It could be: a boost leak damage compensation diaphragm split hoses at numerous locations weak actuator sticking actuator I'm sure there are some I've missed. Hence it's not a straight forward diagnosis.

Low boost could be many things, I have simply diagnosed the outcome and not the fault.

Yes I am checking it correctly. I am testing it under load and I would be lucky to get up any incline in 4th as speed drops off like you wouldn't believe. I've got it booked in a LR centre on the 23rd for diagnosis of the fault.

I'm just in the process of trying to identify the root cause of my sluggish 300tdi. I've recently fitted a boost gauge that has confirmed my initial thoughts that it was not boosting as it should. I'm in the process of looking for any boost leaks and thought I would look on the internet at...

Do you think the following part comes with replacement banjo washers also or not? https://www.lrdirect.com/ERR4699-Pipe-Turbo-Control-Def-300Tdi/?sfi=Err4699&keep_https=yes

Has anyone done away with the viscous fan on their 300TDi and not bothered fitting an electric fan? Just wondering how necessary the viscous unit is on the 300TDi as I'm sure I've read somewhere that they aren't really required unless the vehicle is used under heavy load i.e. towing etc.

Whats a boost pin?

I suffer from similar issues. Check your lift pump. What boost are you achieving? Do you have any boost leaks? Check the diaphragm isn't split inside the boost compensator on your fuel pump. I fitted a boost gauge and identified that I'm only producing .4-.5 bar boost max. I think I have a...

Cooper Discoverer STT for me. Reasonably priced and proven to go everywhere all others have gone with more expensive boots.

Tried looking for potential boost leaks today to no avail. However, I did notice that most of the fins both on my radiator and intercooler were missing so I decided to purchase replacements today. I'm thinking that the loss of boost could well be a result of my corroded intercooler. Hopefully...

If I didn't have cause to think that there was a problem I would agree but I don't think it is necessary given that performance is way down. It literally confirms my thoughts.

How would i know if it was partially open?

I have had concerns over the poor performance of my 300 TDi. I have changed lift pumps etc to no avail. So I decided to fit a boost gauge and guess what......I'm only seeing .4-.5 bar boost pressure under load. I have checked my turbine and there is a tiny bit of vertical play and minimal...

Do you know what the ID of the actuator hose is? Need to make sure my tee is the correct diameter prior to making the cut!!!! ;)

I have seen a number of different location where owners have tapped their t-connections into the boost system: a) Between actuator and turbo b) Between turbo and fuel pump boost compensator Will both provide the same readings? My thoughts are yes but thought I'd seek clarification before I...

Does anyone know the replacement part no for this item???

What's the cost for a replacement set of new injectors?

Are these serviceable items or do you wait for them to fail prior to replacing?

The issue I have is that there is a distinct lack of pull especially going up hill the speed sharply drops off. I have checked the lift pump and all would appear well. However, the turbo also leaks oil as already discussed but it also makes a higher pitched noise than it used to. All boost pipes...

Performance has dropped quite significantly recently and feel my turbo has had it's day. When I did the timing belt I noticed a lot of oil in the boost pipes post turbo so presume the seals have gone. I also noticed upon removing my radiator that most of the fins on my radiator/intercooler were...