Thread: Under powered 300tdi - please help

Just a long shot , but If you are getting loss of Power , I would check
Fuel Sedimenter for sludge and give it a thorough clean.

No mechanic I am, but I heard that the turbo hose can colapse inside (outside looks fine) and that could give you some grief...

I had exactly the same sluggish symptoms on my 200. I have just added some injector cleaner (wynns) to the tank and that has made a noticeable difference.

Will see if this is a long term or short term fix.

Originally Posted by sam.thompson07

Hey guys
Just really started to notice my 300 tdi disco has become considerably underpowered. Only had the car for about 3 months and up until last week i never really had anything to worry about.
Its a 97 manual tdi and i had the clutch replaced last weekend. The last few days getting off at the lights and up driveways its so underpowered. Some steep driveways i will almost stall if i am not reving the guts out of it. I have even put it into low range on some. Once im doing into second then im off and away but its reallt noticable pulling off from a curb on a slight incline.

I didnt really notice it untill i got it back from the mechanic who did the clutch.

I was really just wanting to see if anyone has experienced this problem, obviously something is wearing out pistons maybe ? i dunno but its giving me the tom tits!!

Oh well hope that someone can let me know whats going on
Cheers

Sam

Hi Sam,

How did you go with this problem? I am having a similar problem with my '98 300 TDi Disco. It's got nothing until the turbo kicks in at about 1500-2000 revs, then its away.

I have had the car for a couple of years and it seems to have gotten considerably worse in the last few months. I have recently had the diesel injector pump replaced. This has resolved a few other issues but has only served to highlight the low revs power problem. I have previosuly had a power output problem due to fuel blockages from dirty diesel but this tended to be evident through the entire rev range.

A mate from work thinks it sounds like a dodgy EGR valve, though I have read conflicting reports on whether the 300 TDi actually has one (and haven't been able to identify one under the bonnet myself - not really sure what to look for?)

Any ideas?

Cheers

Tim

Originally Posted by wheresthedog

Hi Sam,

How did you go with this problem? I am having a similar problem with my '98 300 TDi Disco. It's got nothing until the turbo kicks in at about 1500-2000 revs, then its away.

I have had the car for a couple of years and it seems to have gotten considerably worse in the last few months. I have recently had the diesel injector pump replaced. This has resolved a few other issues but has only served to highlight the low revs power problem. I have previosuly had a power output problem due to fuel blockages from dirty diesel but this tended to be evident through the entire rev range.

A mate from work thinks it sounds like a dodgy EGR valve, though I have read conflicting reports on whether the 300 TDi actually has one (and haven't been able to identify one under the bonnet myself - not really sure what to look for?)

Any ideas?

Cheers

Tim

Australian 300Tdi didn't require EGR.

On the top of the exhaust manifold, near the turbo flange, you should see a flat oval shaped plate, fastened to the manifold by 2 screws. This plate blanks off the EGR port on Aus 300Tdi's.

Adjust valve/tappet clearance, check injection timing, check boost pressure and anything else suggested above.

Thanks John,

Will let you know how I go.

Cheers

Tim

Originally Posted by ssv8pilot

I had exactly the same sluggish symptoms on my 200. I have just added some injector cleaner (wynns) to the tank and that has made a noticeable difference.

Will see if this is a long term or short term fix.

Even my Wynns Rep at work recomends Diesel power over their injector cleaner for diesels.

His words were......"Ours doesnt work as good as one called Diesel power, I cant sell it to you but you can get it down the road".

Their Grease is brilliant though

I'd put $ on throttle cable adhustment, they probably lifted the motor out to do the clutch.

I know this might sound really stupid.....BUT.....check your tyre pressure, at one stage my 300tdi disco felt really really sluggish off the line. We wondered what it could be and then I checked my tyre pressure.

Although still up there I think they were 28/30 I was running 38 at one stage knocked them up to 35 and the car went like a pocket rocket....it just felt like I was draggin flat tyres around....

sorry this one is a long shot, and not really aimed at the low rev's climbing hills only the others claiming the slugishness

oh and x2 to the throttle cable......and then to the turbo hose delaminating on the inside