Originally Posted by Lambchop
Originally Posted by Stu @ M Developments
Originally Posted by Lambchop
as above...what are the symptoms for failure? Its been suggested to me that this might be causing my engine stutter.
When my car has warmed up the car can stutter on throttle. you can see from the fuel pressure gauge that pressure drops to zero. back off the throttle slightly and you can watch the pressure climb and then its ok until the next stutter!
when this happens the fuel pump also gets very noisy
thought it was fucked but i put on a new GpA badboy yest and its still the same!
rah
chop
Pressure drops to zero?
If that genuinely happens then either:
1) The regs fooked.
2) Pumps fooked.
3) Pump wiring no good or the lines are restricted.
4) Blocked fuel filter.
5) Intake to pump blocked.
I dont see ANY other possibilities at all.
cheers for reply stu...
yes you can watch pressure slowly drop on the gauge until you back off the throttle a touch and then it builds back up.
1. i was presuming the reg was ok because the pressure remains high on the gauge well after you turn car off. would this mean the reg was ok?
2. brand spanking GpA pump
3. next option...
4/5. could it really be that? car is PERFECT until its been run for 15mins or so. can boost as much as you like. then pump gets noisy and stutter appears.
any more thoughts?
No Pal, the little valve in teh end of teh pump is the one way check valve, the reg has no effect on pressure over time, only momentary pressure at given manifold depressions and pressures.
Fuel inlet, may be collapsing when the depression goes high, sometimes the inner skin may be collapsing internally, bit like an RS turbo intake hose if you follow from your old bean tin days yeah?
Why am i getting the feeling this car has NEVER had a new fuel filter here?
