Loss of power ?

[reallyoldian]

I hope someone can help advise as my mechanic cannot I have a mk7 2.4 tdci which normally runs like a dream. no smoke starts great etc ,lately its been losing power after about 20 miles its like there is no turbo most noticeable going up hills ,turn it off then start it runs great for 20 ish miles then same again , changed fuel filter and air filter ( wishful thinking ) no difference ,Mechanic put it on his computer thingy no codes ! ,Any advice would be greately appreciated or if anyone knows a good transit mechanic near Durham !

[knobby1]

Any DTC lights on the dash..?? Do you know what code reader was used..?? Some readers struggle with the Transit protocols.

I'm guessing the EGR valve is not happy.

Lord Knobrot

[amlav]

It could be also the venting hole on the fuel filler cap blocked and creates a vacum in the fuel tank .

[Stumble]

Might be worth cleaning the map and maf sensors -maybe the egr needs doing too

[reallyoldian]

Hi ,thanks for the replys , No lights on the dash there was a spanner one a couple of weeks ago which i cleared ,just got back from a 30 mile drive did not misbehave at all
I will get the egr looked at , are the ones you get off ebay any good ?

[knobby1]

Hi ,thanks for the replys , No lights on the dash there was a spanner one a couple of weeks ago which i cleared ,just got back from a 30 mile drive did not misbehave at all
I will get the egr looked at , are the ones you get off ebay any good ?

There's two types, go for this one..:

https://www.ebay.com.au/itm/EGR-Valve-f ... ect=mobile

There is also a water cooled and non-water cooled....check to see which you have before buying.

Lord Knobrot

[2016Custom]

Could be getting air into the fuel line perhaps?

[reallyoldian]

Turned out to be a fuel valve ! Runs like a dream now

[knobby1]

Turned out to be a fuel valve ! Runs like a dream now

Fuel valve..?? Please explain.?

Lord Knobrot

[Stumble]

SCV I bet

[reallyoldian]

Hi Sorry for delay it was IMV valve .

[knobby1]

Hi Sorry for delay it was IMV valve .

So the SCV. Did you do a full set of learns after fitting the new valve..?

Lord Knobrot

[reallyoldian]

Hi ,the garage did the lot , Van runs great they also removed the 70mph restrictor , only for France I would never speed here ! The only time that happens is when everyone is locked up or should I say down ?