What could kill a new fuel pump? twice
08-15-17, 03:09 AM
#1
Senior Member
Thread Starter
What could kill a new fuel pump? twice
So today morning i started driving to work and the car died.. So i just recently had the same problem and when i turned the ingition on i couldn't hear the fuel pump prime.. but i could hear the relay click.
The last pump lasted for 3hours+ 350 kilometers and the new new pump lasted for about 1000 kilometers.
The before one did not have resistance, when i gave it a little knock it showed some resistance but died as soon as the power came on.
So what could cause a new fuel pump to die?
Tank is as clean as it can be, never under 1/4 filled, valvoline premix, E98 fuel always from a quality gas station, new + wire directly from the ecu (MS2) and battery. The pump itself is a HRC 340lph race grade unit, known to work on a fc for a longer period time.
It's getting pretty expensive and annoying to change the pump so often and to leave the car on the side of the road.
Thanks in advance.
The last pump lasted for 3hours+ 350 kilometers and the new new pump lasted for about 1000 kilometers.
The before one did not have resistance, when i gave it a little knock it showed some resistance but died as soon as the power came on.
So what could cause a new fuel pump to die?
Tank is as clean as it can be, never under 1/4 filled, valvoline premix, E98 fuel always from a quality gas station, new + wire directly from the ecu (MS2) and battery. The pump itself is a HRC 340lph race grade unit, known to work on a fc for a longer period time.
It's getting pretty expensive and annoying to change the pump so often and to leave the car on the side of the road.
Thanks in advance.
08-15-17, 01:22 PM
#4
Senior Member
Thread Starter
Strainer was clean but i have not checked the fuel filter altough it was new when i drove it 4 years ago, but 4years is quite a long time actually, will check it.
Fuel pressure showed 4bar as usual, would'nt it be lower when filter is clogged?
Fuel pressure showed 4bar as usual, would'nt it be lower when filter is clogged?
08-15-17, 04:08 PM
#6
That pump is a Walbro GSS340 or knock-off thereof.
https://walbrofuelpumps.com/walbro-gss-fuel-pumps
Fuel pump is not Ethanol compatible.
Try a Walbro 450LPH, it is E85 compatible (though not listed for use with E98) so it might last longer.
https://walbrofuelpumps.com/walbro-gss-fuel-pumps
Tank is as clean as it can be, never under 1/4 filled, valvoline premix, E98 fuel always from a quality gas station, new + wire directly from the ecu (MS2) and battery. The pump itself is a HRC 340lph race grade unit, known to work on a fc for a longer period time.
Try a Walbro 450LPH, it is E85 compatible (though not listed for use with E98) so it might last longer.
08-16-17, 03:51 AM
#7
Senior Member
Thread Starter
I sent the last one back to hrc, checked yesterday, they said the tech man just got it, so probably takes some time. The new one is on my desk right now. Exactly the same problem. Tried with 12v.
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08-18-17, 02:37 PM
#8
Senior Member
Thread Starter
I feel like a total dumbass, thats what I am. Backprobed the pump, constant 13.9V, ECU log shows the same and then is the cheap to replace fuel filter...
Although it was new 4 years ago, it was now filled with black stuff- fuel mixture, probably rubber particles from fuel hose, opened the filter, didn't see exactly how filled it was but i guess it was done because the black stuff is very small- clearly seen from a clean container it had a metallic shine to it also..
Guess that was the problem, because everything else seems like it should be...
Stupid stupid stupid....
Although it was new 4 years ago, it was now filled with black stuff- fuel mixture, probably rubber particles from fuel hose, opened the filter, didn't see exactly how filled it was but i guess it was done because the black stuff is very small- clearly seen from a clean container it had a metallic shine to it also..
Guess that was the problem, because everything else seems like it should be...
Stupid stupid stupid....
08-19-17, 03:27 PM
#10
Senior Member
Thread Starter
E98 up here is the usual premium fuel, the fuel system just has been empty the whole time i guess, with some fuel in the hoses. The short hoses near the tank are old so maybe this black stuff came from there, or maybe its from cutting new hoses but i made sure to clean them with brake cleaner before install..
Anyway i hope this solves the problem
Anyway i hope this solves the problem
08-24-17, 03:00 AM
#11
Senior Member
Thread Starter
Opened the pump, because the answer from HRC has still not come.
One of the brushes was stuck, the other is almost worn out, my workmates say its because it was dirty... and burned the copper rotor as seen on the picture..
Can a dirty fuel filter let the black stuff through of it? it seems that it got the same stuff inside as the fuel filter, but it can be debris from burning between the brushes and the rotor?
I'm trying a cheaper pump that i can buy locally, so if it dies it wont be so hard on my thin wallet, but i'm still worried it will happen under boost..
One of the brushes was stuck, the other is almost worn out, my workmates say its because it was dirty... and burned the copper rotor as seen on the picture..
Can a dirty fuel filter let the black stuff through of it? it seems that it got the same stuff inside as the fuel filter, but it can be debris from burning between the brushes and the rotor?
I'm trying a cheaper pump that i can buy locally, so if it dies it wont be so hard on my thin wallet, but i'm still worried it will happen under boost..