"Cooler pump for the injection unit" - anyone know what this is?

[gar074]

I posted this query in the DS3-R thread yesterday, but I'm reposting it here in case the THP experts missed it over there.

According to my dealer, my chronically underpowered, misfiring THP "needs a new cooler pump for the injection unit" (this diagnosis arrived at after lengthy discussions between said dealer and Citroen UK).

"Cooler pump for the injection unit". Anyone care to hazard a guess what that might refer to?

[Owd git]

they mean a much better looking one of course! - polished alloy and so on

no seriously that's got me beat - there's no mention of an injection cooler pump in this on t'internet....download here

Direct gasoline injection for even more power.

Mounted at the rear end of the intake camshaft, the mechanically driven two-piston high-pressure pump delivers fuel to the injection valves via a stainless-steel distributor rail. These high-pressure valves inject fuel directly into the combustion chambers from the side at a pressure of up to 120 bar, in the process maintaining a homogeneous distribution of the fuel/air mixture in the combustion chambers.

At a compression ratio of 10.5:1, the turbocharged engine is compressed to a relatively high level for an internal combustion engine of this type. Precisely this is why the combustion process is monitored also in this case by anti-knock control correcting the ignition angles and charge pressure whenever required.

[ZACK]

Dealer Lying To You...

[gar074]

no seriously that's got me beat - there's no mention of an injection cooler pump in this on t'internet....download here.

Many thanks for the links - confirms my view that it sounds like bs

[gar074]

Dealer Lying To You...

But why would they? They've no reason to hide the nature of the fault - unless they're using the delay in getting the replacement "cooler pump" as a ruse to buy more time to find out exactly what's wrong with it? Surely not!

[Stanly]

In all my years in the motortrade (lots of different makes) I have never come across a injection cooler pump on a petrol fuel car, as said before sounds like bs and dealer stalling for time.

It's nearly as bad as I once heard a tech say to a customer that the reason his lhd car was pulling to the right was the
due to the left hand drive tyres he had fitted.

[gar074]

Hot News Update - the dealer says that the turbo on the THP is water-cooled by an auxiliary water pump, and that one of the fault codes indicated that the said pump was malfunctioning, so it had to be replaced.

And it was. And guess what? It made no difference whatsoever.

Further update here:

http://ds3club.co.uk/showthread.php?...wer-loss/page3

[Owd git]

Hot News Update - the dealer says that the turbo on the THP is water-cooled by an auxiliary water pump, and that one of the fault codes indicated that the said pump was malfunctioning, so it had to be replaced.

And it was. And guess what? It made no difference whatsoever.

Further update here:

http://ds3club.co.uk/showthread.php?...wer-loss/page3

it'll be one of these then - no wonder it made bugger all difference

Maximum exhaust gas temperature is monitored by the electronic engine
“brain” and is limited to 950 °C (1,742 °F). To prevent excessive build-up of
heat in the oil- and water-cooled turbocharger after the engine has been
stopped, an additional electrical water pump starts automatically as soon as
the car comes to a standstill, dissipating any excess thermal energy from
the system.

[Villanyi]

I've got that thing changed in my car 3 times -.-