Fuel smell/leak!!?

4.2 V8 32v Naturally Aspirated - 414 bhp
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Lukes3
4th Gear
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Joined: Tue Dec 04, 2012 3:56 pm

Fuel smell/leak!!?

Post by Lukes3 » Sat Aug 30, 2014 7:41 pm

Alright guys, has any one had the smell of fuel coming from under the inlet manifold? Right side nearest to you if you looking at the engine. I have had the inlet manifold off twice trying to find/fix it. I have checked the pipes an changed all the injector seals an can still smell it. But cant see any wet/damp places once inlet is removed an cant test it obv when inlet is removed.
Any ideas?
Cheers.
Current-saloon rs4,Full decat Xpipe miltek,cold air feed,BMC air filter, TTS supercharged, MRC stage 3 L/C F/S,hell s+s brake lines,AP racing rotors + vagbremtechnic bells, kw v3s clifford 650mk2

Gone-audi s3 8p stage2+ with loba lo400 turbo.

Keiron3994
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Re: Fuel smell/leak!!?

Post by Keiron3994 » Tue Sep 02, 2014 12:27 am

It will be the metal fuel rail that the injectors push into they leak as there only spot welded .You can put all the fuel system back on the car with the inlet off and pressurize system up by turning the ignition on without trying to start the car and you will see the damp spots on the rail .I had the same problem hope this helps .

Lukes3
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Re: Fuel smell/leak!!?

Post by Lukes3 » Tue Sep 02, 2014 10:03 am

Cheers for the reply mate. I was looking at that thinking it could be that it must be such a small leak it just evaporates do qwick. And when i remove the manifold you loose the pressure from the rails so cant see it.
Ill connect the fuel back up an get some pressure back in it tonight
Cheers.
Current-saloon rs4,Full decat Xpipe miltek,cold air feed,BMC air filter, TTS supercharged, MRC stage 3 L/C F/S,hell s+s brake lines,AP racing rotors + vagbremtechnic bells, kw v3s clifford 650mk2

Gone-audi s3 8p stage2+ with loba lo400 turbo.

Lukes3
4th Gear
Posts: 657
Joined: Tue Dec 04, 2012 3:56 pm

Re: Fuel smell/leak!!?

Post by Lukes3 » Wed Sep 03, 2014 6:28 am

Just to let people know. I pressure tested the fuel rails an like what has been said the fuel rail was leaking around the union only spot welded in. Least fast it now
Current-saloon rs4,Full decat Xpipe miltek,cold air feed,BMC air filter, TTS supercharged, MRC stage 3 L/C F/S,hell s+s brake lines,AP racing rotors + vagbremtechnic bells, kw v3s clifford 650mk2

Gone-audi s3 8p stage2+ with loba lo400 turbo.

PritJutla
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Re: Fuel smell/leak!!?

Post by PritJutla » Wed Sep 03, 2014 9:39 am

How did you fix this? I have the same problem. Did you buy new fuel lines Do you have part numbers available

Lukes3
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Joined: Tue Dec 04, 2012 3:56 pm

Re: Fuel smell/leak!!?

Post by Lukes3 » Wed Sep 03, 2014 9:48 am

I can get you the part number of both if rails if you need them as mine is still in bits. I have had the union silver soldered as it only heled in by a few spot welds. Ill get pictures up once done
Current-saloon rs4,Full decat Xpipe miltek,cold air feed,BMC air filter, TTS supercharged, MRC stage 3 L/C F/S,hell s+s brake lines,AP racing rotors + vagbremtechnic bells, kw v3s clifford 650mk2

Gone-audi s3 8p stage2+ with loba lo400 turbo.

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CaptainLeadFoot
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Re: Fuel smell/leak!!?

Post by CaptainLeadFoot » Wed Sep 03, 2014 5:39 pm

I had fuel smell for a while and then it was the FSI fuel pump, it is hard to detect and i spotted it by accident when i saw smoke coming out from the bonnet...run a finger around the metal tip and see if any fuel smell from there, also there might be some minor stains on the cam cover.

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