MOT nightmare

So, I recently had some welding done in a local garage to get me 1.8 GTI cab through it's MOT.

When I picked her up they told me that they'd notice some of the fuel lines looked like they were on the way out so they'd replaced them for me, all fine so far.

However, five minutes after getting the car home, the engine starts running really rough and the whole car stinks of petrol, when I open the bonnet, fuel is being sprayed into the engine bay from the fuel line that connects underneath the expansion tank.

I'm a bit of a novice but I'm guessing the hose they've used can't handle the pressure of an injection engine.

There's no way I'm going to trust them to sort it so if I were to buy 7.9 mm stainless steal braided fuel line from Heritage would that be the correct diameter to use?

Also the current fuel hose is connected with a jubilee clip, is that suitable?

Thanks for any advice.

 

"The current fuel line is connected with a jubilee clip"…

What are they  doing… Yes old school Bosch K-jet fuel injection runs at high pressure so you need the proper hoses and connections once the engine side of the fuel system.

What ever you do don't drive the car again till it's fixed, you was lucky it did not go up in flames, petrol on a hot engine is not good…..

Can the garage which did the work collect the car and fix the problem they created?

Do you have a picture of which part they replaced?

To be honest I don't trust them to do a good job so I'd rather do it myself.
The fuel line that they've replaced comes from the bottom of the engine block and connects in the engine bay underneath the expansion tank behind the fuel filter.
Thanks for your help.

Still not sure which hose you mean…
What car you got, year and engine code?

Have a search on here to find a part number..

https://volkswagen.7zap.com/en/rdw/golf/go/1981-26/1/133-50000/

The hose to feed fuel into the fuel filter from the metal ridged fuel lines, underneath the expansion tank on my car is this one but not sure how they fitted a new hose with jubilee clips??

https://www.ebay.co.uk/itm/VW-GOLF-CADDY-MK1-CABRIO-SCIROCCO-GTi-8V-K-JET-FUEL-SUPPLY-BRAIDED-HOSE-PIPE/401624137970?hash=item5d82aa00f2:g:F5UAAOSwv0tVOh7i:rk:11:pf:0


Any thing here?

https://www.classic-vw.co.uk/fuel-pumps--pipes-829-c.asp

Knowing the year, and the Injection or fuel type Carb, CIS, or Digifant means alot.

The Digifant and Carbed ones have a working pressure that doesn't exceed 45psi.  Where as the CIS has a working pressure of 75psi and require heavier Fuel connections as in Bango-bolts and sealing washers.

On CIS cars, there is no real expansion tank that I can think of… as it comes out of the pump to the filter.

There is a Filter/Sump that is plastic and can leak, but that too can be cause by a wide Variety of things, and since it is after the in-tank pump, it is at 45psi and can have screw hose clamps, but the ones after the Fuel pump, all have banjo bolts as the Primary pump is @ 75 psi.

If you are talking about the accumulator, then that too has Hard connections to it.  

A picture goes a long way in helping us help you.

Typical CIS



typical Digifant


Typical carb

Thanks, I'll take a couple of pictures and post them tomorrow.

So, I've had another look and I'm fairly sure it's the line from/to the accumulator, the line next to it (from the fuel distributor?) is the same and both are attached with jubilee clips.
I've got a 1984 GTI cab, DX engine code.
Helpfully, the photo's upside down for some reason  

Yes, that looks like they have replaced a section of the original hard fuel line that ran under the car with some fuel hose and simply slipped the hose over the end of the remaining bit of hard pipe that connects to the hose onto the filter which has the correct threaded connection.  Not sufficient, especially if the hard pipe has been left as a straight section (if it had been bubble flared it would have had a better chance of sealing with a fuel hose clip behind the flare).  If I was you, to do a proper repair, I would replace with one of the stainless braided fuel lines from Crazyquiff or Classic-VW, this will join directly to the threaded female connection in your pic.  Not cheap, but not a bodge job either.

I presume the other end of that rubber hose is also attached to the underside hard line by the same sort of fuel hose clip?

Personally I think that is a repair.  Notice the hard line, and union above the pic?  (ok below)…

A jubliee clamp is prone to leaking at small diameters.  If you look at the clip, it can't circularly close, it elongates on the hard point of the clip so that it slightly puckers.

This is a no-no on fuel parts, a fuel pump clamp is far superior to these as it tightens around equally.

You can google images of Fuel Hose Clamps and Hose clamps and see the differences.

Second a typical hose to pipe should have a barb on the end that the hose slides over to the clamp has a stop point to rest against.

I have had issues with the hard line to Fuel pressure regulator on my Digi @45psi with Jubliee type clamps that were resolved with Fuel Hose clamps, one of the TSB's for the hard to rubber line failures.  You can also see this on the Radiator expansion point.  

While I can't swear that because of limited first hand knowledge of the CIS systems, I can only advise on what I have found out over the years I have been playing with Jubliee, or Worm geared clamping versus Fuel or circular clamps.

Thanks, yes the replacement fuel line is attached to the original fuel pipe with another jubilee clip.

I'll buy some of the braided hose and sort it myself.

Am I right in think 8mm diameter is correct?

I can't believe an actual mechanic wouldn't know any of this stuff 

You might have the same problem with the braided stainless hose unless you use the correct connections, hence why I suggested the CQ or Classic-VW lines as they have pre-formed ends with the correct threaded fittings.

But either way, 8mm is correct for a DX engine

Ah okay, I know which ones you mean, I'll get them ordered today.

Thanks for your help.

 

I would fix it properly that's not a good job the garage did and frankly I would say dangerous as the jubilee clip is right at the end of the rubber hose and really they should use fuel hose clips when fitting fuel hose but being injection its not really up to the job, OK if it  was a carb car but the pressure the K-jet runs at it need proper fixing.

Fuel lines…..
It's easier to fit the flexible hose but they are pricey but they should out last the car! Be worth phoning up as yours is a change over year being an 84 so you can check you get the right parts….

Might be worth joining the Mk1 Golf owners club as you can get discount at these 2 places so it will pay for your membership and some more….

http://www.golfmk1.co.uk/Items.php?cat=SLAREA&group=UNDERSIDEFUEL

https://www.classic-vw.co.uk/fuel-pumps--pipes-829-c.asp

 

Use some 8mm kunifer pipe and compression joints

So. this is worth situation. U can read more on https://groundclearances.com/

Hi all. Sorry for hijacking the post but can someone tell me the part number in the diagram for part number 3 CIS. Injection engine.

Thanks for all the help. I've ordered the new fuel lines, any advice on fitting them? Can it be done without having the car on a ramp?

Did you buy solid or flexible fuel lines?

Flexible