Rand · Jul 11, 2016

So my 110 200Tdi with 110k miles has decided to sputter and stall in roundabouts.

If I enter a roundabout at normal speed it feels like I am running out fuel. The tank is full. The Defender starts and runs perfectly otherwise. And after it sputters to a stop in or just after the roundabout, it immediately cranks over and runs fine. If I enter the roundabout very slowly, I don't experience the same problem.

Any thoughts out there before I take her in to the garage? I am in the 06 region of France and a good Defender mechanic is hard to find.

Flossie · Jul 11, 2016

That is weird, I would check, clean, retightern the stop solenoid connection on the FIP.

ianc2051 · Jul 11, 2016

I'm not familiar in any way with the 200 TDI Defender but I would guess that the tank has a flexible breather pipe fitted on the upper face which is probably being crushed when you enter a roundabout as the vehicle body leans in sympathy to turning. If this is the case, the lift pump will be momentarily starved of fuel and ditto the engine. All theoretical I know but it might be worth considering.

Flossie · Jul 11, 2016

ianc2051 said:
I'm not familiar in any way with the 200 TDI Defender but I would guess that the tank has a flexible breather pipe fitted on the upper face which is probably being crushed when you enter a roundabout as the vehicle body leans in sympathy to turning. If this is the case, the lift pump will be momentarily starved of fuel and ditto the engine. All theoretical I know but it might be worth considering.

Won't be that for a couple of reasons.
It's unlikely it's my suggestion either but it's slightly more feasible, engine movement with loose connection type scenario.

Vinlander · Jul 11, 2016

Hang on. You're going round roundabouts the wrong way then, right?
My fuel needle dips when I go round a roundabout, but I'm going round the right way.
Fuel sloshing up on the right when you go left then. Afaik no fuel sedimenter on a 'fender, so got to be in the fuel filter. Drain and bleed it?

sp00k · Jul 11, 2016

Splutter would suggest fuel starvation to me. Could be that your fuel lift pump has failed. Can the engine cope with sustained high revs/load without dying? The injection pump will pull fuel though on it's own to an extent.

Rand · Jul 11, 2016

sp00k said:
Splutter would suggest fuel starvation to me. Could be that your fuel lift pump has failed. Can the engine cope with sustained high revs/load without dying? The injection pump will pull fuel though on it's own to an extent.

Yes, the engine can cope with sustained high revs. The thing runs perfectly except when hitting a roundabout at decent speed. As strange as it sounds, I don't think I have had more than a half tank of diesel in the two years I've owned it.... until now. This is probably the first time I've filled the tank. I wonder if that is a factor? This is strange!

Rand · Jul 11, 2016

Flossie said:
That is weird, I would check, clean, retightern the stop solenoid connection on the FIP.

I will try this.. thanks.

Rand · Jul 11, 2016

Vinlander said:
Hang on. You're going round roundabouts the wrong way then, right?
My fuel needle dips when I go round a roundabout, but I'm going round the right way.
Fuel sloshing up on the right when you go left then. Afaik no fuel sedimenter on a 'fender, so got to be in the fuel filter. Drain and bleed it?

I changed the fuel filter this morning thinking it could be the problem.....

nesponge · Jul 12, 2016

Change the lift pump on the side of the block if you have already tried the fuel filter.

You could also try blowing out the fuel lines with an air hose in case there is a blockage restricting flow.

IamRobbie · Jul 12, 2016

Strange fault but I'd also guess at a loose connection near the fip or fuel filter clogged up? Or you'll just have to turn into one of those folk who stop at a round about and wait even tho nothing is coming

Rand · Jul 12, 2016

I think I've resolved the problem through one of these three adjustments. The problem appears to have disappeared.

The two screws holding the fuel filter were very loose so I tightened them. I can't imagine this was the problem. (see photo)
The rubber cover of the wires leading into the tank had pulled off of the white plastic thing holding the wire. This is the leading culprit in my opinion. (see photo)
I cleaned and fiddled with the manual fuel lift and bled the filter again.

Thank you all for your suggestions.

Vincemcdonald · Jul 12, 2016

Had a similar problem with my old Disco.
Turned out to be a turbo hose at the end of its life which was sucking flat when I took my foot off the accelerator. It mainly happened when approaching a roundabout at high(ish) speed as this is when the turbo discharge pressure will be at its minimum.
And of course, when the engine is turned off, the hose pops back to its normal size so hiding the problem.
For a quick test of this, disconnect the inlet manifold hose so turning the engine into a naturally aspirated diesel, then take it for a (slightly smokey) test drive to see if the fault has gone.

Rand · Jul 12, 2016

Vincemcdonald said:
Had a similar problem with my old Disco.
Turned out to be a turbo hose at the end of its life which was sucking flat when I took my foot off the accelerator. It mainly happened when approaching a roundabout at high(ish) speed as this is when the turbo discharge pressure will be at its minimum.
And of course, when the engine is turned off, the hose pops back to its normal size so hiding the problem.
For a quick test of this, disconnect the inlet manifold hose so turning the engine into a naturally aspirated diesel, then take it for a (slightly smokey) test drive to see if the fault has gone.

This is a good one for me to look at if the problem returns.... many thanks.

Flossie · Jul 12, 2016

Rand said:
I think I've resolved the problem through one of these three adjustments. The problem appears to have disappeared.

The two screws holding the fuel filter were very loose so I tightened them. I can't imagine this was the problem. (see photo)
The rubber cover of the wires leading into the tank had pulled off of the white plastic thing holding the wire. This is the leading culprit in my opinion. (see photo)
I cleaned and fiddled with the manual fuel lift and bled the filter again.

Thank you all for your suggestions.

It's non of them I'm afraid...

Rand · Jul 12, 2016

Flossie said:
It's non of them I'm afraid...

And you are correct sir! As the problem has resurfaced...

Flossie · Jul 12, 2016

The turbo hose trick sounds like the next plan then.
Or maybe your Landyzone is a brexit Landyzone and doesn't want to be in the EU anymore

Flossie · Jul 12, 2016

Bluddy spell checker!
Landy..

Flossie · Jul 12, 2016

Did you check the FIP solenoid connection, I'm not sure you did, lift pump is not the FIP....

Riich · Jul 12, 2016

A leaf in your fuel tank? Seen this sort of thing on tractors, its floating around near the pick up in the tank, then as the fuel shifts to one side so the leaf gets sucked onto the pick up

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