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MG MGB Technical - 72 B FUEL PUMP
|1972 MGB. Runs good but pump never seems to stop. No fuel leaks.|
Pump seems to hum rather than click-click.
Do you know if it is an original type SU pump? An SU can continue clicking without leaking when some valve in them leaks (I believe back to the tank). But, I have not heard of them humming, though I have never had the solid state type SU. There are some generic pumps that continue running. I think the Facet does, but I believe it also clicks.
|C R Huff|
|This is a totally origina one owner car with 52000 miles.|
I have not seen the car today but the way he describes it as if it is either pulsing extremely fast or humming. I will see it tomorrow.
|Sounds like the pump is short stroking and the valves are shot - that would be just about the only thing that would cause it to hum. I have seen some of the all electronic pumps do that, but not the original points style pump. It could also be a diaphragm that is stiff as a board that will sometimes cause that. Cheers - Dave|
|Sandy & Charlie. My 79 has the the SU fuel pump with the solid state electronics. It ticks just like the original dual point set up. |
Curious to know if your fuel pump is the original one.
|I may get to see the car this weekend. I will keep you informed.|
|When mine (electronic!) was short-stroking it resulted in severe fuel starvation such that it wouldn't run. Intermittent, so eventually replaced with a points type and no more problems.|
This thread was discussed between 23/06/2015 and 24/06/2015
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