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K9K 1.5 DCi - Down on Power

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apmcook View Drop Down
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Joined: 03áDecá2013
Location: Fareham
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    Posted: 18áFebá2018 at 12:42pm
Hi Guys 
Drove my wife's' Qashqai for the first time for ages the other day only to find it had very poor acceleration and if it were a petrol I'd say it also had a misfire associated with a bad plug - and only happy to trundle along the motorway at 70 ish and at 2-3k rpm.
(Why is it they then say - yeah been like that for a while now!!)

Any how.. checked replaced the air filer - replaced the MAF - and dismantled and cleaned the EGR assembly - it was not too bad TBH. Put it all back together and test drove - ran slightly better but still no great acceleration - noticed that when accelerating hard (foot to floor) it did smoke quite badly. 

I have noticed in dismantling the air inlet hose (from the air cooler) that fits to the where the boost sensor is located and on through the accelerator housing is quite oily Unhappy - which indicates (to me anyway) that I'm looking at a potential Turbo issue? 

EGR - I was going to block this off but I have welded assembly so have given up on that idea. 

I have some codes (using EOBD Facile) which could be influencing each other - 
P0110-75 - Intake Air Temperature - Circuit Malfunction (Bank 1 Sensor 1) 
P2263-49 - Turbocharger / Supercharger Boost System Performance
P0381 Glow Plug/Heater Indicator - Circuit Malfunction
and some more MAF instances

The car is a 2010 model and has just clocked over 210k miles 

Any help in further diagnosis would be greatly received and appreciated - 

...next question is probably going to be how easy / hard is it to replace the turbo under home workshop conditions 

Cheers
Paul



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