PLEASE READ : FIXED Laguna dci - warning light, lack of power, jumpy throttle - Page 4 - Renault Forums :: Independent Renault forum

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post #16 of 23 (permalink) Old 8th February 2010
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Re: PLEASE READ : FIXED Laguna dci - warning light, lack of power, jumpy throttle

The unit held on by the bolts is the damper stop valve and should be secure otherwise either the damper valve may float about or worse stilll there will a leak in the inlet air being fed from the turbo . Either of these aspects will cause poor running.
Any similar bolts of equal thread, diameter and length should do but fitting spring washers would also reduce the risk of the loosening again.
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post #17 of 23 (permalink) Old 7th October 2010
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Re: PLEASE READ : FIXED Laguna dci - warning light, lack of power, jumpy throttle

This sounds promising for my Laguna too that is showing these same signs....can ayone point me in the right direction of where this sensor is on my 1.9 DCi 130 HP 785 Engine Code??

Thanks in advance chaps!!
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post #18 of 23 (permalink) Old 22nd November 2010
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Re: PLEASE READ : FIXED Laguna dci - warning light, lack of power, jumpy throttle

Is there a way to detect broken sensor wire, though is not visually seen as in your case? I mean,it's easy to fix the problem when wire is so obviously clearly seen as in your car,but what if the problem(broken wire) is hidden somewhere?
Your thoughts,experiences? Thanks in advance
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post #19 of 23 (permalink) Old 28th November 2011
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Re: PLEASE READ : FIXED Laguna dci - warning light, lack of power, jumpy throttle

Originally Posted by Maq View Post
To All

I just want to say that for months on & off I have like many others had the Coil Warning light problem, the lack of power when pressing the throttle.
Also the running with the turbo seemingly "off" as well as the "jumpy" & intermittent pick up of power.

I have read this forum for months trying to find the answers and to be honest I have tried everything:

Cleaning the EGR valve - I posted a "how to" with pics.
I even bought new EGR valve, new turbo solenoid cos it was buzzing like a good un (it shouldn't) and the turbo pressure switch. MAF was ok too.

In the middle of all that I blew the turbo & replaced that and the intercooler. I alos changed the air, fuel and oil filters, changed the preignition coils and glow plugs. and what for ...... nothing, niet, nada, rien. :loser:

Then after running along at max 70km/h in "limp mode" for 3 days now and planning to torch the b***h, MadNoel comes along with a seemingly unimportant observation ==>

Quote "One member of the forum had a similar problem and it was eventually discovered that the wiring connections and loom to the turbo pressure sensor was faulty. It may be worth exploring that aspect."

here ==>

So I thought ok - it doesn't "seem" electrical but hey what the hell.

And the problem is now solved (fingers crossed).

The culprit is a broken wire on the connector to the turbo pressure switch- i mean how simple to over look that but it was hidden in a cable cover and I guess that's why I didn't spot it before.

Next came the big problem- how to fix it as I made a quick botch-fix (run like a dream all the way there :20km and back) and visited the local Renault dealership and they don't sell the plugs & connectors - they only replace the whole freakin wiring loom - so sod that !!.

I got into the tool box and was thinking of soldering it back on when the little lifesavers jumped out and presented themselves - in the form of electric wiring connectors.

So another botch fix started:

Cut the 3 wires from the connector but label one as 2 are grey and one yellow.
strip & attach to the wire connectors.
Plug into pressure sensor
tape over to stop damp
broooooooom brooooooom broooooom

viola - no warning lights , power restored, no throttle issues AND it didn't cost me a cent - well that is if you don't include all the wasted money on parts I probably didn't actually need. But hey it's a fix for me.

I just want to add here that this is a fix / repair for me and I'm not saying it'll resolve everyone's problems but I seem to have been thru the whole range of problems that some of you have and as a result tried (and failed) to find the actual cause.

I hope this helps someone as MadNoel certainly helped me and dserves a gazillion rep points for that little gem of advice.

Renault on the other hand - don't have a clue and when I called out the Belgian AA equivalent last week, he "diagnosed" a dirty fuel filter. A**e !

I have attached the pictures here - hopefully in order.
Excuse the quality but they're from my iphone as we left the camera in the Uk last week when we were over.
How good is this forum??????

I was getting so worried about my week old 03 laguna estate and the dashboard light,limp mode and lack of power....I discovered this forum and spent a week looking and searching to no avail in the search for a cure.

Today i stumbled along this post and in particular the part about checking the wiring to the turbo pressure switch. Lo and behold!!!!! a broken wire,repaired in 5 minutes at no cost to my self (apart from 10 on new solenoid).

Car is now pulling like a good un and everything just seems so much better - the above post has saved me potentially many,many . Thanks so much !!!!!
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post #20 of 23 (permalink) Old 17th December 2011
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Re: PLEASE READ : FIXED Laguna dci - warning light, lack of power, jumpy throttle

Thanks Maq

I had a similar fault with poor performance and erratic throttle control. I tried changing the MAP, MAF , EGR and wastegate solenoid without improvement. Eventually the car dropped into 'limp home mode' and the wastegate solenoid started buzzing. When I saw your thread I checked the wires on the boost sensor by stripping back the insulation and testing continuity between the plug and the wire but all seemed OK. Just before I scrapped the car I tried one last fix by pushing a small piece of silver foil into each of the three holes in the plug and amazingly the fuel injection fault light went out and the car is now driving normally.

Many thanks for pointing me in the right direction.
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Old 12th November 2012
This message has been deleted by dave_mezza2006. Reason: duplicate

dci , fixed , jumpy , lack , laguna , light , power , read , throttle , warning

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