New manual fuel pump stopped working after 10 miles
Posted
#1603637
(In Topic #218410)
Newbie
Mark 1 1500cc Cabrio new fuel pump issue and symptoms
Hi I have a 1983 Golf cabriolet.
Recently I have changed over a lot of things due to age and not wanting to be stranded
eg Clutch, starter, water pump, thermostat, alternator, hoses, wiring loom for alternator, shocks and bump stops and manual fuel pump found on the front of the engine.
All these things were original 35 years old and as the car is doing a long trup this summer I did not want to be stuck in France.
I fitted a MEYLE German manual fuel pump and all was well and did a few local short journeys. On the 3rd journey, then at mileage total 10 miles, the car stopped so abruptly I though it was ignition related and so pulled in and checked the spark - lovely and juicy and fat.
The fuel filter on cranking ( visible type ) was dry, so I removed the pipes off the pump to confirm nothing being pumped.
The wife came and got me and then I returned with the old pump which I had not thrown away and was keeping as a spare.
On starting to remove the pump, as I loosened it, there was a pump action and fuel spurted. On removing the pump and activating the cam lever, the remnant fuel spurted out in a good stream and vacuum was created when putting finger over the inlet.
I took it back to the supplier and they said it was fine and so I was sent on my way.
This is no good as it should work on the car and is sold as a fuel pump for Mk1 Golf and Beetle The cam lever is very slightly longer but I cannot see how this would affect its operation other than maybe the piston on the engine hitting it earlier and never letting the lever return. However, the point of impact is under the lever, on looking at the old pump and is shown by the black dot.
Does anyone have an idea why it should work for 10 miles and then fall off the piston or suddenly not be able to "return" allowing the one-way valve to work ?
I'm lost on it as there is only one way to fit this and it would not have worked for 10 miles had a fitted it wrongly.
Thanks
Ted
I have posted picture of shiny pump x 2 The black dot is drawn on by me and represents the point of impact on the piston I saw on the old pump when I removed it. Obviously the old pump is on the engine at this point so I cannot show it
Recently I have changed over a lot of things due to age and not wanting to be stranded
eg Clutch, starter, water pump, thermostat, alternator, hoses, wiring loom for alternator, shocks and bump stops and manual fuel pump found on the front of the engine.
All these things were original 35 years old and as the car is doing a long trup this summer I did not want to be stuck in France.
I fitted a MEYLE German manual fuel pump and all was well and did a few local short journeys. On the 3rd journey, then at mileage total 10 miles, the car stopped so abruptly I though it was ignition related and so pulled in and checked the spark - lovely and juicy and fat.
The fuel filter on cranking ( visible type ) was dry, so I removed the pipes off the pump to confirm nothing being pumped.
The wife came and got me and then I returned with the old pump which I had not thrown away and was keeping as a spare.
On starting to remove the pump, as I loosened it, there was a pump action and fuel spurted. On removing the pump and activating the cam lever, the remnant fuel spurted out in a good stream and vacuum was created when putting finger over the inlet.
I took it back to the supplier and they said it was fine and so I was sent on my way.
This is no good as it should work on the car and is sold as a fuel pump for Mk1 Golf and Beetle The cam lever is very slightly longer but I cannot see how this would affect its operation other than maybe the piston on the engine hitting it earlier and never letting the lever return. However, the point of impact is under the lever, on looking at the old pump and is shown by the black dot.
Does anyone have an idea why it should work for 10 miles and then fall off the piston or suddenly not be able to "return" allowing the one-way valve to work ?
I'm lost on it as there is only one way to fit this and it would not have worked for 10 miles had a fitted it wrongly.
Thanks
Ted
I have posted picture of shiny pump x 2 The black dot is drawn on by me and represents the point of impact on the piston I saw on the old pump when I removed it. Obviously the old pump is on the engine at this point so I cannot show it
Last edit: by Eddie_P
Posted
Settling In
We had an issue once with fuelling and suspected pump, however it was rot in the fuel filler neck blocking pick up filter in tank. This caused a vacuum in the pipe between the tank and the pump, pointing to the pump not working, basically evry 10 or so miles it would run out of fuel and by removing pipe from pump would allow bits to drop off filter and we could drive on.
It may be worth checking filter in tank as I cannot see why new pump would work off the car but not again, it could be a coincidence this has happened with new pump or maybe it has better pulling power lifting bits off bottom of the tank.
It may be worth checking filter in tank as I cannot see why new pump would work off the car but not again, it could be a coincidence this has happened with new pump or maybe it has better pulling power lifting bits off bottom of the tank.
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( I am not sponsored by nor advertising duct tape or cable ties!)
( I am not sponsored by nor advertising duct tape or cable ties!)
Posted
Newbie
HI thanks for this./ Is there another filter on the tank piclup pipe?. I did not know this.
I put the new pump back on again, and took the car out with the old pump beside me and it drove fine and we are now in France.
I do not know why this happened and it is a mystery, don't forget it was when I removed the pump that the pump action worked when I broke down.
Thanks for your input
T
I put the new pump back on again, and took the car out with the old pump beside me and it drove fine and we are now in France.
I do not know why this happened and it is a mystery, don't forget it was when I removed the pump that the pump action worked when I broke down.
Thanks for your input
T
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