Alternator issues

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Re: Alternator issues

Postby 937carrera » 15 Apr 2018, 16:35

You could do what VW did on some of their later cars:

Make an arrangement so that opening the drivers door triggers the fuel pump relay. The fuel system is then always up to pressure when you first crank the key (injection) or the carb bowls are full.
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Re: Alternator issues

Postby bigherb » 15 Apr 2018, 18:35

The best way is to fit a tachometric relay although not the cheapest, pumps fuel as soon as the engine starts cranking from the coil switching signal.

https://www.ebay.co.uk/itm/New-Fuel-Pum ... SwMvtZSSUu

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Re: Alternator issues

Postby Paradise City » 15 Apr 2018, 20:37

Might look into that, thanks.
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Re: Alternator issues

Postby Paradise City » 27 May 2018, 13:25

Thought my fuel pump issues were solved!

Broke down on way to campsite on south coast on Friday.
Luckily it was about 300m from Motorline Engineering in Firle who got me back up and running. The fuse (7.5A) to the fuel pump had blown.

Anyway, got as far as the Norman's Bay campsite (lovely campsite by the way!) with no further issues.

Only got a few miles up the road the next day and the same thing happened. Complete faff taking off the bike rack to get at the engine bay to replace the fuse. 2 more miles, cut out again. I cut my losses at this stage and got lifted by the recovery van to get home.

I don't know what's causing the issue as it's been running fine since installing the new pump up until now. Maybe a short circuit somewhere.

Anyway, I'm going to order a tachometric relay and rewire the whole thing with the fuse up near the glove box so I don't have to worry about accessing the engine bay while stopped at the side of the road.

Anyone else have any issues with pumps blowing fuses?
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Re: Alternator issues

Postby bigherb » 27 May 2018, 13:42

Which electric fuel pump did you fit?
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Re: Alternator issues

Postby Paradise City » 27 May 2018, 21:54

Facet posi flo, 1.5-4psi
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Re: Alternator issues

Postby bigherb » 28 May 2018, 08:04

Paradise City wrote:Facet posi flo, 1.5-4psi

Facets draw less than 3A, Unlikely to be the pump unless there is a short in the pump. Check the wiring routing for chafing against the body.
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Re: Alternator issues

Postby Paradise City » 29 May 2018, 15:21

Going to rewire it with new relay. Hopefully that'll sort it. Otherwise it's probably a faulty pump.
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Re: Alternator issues

Postby Paradise City » 03 Jun 2018, 19:35

Quick question before I start wiring. On the coil, which is terminal 1 and which is terminal 15?

https://drive.google.com/file/d/1ZREJlkhGSmlQCX8hspwk3yYd-zq22oT1/view?usp=drivesdk


You should be able to view that now BH
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Re: Alternator issues

Postby bigherb » 03 Jun 2018, 21:35

The one marked 15 is 15 the other one is 1
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Re: Alternator issues

Postby Paradise City » 03 Jun 2018, 21:52

Ha ha, should've gone to Specsavers!

Cheers Herb!
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Re: Alternator issues

Postby IAN-H » 04 Jun 2018, 08:56

Had a similar problem with a Riley 1.5 which was parked up for long spells. I put an electric pump in parallel with the manual pump between the manual pump and the carb. Switch on, the electric pump primes, but once started the manual pump takes over the supply, pressurises the electric pump which then stops, so no complicated wiring. Just wire the electric pump straight to an ignition supply

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Re: Alternator issues

Postby IAN-H » 04 Jun 2018, 09:37

I' an iriot. I meant in SERIES. Fuel Tank, manual pump, electric pump,
carb
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Re: Alternator issues

Postby CovKid » 05 Jun 2018, 07:40

Unfortunately the facet electric pump has to be as near to tank as possible. It pushes rather than pulls fuel through.
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Re: Alternator issues

Postby Paradise City » 08 Jun 2018, 07:17

I think I've found the short anyway which is a relief.

https://drive.google.com/file/d/1GibDFi_zkJ4V-iB6A9pRlG6ttI9J8w-F/view?usp=drivesdk

Will have to protect the new cables a bit more when rewiring.
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