Power loss when cold

S*it in the filters?

Thicker (cold) oil can't get through, when warm is less viscous so flows more freely, maybe.

Is it best to do this on the bench or can it be done in situ?

;-)

Lee D

Diagnosis, or recommendation for cure? :o)

On or around Wed, 31 Jan 2007 23:49:25 -0000, "Dr_D" enlightened us thusly:

I'm bloody sure *I* couldn't do it in situ.

are you on biodiesel?

There is a temp sensor on the head, about half-way along. dunno what it does, though, on a non-ecu one.

Check the hoses to the intercooler, particularly the elbow below the turbo. Is the turbo a bit noisy - as in whistling? If so check the aforementioned hoses for air leaks. It sounds like the induction manifold may be taking a while to get to pressure.

Richard

A trick worth trying when you start is to wait for the heater plug light to go out pause for about 20 secs and set the heater plugs on again then try to start just possible that the plug loom isn't getting enough current. bad earth etc Derek

In news:T1axh.68793$ snipped-for-privacy@newsfe3-win.ntli.net, Derek wibbled :

Maybe tired/dead glowplug(s)?

Normal diesel, I have been using BP ultimate recently, it does give more power, smoother running and a few more mpg, despite it's higher price. Had a quick look today but can't see a sensor on mine, also checked the turbo hoses as best I could, all clips are tight except the bottom one which I couldn't get a scewdriver on but I suppose the intercooler could have a hole in it. I'll have another go at the lower clip when it gets a bit warmer, it was minus 4 today!

Others have suggested glowplugs, but there's no problem starting, so I don't think it's them, but I could change 'em anyway.

Funny enough, the problem seems to be very slowly improving, especially if I run it at 1500-2000 rpm down the lane before hitting the main road. It was previously used just for school runs and the idea of the turbo being full of crud would fit. It's had five oil changes since I've had it though.

I'll keep trying. Thanks TonyB

I have the very same Disco and mine's also very sluggish when cold - have checked everything - even cleaned our intercooler. I think the sluggishness is all part & parcel of the engine type - so I leave the engine on tickover for 5 minutes or so before setting off in the morning and this helps a lot - also saves wear on the engine.

Tony

Thanks Tony,

What an odd thing. The 200Tdi that I had previously didn't do it at all. TonyB

Hi Tony, is it manual ot auto?

Sounds to me like this is the classic problem caused by the timing belt stretching, which results in both the injector pump and camshaft being retarded. Being retarded, and being cold, the engine is under-performing, but as it warms up it is able to cope better with the retarded timing.

I've seen this a lot in the 300 Tdi engines prior to fitting the Zeus gears, and it disappears with the gears being fitted. The only difference before/after is the timing of the injector pump and camshaft with respect to the crankshaft.

Cheers

Phillip Simpson

PS I look after the Zeus gears in Australia, so do have a commercial interest in them, which I declare, but also have seen a lot of 300Tdi engines significantly improve in their performance and economy. Check our website for a dynometer study on this issue

On or around Fri, 09 Feb 2007 07:59:24 +1100, Phillip Simpson enlightened us thusly:

I improved our 300TDi by advancing the pump timing a bit.