fuel pump issues
26 June 2010, 06:35 PM
#1
fuel pump issues
I have a my98 uk 2000, i have just removed the engine to fit another clucth and bearing so am checking the engine whilst its out, the engine did have a slight miss fire\ hesitation also, one thing what i was baffeld about was though, i removed the engine, and pushed the car out of the garage to work on, i realissed that i had left a window open so connected the battery to which fuel came firing out everywhere!! Is this correct? i thought that the fuel pump only primed once or twice and stopped? this one keeps on firing fuel constantly? i just thought this was strange as every time i started the car i could smell fuel and thought it may be over fueling? can someone shed some light on this for me please, out of interest the pump is a walboro 255 with the standard fuel pump filter attached. 
27 June 2010, 06:41 PM
#6
Hi mate yeah i think your right, i forgot to add that that the pump fires up even if the ignition is off providing the battery is connected then it just keeps running and running mate, anyideas what could be causing this thanks lee.
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28 June 2010, 02:12 AM
#8
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just rewire it to a wire under the dash that only becomes live when the ignition is on (most probably a yellow wire) then it would only come on when you turn the key 
or you can just get one of those cool switches with the safety cover and just wire the pump up through that.
providing you remember to turn it off when finished with it to avoid battery drain and fuel forced through the engine. not only would it look cool it could be seen as a safety feature
or you can just get one of those cool switches with the safety cover and just wire the pump up through that.
providing you remember to turn it off when finished with it to avoid battery drain and fuel forced through the engine. not only would it look cool it could be seen as a safety feature
28 June 2010, 02:12 PM
#9
Thanks for the advice mate but dont really wan to rewire it atm ill leave that for a last resot, there must be some reason for it not stopping like the relay maybe dodgy or something to that effect?? anyone else with any ideas as am stuck at the mo!!!
28 June 2010, 11:09 PM
#12
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It's very difficult to work out what's going on from the description here. The fuel pump is supposed to pressurise the rail every time you turn the ignition on - so it's not at all surprising to hear it squirting fuel into your engine bay when you tried to shut the window.
However, the pump should shut off after a second and a half. Is that what happened or did it keep running? If it did, without seeing the car and knowing what sort of state of disassembly at the moment, it's impossible to know what the cause is. Has the car had any electrical work done to it, either by yourself or a previous owner? Has, for example, the pump relay been replaced or augmented with a manual override?
If, looking at your later posts, it runs whenever the battery is connected, then surely you would have noticed this prior to now? Aside from that you'd hear it constantly whirring away, it would have flattened your battery and/or killed the pump.
As such, if this wasn't happening before, it seems that whatever is causing the pump to run constantly is something that's happened while you've had the car in pieces. It's clearly not possible for us to know what you've done - but weren't you posting the other day about neutral position switch and speed sensor problems? If so, sounds like you have a few electrical issues to deal with. Having your car looked at by someone who knows what they're seeing probably wouldn't be a bad idea, there's very little we can do from here.
However, the pump should shut off after a second and a half. Is that what happened or did it keep running? If it did, without seeing the car and knowing what sort of state of disassembly at the moment, it's impossible to know what the cause is. Has the car had any electrical work done to it, either by yourself or a previous owner? Has, for example, the pump relay been replaced or augmented with a manual override?
If, looking at your later posts, it runs whenever the battery is connected, then surely you would have noticed this prior to now? Aside from that you'd hear it constantly whirring away, it would have flattened your battery and/or killed the pump.
As such, if this wasn't happening before, it seems that whatever is causing the pump to run constantly is something that's happened while you've had the car in pieces. It's clearly not possible for us to know what you've done - but weren't you posting the other day about neutral position switch and speed sensor problems? If so, sounds like you have a few electrical issues to deal with. Having your car looked at by someone who knows what they're seeing probably wouldn't be a bad idea, there's very little we can do from here.
Last edited by Splitpin; 28 June 2010 at 11:11 PM.
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