Renault Laguna 2 - 1.8 16v Throttle Problem*FIXED* - Page 3 - Renault Forums :: Independent Renault forum

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post #11 of 129 (permalink) Old 2nd August 2007
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Hi Kuldip

The problem was traced to a blocked / dirty valve in the throttle body , they seen to clog up if the petrol gets low
on a regular basis .

throttle body stripped and serviced , since then no probs ( touch wood )

I am in edinburgh area ( scotland )

Hope you get your problem fixed ,

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post #12 of 129 (permalink) Old 2nd August 2007 Thread Starter
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Hi Chris,

Thanks for the info. You lucky guy, I wish mine was fixed. When I first took the car to the Renault garage they didn't clean the throttle body but replaced it but it didn't make any difference as the problem surfaced again within a month or so. I always keep my tank half full of fuel so that rules that out I think The problem is now getting worse and I have to take the car again to the Renault garage and see what happenes.

Anyway many thanks for the info. and good luck.

Take care.


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post #13 of 129 (permalink) Old 10th October 2007
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limp home mode

Hi Kuldip

Welcome to the world of conflicting and differing diagnosis coming from renault dealers.My problem is similar in nature( limp mode) and the solutions suggested from independent and renault dealer include throttle body replacement, injection ecu replacement and pedal replacement.

After reading many posts on this forum
of all of the above parts replaced and still no luck i have been coping for about 2 months with the problem occuring within 10 minutes of every journey untill about 3days ago.

What i have been doing is shaking the wire harness of the E.C.U on the side and under the battery and also removing the fuse cover and shaking /tapping the relays.

I have done this on 4 of my last 5 trips with the problem occuring only on the trip i did not do it (third trip).

Can't say it's a sure fix yet , maybe someone will say if there's a problem in that

A little reason to smile.
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post #14 of 129 (permalink) Old 25th October 2007
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Laguna 2 injecion fault probs, throttle body,Injec ecu

ok guys here goes this i my story , ive posted about this on forum a few times ,this problem has been driving me barmy for months , where the car throws up a fuel injection faut, runs rought at idle , no accelerator, and revs between 2000 to 5000 revs al same probs as u all report , wait a bit and it resets after varing time

i went to dealership to cut a long story short and at daft cost had throttle body striped n cleaned, wiring checked, new plugs then did it again , so had new throttle body wiring checked again told all was well, behold it did it again

so i went to an independant place had full wiring loom opened an checked found broken wire fixed that took off main ECU from under battery tray ( no good place to put it ) an guess what all plugs n pins on ECU corroded to the hilt
so they are currently in the process as i post trying to fix it

also all the fault codes it throws up are not really faults the ecu ges confused and reads signals wrong ive had them all
to list a few- flywheel sensor, pollution monitor ( but thats coz its not running efficiently) and a few more

Top n bottom is when the car drives its ok so, if all else fails its a new ECU quoted 334 for part then requires reprog to car so god knows and am poss thinking if they cannot fix the corroded plugs a new wiring loom


If anyone can add to this please feel free
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post #15 of 129 (permalink) Old 25th October 2007
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This sounds very familiar.....

We have had a lot of Lag 2 1.8 petrol owners complaining of throttle problems,and originally if the throttle body was replaced the problem was remedied.Then the problem would come back,and they generally had to have a new ECU .....but no explaination was ever given as to why.....I think you have just told us!.

Depending on the state of the connections,they might be savable,but if they are too bad,then the plug will need to be replaced.....and guess what,the plug isn't available seperately and you will need a new loom!.This can be very expensive.....

I'd rather push my Alfa than drive a BMW....
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16v , laguna , problemfixed , renault , throttle

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