fuel pressure bouncing
Turbo Mini Forums

i've just fitted a pressure gauge inline after my regulator because im havin some leaning off problems, and its fluctuaing, i;e its bouncing all the time, it does steady on normal un pressurised feed but as soon as you blow in to the regulator press feed it starts bouncing badly and you can hear the reg ticking and also feel the pressure fluctuate with your mouth, it kinda push and pulls when its doing it, any one else had this problem?, i've stripped the reg and its perfect, plus its only a year old, the fuel pump is a month old and the filter is new,
any help please as im sure this is why im leaning out after 12 psi,

I'd try another regulator.

Alex

AlexF

i know but there expensive and what would make it do this, everything appears to be fine

A customers of mine had a very similar problem and a new reg sorted it... I did investigate the old reg though.

Is the reg making a noise as the pressure varies?

Alex

AlexF

yes its ticking with it, like a vibration, also you can feel it if you put your tongue on the boost feed, it kinda pushes and sucks, if you know what i mean, like you can feel the diagphram moving up and down

It could be the diagphram in the reg is stretched. You can get a replacement diagphram for about £8.

yeh could be, it did seem a bit sloppy tbh, when i was putting it back together, spose its the only thing it maybe could be, i get one and give it a try.

i had same problem happened on the way back from avon, the pressure went on off on off on off.... and so did the fuel pump noises. got a new regulator and it was ok

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

This happened to mine when i fitted a fuel pump from a big Jag. The pump was to high a pressure and stretched the diaphram in the reg so the fuel pressure was fluctuating. Changed reg and put standard Metty pump on, problem sorted.

Phil.

WWW.TURBO-MINI.COM

ordered a new diaphram, see how it goes this weekend, thanks all for the help

jamie