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Omex throttle bodies - fuel line warning! #756210
21/09/22 10:42 PM
21/09/22 10:42 PM
Joined: Sep 2011
Posts: 14,031
Mandello del Lario
Gambalunga Offline OP
Member of the Inner Circle
Gambalunga  Offline OP
Member of the Inner Circle

Joined: Sep 2011
Posts: 14,031
Mandello del Lario
This is important for anyone who has an Omex throttle body kit installed particularly if it includes Jenvey throttle bodies.
I fitted such a kit in 2014 and about 12 months later I had a short piece of fuel line tube slip off the injector fuel rail whilst I was driving. Petrol sprayed everywhere and the car cam to a stop. I was quick to turn off the ignition and fortunately nothing ignited.
The problem was quickly fixed and examination of photos taken when the throttle bodies were fitted seemed to show the tube clamps sufficiently tight so it was a bit of a mystery.
A little while later I was at Omex and mentioned this issue. Richard Wragg checked the tube and stated that it must have been from a bad batch as it was showing cracks in the tube. He replaced it and gave me a short length of spare tube. He assured me that the fuel line that they used was certified!
Today I went to take the Morgan for a run and as soon as I turned the ignition on the ventilation fan brought a lot of petrol fumes into the car even before I actuated the starter. I immediately turned off and checked the suspect tube only to find that it was dripping with petrol.
The tube in question is in the photo below and connects the small blue regulator to the injector fuel rail.

[Linked Image]

You can clearly see the cracks in the fuel line.

As a matter of urgency I would suggest that all owners of cars fitted with throttle bodies check any such tube and, even if it seems OK, have it preventative replaced as soon as possible.

I have the spare tube that I can use but will fit a better alternative as soon as I can find one. The original tube clearly can not stand the heat and pressure well enough. I stress that this does not apply to the Morgan fitted fuel lines but to the short connecting tube supplied by Omex.

If you own a Plus 4 or 4/4 fitted with Omex throttle body kit (possibly including the Plus 4 SS) or know anyone who has such a car please get it checked. The possible consequences of pressurised fuel spraying all over the engine bay does not bear thinking about!


Peter

[Linked Image]
Re: Omex throttle bodies - fuel line warning! [Re: Gambalunga] #756215
22/09/22 12:21 AM
22/09/22 12:21 AM
Joined: Nov 2011
Posts: 5,981
Australia - NSW North Coast
OZ 4/4 Offline
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OZ 4/4  Offline
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Joined: Nov 2011
Posts: 5,981
Australia - NSW North Coast
A valuable warning Peter. Glad it was not catastrophic for you

Last edited by OZ 4/4; 22/09/22 04:33 AM.

A Morgan Identified Fastidious Owner...
2011 4/4 Bespoke, 1981 Delorean, Auburn Boat Tail
Re: Omex throttle bodies - fuel line warning! [Re: Gambalunga] #756229
22/09/22 08:52 AM
22/09/22 08:52 AM
Joined: Jul 2007
Posts: 23,217
Suffolk, England
John V6 Offline
Brooklands Register contact
John V6  Offline
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Posts: 23,217
Suffolk, England
Ouch. Maybe talk to people like Car Builder Solutions for advice on a higher rating solution. Link here Fuel lines


JohnV6
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Omex throttle bodies - fuel line warning! [Re: Gambalunga] #756233
22/09/22 09:24 AM
22/09/22 09:24 AM
Joined: May 2014
Posts: 4,258
Essex
Burgundymog Offline
Black Rat
Burgundymog  Offline
Black Rat
Part of the Furniture

Joined: May 2014
Posts: 4,258
Essex
Is it Ethanol related ?


Keith
2013 narrow bodied + 4 Ruby.
Re: Omex throttle bodies - fuel line warning! [Re: Gambalunga] #756240
22/09/22 12:08 PM
22/09/22 12:08 PM
Joined: Oct 2008
Posts: 3,354
BELGIUM
1560 Offline
Goodwood Drifter
1560  Offline
Goodwood Drifter
Talk Morgan Addict

Joined: Oct 2008
Posts: 3,354
BELGIUM
Stay safe Peter!!!!


Steven
sold: M3W'12, Aeromax'09,V6'09, 4/4'86
now: LM62'22, Def110'20, Yaris GR4
Re: Omex throttle bodies - fuel line warning! [Re: Gambalunga] #756243
22/09/22 12:26 PM
22/09/22 12:26 PM
Joined: Mar 2014
Posts: 685
Berkshire/Oxon & Devon
J
JB62 Offline
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JB62  Offline
Talk Morgan Regular
J

Joined: Mar 2014
Posts: 685
Berkshire/Oxon & Devon
When I had my 4/4 Competition- I had exactly the same issue. It is slightly alarming as the petrol shoots out. I smelt it and turned everything off.

A good warning.


Porsche 981 Spyder
V8 Speedster ( 5 years)
4/4 Competition spec (5 years)
4/4 4str Kent ( 10 years)
Re: Omex throttle bodies - fuel line warning! [Re: Gambalunga] #756310
23/09/22 06:46 AM
23/09/22 06:46 AM
Joined: Feb 2016
Posts: 5,511
East Harling, Norfolk UK
RichardV6 Offline
Charter Member
RichardV6  Offline
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Joined: Feb 2016
Posts: 5,511
East Harling, Norfolk UK
The cracking seems to be on the outside Peter. Did you notice it earlier before the leak? Reason I ask is that such don't happen overnight usually.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1945 Moto Guzzi Airone
Re: Omex throttle bodies - fuel line warning! [Re: RichardV6] #756411
23/09/22 09:46 PM
23/09/22 09:46 PM
Joined: Sep 2011
Posts: 14,031
Mandello del Lario
Gambalunga Offline OP
Member of the Inner Circle
Gambalunga  Offline OP
Member of the Inner Circle

Joined: Sep 2011
Posts: 14,031
Mandello del Lario
Originally Posted by RichardV6
The cracking seems to be on the outside Peter. Did you notice it earlier before the leak? Reason I ask is that such don't happen overnight usually.

Last I looked it seemed OK but I was keeping an eye on it and that is why my immediate thought was that tube when I smelt petrol.

I have since spoken to my local workshop and they agree that this type of tube can be subject to deterioration with heat and we have had an exceptionally hot summer so the engine bay has probably reached some pretty high temperatures. He suggested a heat insulation wrap and preventative changing the tube every 2 or 3 years.

It was last replaced in 2018.

Said tube has now been replaced with the same type of tube but I don't really trust it. Some research on the net seems to indicate that failing high pressure fuel lines is not an unheard-of problem. It probably explains some of the otherwise mysterious car fires that you hear about.

I then phoned Jenvey (the manufacturers of the throttle bodies), and subsequently emailed photos, to see if they had a solution but other than agree with our local mechanic they suggested that I should try Goodridge stainless-braid tubing.

Now all I have to do is find a local supplier so I don't have to pay customs clearance, tax, and fees on a 3" piece of tube. Ah! The joys of Brexit 🤬


Peter

[Linked Image]

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