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megane 1.5dci k9k636 injector

12K views 20 replies 5 participants last post by  efkas 
#1 ·
Megane 1.5dci 110bhp 2012yr. k9k636. Had rough idle, poor mpg, cold start stalling been told by mechanic its injectors, replaced injectors with same part number as original. Idles now well no stalling or rough idle, everything works well except lack power and still poor mpg. Did diagnostics, had few faults, deleted them, still no improvement. I have read before that some needs programming, but mechanic says siemens injectors doesnt need programming. Is it possible to program this so to my ecu? Before it would have 70mpg on motorway , after injectors started to fail went down to 38-44 mpg, and after replacement its still same..
Every answer will be appreciated becouse now i trully dont know what to do..
 
#4 ·
my mechanic tried coding them but he was unable becouse after puting numbers in its says it failed and contact tech support or something, he used maxisys or similiar diagnostics tool. Maybe you know what software or diagnostics tool to use to code them?
 
#6 ·
Programmed them in, everything went fine, but engine still low on power and poor mpg. Basically nothing changed, mechanic suspected EGR but, on computer it works, shows numbers. He suspects MAF. Any chances it might fail without showing fault?
 
#8 ·
no, but if i have, what problem might be? btw i use car daily 50-150miles a day. And it started gradualy when i replaced all filters,oil and cambelt(106k mileage), every day it went worse until i changed injectors, started to idle well and sound normal, but not pulling and mpg shait.(now 111k)
 
#10 ·
no smoke at all, used to smoke white smoke while cold engine with old injectors. And injectors where from crashed car with 5k mileage, even mechanic tought they were brand new. It is working like it suppose to do but feels like something would hold while accelerating, i used to have passat with limping turbo, it is feeling similiar. Only strange thing that when you accelerate hard it sounds a bit stupid when i release accelerator, didnt used to do. Im thinking to put back my old injectors and try if it pulls the same, becouse my mechanic just points stuff that suppose to fail with this mileage like egr and dpf.. but im pretty sure they work fine, even checked on computer it shows numbers it suppose to show
 
#14 ·
YEs it has, only model of 1.5dci which comes with dpf 110bhp.
Tried today checking MAF sensor if it does anythithing, becouse my friend told me if you disconnect it and try runing, and it feels same, might be bad MAF sensor.
Disconnected, got 3 faults imeadetely, check cruise control, check injection, check anti pollution system. tried running and driving, basically felt same. Connected back, all faults dissapeared and tried one more time, disconnect and connect just to double check. Now i have Check anti pollution system fault all the time. So i think this is clogged dpf, becouse poor mpg and feels in limp mode. And when i bought this renault i used injector cleaner, i suspect it lifted all the **** from diesel tank clogged injectors, while injectors were clogged it used to smoke like hell with white smoke, and smelled like acid(as i think dpf and catalysator cleaned fumes) and this clogged dpf, and i just wanted to clean all the ****.
So how do you guys think do i buy aftermarket(genuine too expensive) or try using cleaning guys which costs same.
 
#15 ·
Have a search on here, someone bought a dpf cleaner, around 15£ ,, he used..
In fact thinking about it, have a look at the thread, who has had a dpf removed, its mentioned towards the end, think he might have put a link up also...
 
#16 ·
I have found company who uses special equipment to clean dpf, costs close to 300£ but they have 100% succes rate and only good reviews. Removing dpf would be easiest but if somebody checks on mot it will fail and i might be fined from 1k to 2.5k£. So i will look now for alternatives and carry on from there.
 
#19 ·
Dear friends. Please help. Renault scenic 1,5 dci,K9K 636.
Megane 1.5dci 110bhp 2012yr. k9k636. Had rough idle, cold start in idling is bad.
Then everything is fine. Poor performance at idle speed only in cold weather. Since -4.
This is a link to a video of the machine in cold weather.
Diagnostic result there is no problem.

thanks in advance for any information
 
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