1989 GTI Cabriolet possible fuel supply issue
Posted
#1659406
(In Topic #235804)
Newbie
I replaced the fuel pump relay as when I first bought the car it occasionally wouldn’t start and I was told the relay was the issue and have not had this problem since, however I’m wondering if perhaps I have bought the wrong relay. Could anyone link me to the correct one?
I have ordered a new in tank fuel pump and will trace the wires to check for damage or corrosion.
Has anyone got any other suggestions/possible solutions? Or any way of diagnosing anything else that it might be?
Thanks!!
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Posted
Local Hero
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
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They all start with GOOD Grounds.
Where are my DIY Links?
Posted
Newbie
1989 GTI Cabriolet possible fuel supply issue
I checked the diagrams and the pin layout is correct but the circuit looks nothing like either of the pictures!
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Posted
Local Hero
Does the main fuel pump get noisier when the car plays up?
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
Newbie
1989 GTI Cabriolet possible fuel supply issue
I definitely notice a whining noise that sounds like it’s coming from the underside of the car on the side of the filler neck. Any ideas what that could be?
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Posted
Local Hero
The main fuel pump is not the quietest in the world so don't expect it to be silent.
Did or does the main pump underneath the car get noisier when the problem started?
The lift pump is cheaper and easier to replace than the main fuel pump but it may be worth changing that and see if that helps.
When my lift pump started to fail you could accelerate slowly but if you tried to floor or the car would cough and splutter.
There is also a little bit of rubber fuel hose which joins the lift pump to the fuel sender, as it’s sat in petrol most of the time it can rot so it worth changing that when changing the lift pump. It must be the same length as the original or the fuel pick up will be either to low or to high in the tank. The Haynes manual tells you the length the hose should be.
Lift pump is like this
https://www.ebay.co.uk/itm/200691149226?epid=251916676&hash=item2eba1fe9aa:g:wFYAAOSwcwlfslHy
Last edit: by mark1gls
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
Local Hero
The after market fuel pump relays don't seem to be very good quality so fit the VW relay No62 relay if you still have it and keep the unnamed one as a spare in the glove box.
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
Newbie
1989 GTI Cabriolet possible fuel supply issue
I’m not sure if I did keep the original relay, I’ll have to look for it
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Newbie
1989 GTI Cabriolet possible fuel supply issue
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Local Hero
The bit of rubber hose I'm talking about the the one that goes from the lift pump to the main body of the sender.
1984.5-1993 mk1 How to change your in-tank fuel pump | Volkswagen Owners Club Forum
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
Settled In
1990 Golf GTI cabrio 1.8i. DX Engine
Posted
Newbie
1989 GTI Cabriolet possible fuel supply issue
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Settled In
Lift pump can be tricky to get in and out so be careful not to snag the float. Good luck.
1990 Golf GTI cabrio 1.8i. DX Engine
Posted
Local Hero
Some folks won't read the links, so here is a gimmee.
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
Posted
Newbie
1989 GTI Cabriolet possible fuel supply issue
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Posted
Local Hero
I've not had any problems with it falling off but I'm very careful getting the pump and float out and into the tank.
Something else to be careful with is the rubber O ring which seals the fuel sender in the tank, a little bit of grease helps hold it in place when fitting the sender.
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
Posted
Local Hero
I had one that was an iffy fit and the third time I dropped it in the tank inserting it, I have the Eureka moment. Just keep it on long enough to get the sender/pump down then either untie it or cut it off and pull the knotted side so the loose side comes all the way out.geobuckland said
[mention]Briano1234 [/mention] I was going to just cable tie the filter on, do you think it’s okay to keep that there permanently?
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What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
Posted
Newbie
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