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Bubble from Regulatory Pump

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Old 03-22-2005 | 08:46 AM
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Default Bubble from Regulatory Pump


I have this VP-40SG Regulating pump.
I see bubbles coming out after the pump.

I tried priming the pump, but I still see bubbles.
It is not very good as my engine fires inconsistently.

Wonder if my regulatory pump is faulty?
It seems to leak air into the fuel line.
Old 03-22-2005 | 05:58 PM
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Default RE: Bubble from Regulatory Pump

Does this happen only when the engine is running?

If so you need to insulate the fuel tank, I use foam rubber.
If the tank is vibrating badly you will get bubbles in the tank and they will simply be transfered to the engine.

If the pump was sucking air it would not be pumping very well.
If it had a leak on the pressure side you would have a fuel leak.
Old 03-22-2005 | 06:21 PM
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Default RE: Bubble from Regulatory Pump

Hi

The strange thing is, the fuel line is fine all the way from tank to the pump.
The air bubbles appear right after the pump!
Old 03-22-2005 | 06:44 PM
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Default RE: Bubble from Regulatory Pump

Usually the best place to put a fuel pump is right out of the fuel tank.

Have you played with the location of the pump?

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