fuel damper is down stream after the reg on the return line. I thought you would want this installed either after the fuel filter/before the fuel rail, or after the fuel rail and before the fuel reg so the pulsation damper can actually absorb some of the pulsations from the fuel pump and injectors..