300TDi can't go up hills

Felix · Mar 22, 2010

Hi

Recently removed the EGR valve and blanked the top hose from the intercooler. Also replaced the water pump and PAS pump. On a trip to the lakes last week began to loose power on a big ascent on the motorway doing about 75 dropping to less than 50 with my foot on the floor. After that seems to lack power until you stop for a few minutes then its ok again.

Stopped and had a look under the bonnet everything seemed ok. No water lose and engine sounded like it was running ok.

Took top hose off and it had a lot of oil in it. (before it was oily up to the point the recycled exhaust gasses dried it from the EGR valve). I don't think the oil is coming from the turbo but from the emissions pipe that feeds into the air intake.

So any ideas why the lose of power? I plan to take off the intercooler and clean it out.

Its the EDC version of the engine as well. Could the ECU be being confused by something?

F.

rollin danny · Mar 22, 2010

Have you cleaned the sedimenter recently? Jelly substance forms in it and can move around blocking your fuel supply when under load.

Felix · Mar 22, 2010

It all looks a bit corroded around the sedimenter was trying to avoid it

Any idea if they are difficult to remove?

F.

j_rov · Mar 22, 2010

easy peasy, just need a spanner (11mm iirc).

You can get to it without jacking the car up, but wear goggles as you'll get rust in your eyes otherwise.

Undo bolt, withdraw while holding the cup part, then give it a tap to release the seal. Careful as you might get a mouthful of diesel!

Clean and refit.

You are supposed to replace the seals, but i didnt and have no leaks.

MrPDude · Mar 22, 2010

Thanks for the tip on the sedimeter, i was looking at getting it, but unsure if i could do it without raising car. i need a sliding trolley!

goonarmy · Mar 22, 2010

int a red one is it?

Richard Martin · Mar 22, 2010

If cleaning the sedimentor doesn't help then think about changing the fuel filter, lift pump and air cleaner filter

Felix · Mar 23, 2010

Disconnected MAF last night on the way home. It made frog all difference. Is it supposed to? I had it off while is was doing the pump.

Felix

Paul D · Mar 23, 2010

Felix said:
Disconnected MAF last night on the way home. It made frog all difference. Is it supposed to? I had it off while is was doing the pump.

Felix

No difference from a disconnected MAF means you need a new MAF as it isn't working. I'd also check any associated wiring, see if it isn't chafed or only loosely connected.

Felix · Mar 23, 2010

Is there any way of testing it electricaly?

shocker · Mar 23, 2010

I can only say that I sympathise.....I am having endless trouble with EDC vehicles.Oh,sorry to be ignorant but in this sea of initials,what does MAF stand for?

Richard Martin · Mar 23, 2010

Mass AirFlow Sensor (MAF)
The MAF is a key engine sensor that detects the volume of air being drawn into the engine
...if only we could all use Google...

shocker · Mar 23, 2010

Richard,Richard,richard.....if my question irritated you so much,why answer it?Thank you for doing so by the way.It may just be that I prefer to discuss with other forum members than go to google.

Pikey · Mar 23, 2010

shocker said:
.It may just be that I prefer to discuss with other forum members than go to google.

Ya wanna talk to this lot??

Jeez you need help you do

:bolt:

Richard Martin · Mar 23, 2010

shocker said:
Richard,Richard,richard.....if my question irritated you so much,why answer it?Thank you for doing so by the way.It may just be that I prefer to discuss with other forum members than go to google.

It didn't irritate me at all, if it had I would have ignored it

.

diver · Mar 23, 2010

Turbo hoses delaminating internally? Easy check

rollin danny · Mar 24, 2010

diver said:
Turbo hoses delaminating internally? Easy check

If it was turbo hoses you would get clouds of black smoke with the power loss.

Felix · Mar 29, 2010

Ok.

Cleaned out sedimenter. Replaced all turbo hoses. Couldn't get intercooler off as the fan cowl was in the way and had no way of getting the fan off.

Went for a drive and same thing happened under acceleration on the motorway lost all power and down to 45MPH.

Symptoms seemed to be like waste gate was opening and not closing again.

Still, got around to doing a job that had been putting off cause the wife had been like "have you checked the air filter" and what would she know and found this :-

Guess the filter had been sucked into the air intake when the turbo was on full suck. So I suppose the turbo is ok then.

F.

MrPDude · Mar 29, 2010

Well.... I dunno what to say to that!!!

Let us know how it feels after changing it. Surely air filter was one of your first checks?

At least your Turbo ain't knackered mate. Hope replacing that solves ur issues. Your maf sensor weren't working cus there was no air flow to sense lol

Felix · Mar 29, 2010

Yea that has fixed it. Drives like a dream now. Well best it can for an Auto.

Don't remember the last time I could do 80+ on the motorway.

F.

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