koiking125
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| posted on 18/4/10 at 07:36 PM |
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Fireblade fuel pump.
Just notice the fuel pump is running all the time, shouldn't it cut in and out as fuel is needed?? Sure it used to.
Any ideas please.
MK Owners Club Member (Frosty) No.1159
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55ant
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| posted on 18/4/10 at 08:05 PM |
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i have a fireblade pump on a pinto (fireblade carbs) it ticks maybe once per second when on tickover,
runs all the time if it doesnt have any fuel,
away from cars, now cycling and building TT bikes
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koiking125
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| posted on 18/4/10 at 08:43 PM |
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Theres plenty of fuel, would it run all the time if was sucking air and fuel??
MK Owners Club Member (Frosty) No.1159
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Paul TigerB6
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| posted on 18/4/10 at 08:59 PM |
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It should start out fairly quickly when the car first starts and then slow right down (but not stop). It needs to keep turning over to maintain the
pressure.
Have you taken the fuel pipe off the carbs and checked its flowing properly? Should soon bleed any air in the fuel line out with full flow going
through.
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koiking125
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| posted on 18/4/10 at 09:06 PM |
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No I haven't taken the pipe off the carbs, will check that tomorrow night and repost..
Any other suggestions??
MK Owners Club Member (Frosty) No.1159
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Mark G
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| posted on 18/4/10 at 10:15 PM |
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sometimes if the cap of the pump where the hoses connect gets bent/warped the pressure side of the pump just leaks back to the supply side so pressure
is not retained. This could be your problem if nothing else is obvious.
It can be fixed by adjusting the pump top but really you'd need to take it apart to know how to bend it.
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55ant
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| posted on 19/4/10 at 09:53 AM |
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just thinking have you got it mounted below the tank, its a gravity fed pump,
away from cars, now cycling and building TT bikes
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koiking125
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| posted on 19/4/10 at 10:49 AM |
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Pump is level with the bottom of the tank but fed from a pipe in the top, sucking from the bottom.
Everything has been fine for the past 2 years since I bought the car, only just started playing up this weekend as far as I know.
Thanks for the replies so far I will have a play tonight.
MK Owners Club Member (Frosty) No.1159
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koiking125
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| posted on 19/4/10 at 04:33 PM |
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If i give the pump a light tap while its running with just the ignition on it stops but when the engine is started it runs all the time.
If it turns out to be the pump, would one of these
do??Pump
MK Owners Club Member (Frosty) No.1159
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matt_gsxr
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| posted on 19/4/10 at 09:44 PM |
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If wacking the pump changes what it does then its probably the pump.
In my case when the pump kept going it meant I had (yet another) fuel leak from the carbs. So that is always something to look out for.
That Facet pump might work, but the general view is that those mitsubishi pumps that are used on bikes are a good option (generally reliable, cheap,
light, don't produce too much pressure).
Matt
p.s. I got so bored of the leaks that I went EFI.
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phil_far
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| posted on 20/4/10 at 05:03 PM |
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Pump shoudl be below fuel tank.
The shoudl stop ticking once pressure is build up in the system
If the pump is running than you have air/fuel leaks....I know the feeling and wasted months trying to solve the issue. Finally I discarded the carbs
in favour of a set cleaned and set by Andy (AB Performance)...then the fuel stopped ticking once and for all!
Philip
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