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peterself

Member

• Aug 4, 2025

• #1

Hi all - I have recently accquired a 1977 RRC 3.5 running and driving project with original Strombergs and hope someone can help me. I'm quite new to these and am mystified as to what this is and what it should be connected to if anywhere? The lower end comes from the LH carb and the open end does have vacuum when engine running. The ignition advance is connected seperately and works so it isn't that.

Many thanks.....Peter

 

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Henry_b

Think outside, no box required.

• Aug 5, 2025

• #2

Do you have a manual choke?

 

P

peterself

Member

• Aug 5, 2025

• #3

Henry_b said:

Do you have a manual choke?

Click to expand...

Thanks for responding yes, manual choke which works fine.

 

Henry_b

Think outside, no box required.

• Aug 5, 2025

• #4

Hmm I was thinking possibly something to do with an AED where does the vacuum pipe off of the bottom of it go to?

 

P

peterself

Member

• Aug 5, 2025

• #5

Will look tomorrow and try to take a picture - thought I read somewhere about vacuum control of air temperature - ring any bells?

 

P

peterself

Member

• Aug 5, 2025

• #6

Have just Googled further - it’s a fuel trap:

ERC2042L - Genuine Fuel Trap for V8 Carb and Series 3 2.6 Engines and Series 3 2.6 Litre

ERC2042L, genuine fuel trap for v8 carb and series 3 2.6 engines and series 3 2.6 litre for Series 3, Defender 90/110, Range Rover Classic, Land Rover Parts and Range Rover Parts

www.johncraddockltd.co.uk

Also seen in this video:

Will research more tomorrow…

 

kermit_rr

Very

Full Member

• Aug 6, 2025

• #7

Crikey that engine sounds rough.
Fuel trap. Ha! I can see why it's been left out of the fuel circuit, sounds like a nightmare

 

P

peterself

Member

• Aug 6, 2025

• #8

kermit_rr said:

Crikey that engine sounds rough.
Fuel trap. Ha! I can see why it's been left out of the fuel circuit, sounds like a nightmare

Click to expand...

Not my vehicle or video - just showing the same device on a similar engine!

 

kermit_rr

Very

Full Member

• Aug 6, 2025

• #9

peterself said:

Not my vehicle or video - just showing the same device on a similar engine!

Click to expand...

Yep i thought that was the case. It still sounds like a bag of broken nails!

 

norseman

Well-Known Member

• Aug 6, 2025

• #10

Never come across a 'fuel trap' despite owning four RRC's but then they have all been EFI
I have also owned a late 2.6 LR but that didn't have such a device, so I'm curious as to it's function.

 

kermit_rr

Very

Full Member

• Aug 6, 2025

• #11

norseman said:

Never come across a 'fuel trap' despite owning four RRC's but then they have all been EFI
I have also owned a late 2.6 LR but that didn't have such a device, so I'm curious as to it's function.

Click to expand...

Allegedly filters out water and crud. Sounds like it's fixing a problem that doesn't exist.
Yes you get water in petrol but I've never had it cause a problem. And regular filters/sediment bowls do a decent job

 

P

peterself

Member

• Aug 7, 2025

• #12

kermit_rr said:

Allegedly filters out water and crud. Sounds like it's fixing a problem that doesn't exist.
Yes you get water in petrol but I've never had it cause a problem. And regular filters/sediment bowls do a decent job

Click to expand...

Right, so if it’s drawing vacuum, then best just to block off the open spigot for now? Maybe tidy it up properly at a later date (!). Always more to learn…

 

kermit_rr

Very

Full Member

• Aug 7, 2025

• #13

peterself said:

Right, so if it’s drawing vacuum, then best just to block off the open spigot for now? Maybe tidy it up properly at a later date (!). Always more to learn…

Click to expand...

No clue how it actually works sorry, never seen one. If it were me I'd cut it out of the loop however needs and just have done with it. In my opinion. Probably