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[JamesV6CDX]

Well if it can't blow up a rubber glove then what's happening to all the exhaust? the back pressure must be incredible.

Oh I agree for sure, it needs to be sorted before it can be used on the road.

I'm just struggling to link it to the fuel issue, though  :-/

[tidla]

assumption is the mother of all...

they may well be seperate issues.

both detrimental to fuel comsumption. :-?

[hoody]

Is the fuel filter fitted the right way?

[Marks DTM Calib]

Sod the exhaust at the moment..........the NUMBER 1 issue to fix is the fuel leak....so now the cover looks ok, check the pipes and fuel filter, is the filter new and ok (I have seen them that old that the side rots out on them!).

Now you know the real reason why the consumption was bad.....its pissing it ll over the road

[I_want_an_Omega]

Are the fuel flow/return lines connected the right way round to the inlet manifold? Would it make any difference if it were wrong?

[Andy H]

Are the fuel flow/return lines connected the right way round to the inlet manifold? Would it make any difference if it were wrong?

If they were back to front then the pump would have to push the fuel the wrong way  through the pressure regulator & then into the fuel rail. Once there it could flow straight back to the tank so there would be no pressure at the injectors. I don't think the engine could run at all TBH

[Psychoca]

Sod the exhaust at the moment..........the NUMBER 1 issue to fix is the fuel leak....so now the cover looks ok, check the pipes and fuel filter, is the filter new and ok (I have seen them that old that the side rots out on them!).

Now you know the real reason why the consumption was bad.....its pissing it ll over the road

Is it possible that the fuel leak and the exhaust blockage are related?  As has been pointed out the back pressure has to be immense and will need to vent somewhere...   Could it be pressurising the fuel return pipe, perhaps rupturing that?

[JamesV6CDX]

Sod the exhaust at the moment..........the NUMBER 1 issue to fix is the fuel leak....so now the cover looks ok, check the pipes and fuel filter, is the filter new and ok (I have seen them that old that the side rots out on them!).

Now you know the real reason why the consumption was bad.....its pissing it ll over the road

Hi Mark,

Filter and it's connections checked - all bone dry.

It's coming down from the top of the tank, and seems to be running down the back.

Appears to be a fuel spray everywhere in that area.

Any pipes in that region? Guessing tank needs to come off!!! ?

Mark, do you think the exhaust blockage and fuel leak are unrelated?

Edit - just to add to the chaps above - the connections at manifold cannot be wrong, as one is 17mm, one is 19mm, for that reason

[Sixstring]

'Kin Ell James........four wheel grenade??

PO MUST have known all about this.........??

[Kevin Wood]

Is it possible that the fuel leak and the exhaust blockage are related?  As has been pointed out the back pressure has to be immense and will need to vent somewhere...   Could it be pressurising the fuel return pipe, perhaps rupturing that?

Can't see how pressure in the exhaust would be able to make its' way to the fuel tank. :-/

Has to be a fuel leak between tank and fuel rail, IMHO.

Get it idling and give the whole length of the fuel plumbing a good waggle. I suspect there's a leak which only opens up when stressed in one particular direction.

No need to drop tank, IMHO. If it's spraying out as you say, it can only be from the connections at the top plate of the tank or the plumbing between there and the fuel rail. All accessible with tank in-situ.

Does make me wonder if the high pressure line from the pump is leaking under the fuel tank top plate as this is the only thing I can think of that might have been responsible for the fuel mist in the tank.

Kevin

[JamesV6CDX]

'Kin Ell James........four wheel grenade??

PO MUST have known all about this.........??

Possibly mate, but it's by the by really..... just need to get it sorted

[Andy H]

Is it possible that the fuel leak and the exhaust blockage are related?  As has been pointed out the back pressure has to be immense and will need to vent somewhere...   Could it be pressurising the fuel return pipe, perhaps rupturing that?

Can't see how pressure in the exhaust would be able to make its' way to the fuel tank. :-/

Has to be a fuel leak between tank and fuel rail, IMHO.

Get it idling and give the whole length of the fuel plumbing a good waggle. I suspect there's a leak which only opens up when stressed in one particular direction.

No need to drop tank, IMHO. If it's spraying out as you say, it can only be from the connections at the top plate of the tank or the plumbing between there and the fuel rail. All accessible with tank in-situ.

Does make me wonder if the high pressure line from the pump is leaking under the fuel tank top plate as this is the only thing I can think of that might have been responsible for the fuel mist in the tank.

Kevin

Just a thought but

Do the fuel pressure regulators ever fail?

Could a failed or blocked (or tampered with) fuel regulator be causing a ridiculously high pressure in the fuel line leading to excessive fuel consumption and leaks in the fuel lines?

Is there a test connection on the fuel rail for a pressure gauge?

[Kevin Wood]

Just a thought but

Do the fuel pressure regulators ever fail?

Not common but not impossible.

Could a failed or blocked (or tampered with) fuel regulator be causing a ridiculously high pressure in the fuel line leading to excessive fuel consumption and leaks in the fuel lines?

I wouldn't expect the engine to run normally, and I would expect the plumbing to stand up to the highest pressure the pump can deliver but it's possible.

Is there a test connection on the fuel rail for a pressure gauge?

Yes, there's a schrader type valve at the rear of the fuel rail.

Kevin

[JamesV6CDX]

Hi Kev,

I still think the tank may actually need to come off :-/

Thing is, with it idling, even when you can see fuel piddling on the ground, the inspection area in the boot is bone dry.

It seems to be running down the very rear of the tank, bumper side, from the top. There is some sort of pipe up there too, can’t see what it is, though…

[Andy H]

I wouldn't expect the engine to run normally, and I would expect the plumbing to stand up to the highest pressure the pump can deliver but it's possible.

Is it running normally :-/

I'm half convinced by the theory about a spray or jet of petrol inside the tank(maybe as a result of excessive pressure) finding a weak point in a tank seal somewhere.