Fuel pump (not) priming

Technical questions and Maintenance advice post in here please
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Nikki&Austin
Posts: 89
Joined: Tue Dec 20, 2016 8:39 am

Fuel pump (not) priming

Post by Nikki&Austin »

A further question whilst we sort out the wiring.

The car has been laid up for a few months whilst we get on with life.

Half a tank of fuel in threre.

The hopeless fuel pump that came with the car has a new diaphram and is all cleaned out, but no amout of priming with the lever will get fuel flowing to the carb (nor will turning over the engine)

When priming, the usual wheezy sound of air to start with then a squeek from the diaphram, but it never gets to the slosh sound of fuel coming through.

Tried with the fuel pipe not connected to the carb, but same issue.

The lid is tight, seems as if the air in the pipe just flows back and forth ?

Same happens with fuel cap off.

Again, any suggestions ?

Thanks
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Neil Evans
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Re: Fuel pump (not) priming

Post by Neil Evans »

Remove the pump from the engine, fit the short pump to carb pipe in the other hole pointing downwards, place in liquid and 'prime' the pump. If it pumps now it's more than likely either...

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Tight Yorkshireman
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Re: Fuel pump (not) priming

Post by Tight Yorkshireman »

Try Neils suggestions first but,............also did you change the valves? I found a big difference with new valves fitted and have done a few of these!

John G 8)
John (Tight Yorkshireman)
First referred to as the Tight Yorkshireman in editions of the Clubs Spotlight: Autumn 1996 Page 40 and Autumn 1997 Page 15
Mark Thornton
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Joined: Fri May 20, 2016 7:45 pm

Re: Fuel pump (not) priming

Post by Mark Thornton »

Excellent advice re the valves,

I've recently re-commissioned my AS3 after a good few years and had a problem with the fuel pump, on and off for a while now, problems were running badly, cutting out, not accelerating and generally not behaving.

I finally took the plunge and pulled the pump off the car, I had previously fitted a new diaphragm, but this time I stripped everything, cleaned everything as best as possible, how I got those vales back I don't know, that was more luck than judgement.

I have just started the car first time in 3 days, no problem with no pump priming required and she's just done a 5 mile tip without any problem, in fact best she's driven for a good while.

Thanks for the comment and advice

Cheers

Mark
Tight Yorkshireman
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Re: Fuel pump (not) priming

Post by Tight Yorkshireman »

Nice one Mark :thumbs:

John G 8)
John (Tight Yorkshireman)
First referred to as the Tight Yorkshireman in editions of the Clubs Spotlight: Autumn 1996 Page 40 and Autumn 1997 Page 15
Mark Thornton
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Re: Fuel pump (not) priming

Post by Mark Thornton »

You're most welcome John

:cheers:
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