Renault Laguna 2 - 1.8 16v Throttle Problem*FIXED* - Page 8 - Renault Forums :: Independent Renault forum

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post #36 of 129 (permalink) Old 2nd September 2008
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I'm still battling along with this, my car's ecu is presently away to be either fixed or exchanged (sagem s2000, one of the most difficult to work on apparently )
When it returns I'll post the results and my experiences so far!
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2002 Laguna 1.6 Expression
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post #37 of 129 (permalink) Old 3rd September 2008
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just checked my cars service history more carefully, it appears that as well as a new throttle body it has had the engine management system replaced (assume this is ECU ) so I'm not sure what to do now, Bub, how did you get at your ECU I can't figure out how to get the battery box out?
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2001 Laguna II Expression 1.8
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post #38 of 129 (permalink) Old 7th September 2008
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Open throttle on 1.8 16v Laguna Sport Tourer

Thought i would share my experience of this subject with you. I too, have had the sticking throttle problem, fuel injection system faulty etc. I was told it was the ECU as the voltage readings to the throttle body were incorrect and hence why it was constantly revving at over 2000rpm. After a new one was fitted and programmed by Renault dealer it did not fix it. This meant that it could only be the wiring loom on the basis that they tried a new throttle body but it still gave the problem and as mentioned above the ECU was replaced. When i picked the car up the technician showed me the contacts in the plug on the wiring loom that mates in the ECU ....and you could tell by inserting a small test probe that some of the contacts had lost there ability to spring together, when mated into the ECU connector, and therefore was creating an open circuit...that goes to the throttle body ! The new loom was fitted and the car now runs fine....the cost of all this was >£1,000....hope this may help someone.
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post #39 of 129 (permalink) Old 2nd October 2008
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Originally Posted by kuldip S Obhi View Post
Hi Chris,

Thanks for the info. Please let me know if your car problem is fixed after the replacement of the potentiometres, then perhaps let me know where this mechanic is so that I can get it fixed of him if he is in my area (Cheshire).

Thanks again.

Hi Kuldip

Have you got your car sorted yet? I've got a simmilar problem with my 2002 1.6 laguna but feel even more helpless than most of you guys as my car is in St Lucia (Caribbean) wher we have no renault dealers and only 2 other renaults on the entire island! I've done the throttle body replacement thing which did not work but while I am awaiting a ¤¤¤¤ion I've notice by quickly disconnecting then reconecting the + battery pole it appears to clear the error allowing me to continue my journey without the usual wait to allow the engine to cool down....considering installing a "flick" switch from the battery to inside the car ;-)

Will try cleaning the ECU conectors and let you all know if that make a diffrence
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2001 Nissan Skyline GTt, 2005 Laguna2 1.9 dCi & 2003 Laguna II (when it works)
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post #40 of 129 (permalink) Old 3rd November 2008
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Hi, really hope someone can help with this issue as its been frustrating me now for about 3 months. Bought this car just over 12 months ago, within the first month the car would stall if i was idling in traffic, but only after i had been driving for half hour or more. I took the car to my local garage who didi a diag test and it came back the crank sensor. This was replaced and it worked fine. It then started again 6 months later and again i had the sensor replaced. Again it fixed the prob. About 3 months ago i started getting starting issues where it could sometimes take me up to 8 attempts to start the car but this is a very intermittent problem. My garage tried all sorts but it is still there, then last week the stalling issue started again except now i have to leave the car to cool down b4 it will start again.....aaarrggghhh.... Any ideas greatly appreciated, i am back in the garage 2mora with it so ill see what happens.

It is a laguna II 1.8 16v expression 2001 'Y'
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Last edited by davenkirsty; 3rd November 2008 at 09:23 PM.
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16v , laguna , problemfixed , renault , throttle

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