Car Problem - Diesel - Lack of power

[Chriss]

Hi all,

I've recently acquired a Mondeo TDDi. Everything's good with it except one major problem, it's down on power. It still drives, except where I would expect the turbo to kick in, there's nothing.

I've been told it could be the turbo, the waste gate or the diesel pump.

Anyone advice me how I could diagnose which of these it's likely to be? I know nothing about the practical side of diesel engines and even less about a turbo.

Thanks
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TheShaggyDA: I've got 3 or 4 pairs that predate my wife, so at least 11.5 years old.

[UnknownStuntm...]

Wind the window down when you drive it. Put it in 2nd or 3rd, at low speed and put your foot down. If you can hear a whistling noise about 3k rpm it's a hole in the boost pipe (or most likely a fuggered clamp holding one end on).

[Chriss]

I've heard that's a common problem, but I can't hear any strange noises. A big problem I've got is this is my first four cylinder car in four years so it sounds weird to me anyway.

Any idea how I would tell if any of the three parts listed aren't working?
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TheShaggyDA: I've got 3 or 4 pairs that predate my wife, so at least 11.5 years old.

[MarJay]

There are common issues with various vacuum hoses coming loose or the turbo boost pipe becoming disconnected or holed.

I'd have a look under the bonnet and see if you can see any rubber hoses (large or small) which are out of place.
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[Livefast123]

There are a number of issues with the TDDi's but they are not as bad as the TDCI's.

Leaks from the turbo boost hoses
Wastegate problems
Turbo vanes sticking ( if variable vane turbo fitted)
Mass Air Flow sensor faulty
Exhaust Gas Recirculation valve blocked / Faulty

Try here https://www.fordmondeoownersclub.co.uk/
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Current ride - Yamaha MT-07

[Gazdaman]

I've got a TDCI and it just cost me £750 for 4 new injectors.
They use Delphi injectors, which have a life span of about 60k miles. So you could be looking at dodgy injectors.

Does it ever cut to 'limp mode'? i.e the glow plug light flashes and you're down on power.

I'd say a boost hose has probably popped off the turbo, so you've got no boost.

Gaz

[Livefast123]

Can you hear the turbo spooling up if you rev it?

I don't think the TDDI's had the dodgy injectors, but do you have lots of black smoke coming out the back?
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Current ride - Yamaha MT-07

[Chriss]

[Gazdaman]

The turbo should kick in about 2k, but the TDDI's aren't spectacularly quick is it definitely down on power? Have you felt it with more power in the past?

Gaz

[ozzy r6]

what reg is the mondeo as i use to work for ford, there are a number of common problems with these vehicles,

split turbo hoses (you would hear it if there was a split hose)
turbo bearings failing (again you wouold hear this )
the common injector problems
fuel pump faults
slave pump faults (this is the pump that sits next to the tank older cars)
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yamaha r6 5sl

[kal9001]

Im no mechanic, but if hes saying he cant hear the tubo spooling at all its got to be the turbine side not the compressor side. So something to do with the wastegate or the manifold. Could the entire turbo be seized?
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Anyone stupid enough to think we will drag a load of wooden horses full of soldiers into our city is certanley stupid enough to drag all of ours into theirs!

[Gazdaman]

[Chriss]

[Chriss]

I'll have a look when the wife gets home tonight! Chris, when you say what sort of injection it runs, do you mean common rail or direct into the cylinder? If so it's direct into the cylinder and not common rail.

Thanks!

Quick question though, can someone explain why the diesel pump gets involved in the turbo separately to the injection?
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TheShaggyDA: I've got 3 or 4 pairs that predate my wife, so at least 11.5 years old.

[ozzy r6]

your car will have a wastegate type turbo on it the easy way to tell if your turbo is siezed just remove the pipe that comes from the air box to the turbo you should just be able to get your hand into the turbo and see if it spins, (but sayin that i have never had a turbo on a mondeo sieze up)

they normal snap the shaft and you can check this the same way, the impeller on the turbo should only have a little movement in it so you can check that.

but to me it sounds like you have a split pipe and most likely the hose from the intercooler to the EGR valve
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yamaha r6 5sl

[ozzy r6]

[Chriss]

I'm still struggling with this!

Would the turbo create boost when revving in neutral? My current idea is to unplug the intercooler and see if there's pressure coming out there... Is that a silly idea?
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TheShaggyDA: I've got 3 or 4 pairs that predate my wife, so at least 11.5 years old.

[Chriss]

Bwahahaha. I love that idea, if for nothing else, to look uber chav in my 90hp Mondeo Estate.
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TheShaggyDA: I've got 3 or 4 pairs that predate my wife, so at least 11.5 years old.

[P.]