Renault Laguna 2 - 1.8 16v Throttle Problem*FIXED* - Page 10 - Renault Forums :: Independent Renault forum

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post #46 of 129 (permalink) Old 27th November 2008
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Originally Posted by davenkirsty View Post
Hi, yeah it was the crank sensor, but i have had 3 fitted now, the most recent one is a blue one whichis apparantly a new type and seems to have done the job.....*fingers crossed*
Thanks for this information and good luck. I've replaced my crankshaft sensor twice. The first one was good enough to keep the car running fine for two weeks. The second one has provided no positive effect at all. Now I'm looking at a very suspicious fuel injection relay. It feels very hot when other components in the relay/fuses box are just warm slightly. The ECU seems to be connected to the throttle body through this thing. Maybe it’s the reason of a limp mode in my case.
Thank you.
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post #47 of 129 (permalink) Old 6th January 2009
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Limp cure

Laguna 1.8 Petrol Limp Mode Cured (I Hope)

Now done over 2000' with no probs.
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Last edited by jasmcp; 6th January 2009 at 01:28 AM. Reason: Update
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post #48 of 129 (permalink) Old 23rd July 2009
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Smile Throttle problem fixed

Originally Posted by trevstamf View Post
well what can i say....................

After months of barmy antics , visits to the dealers , lots of cash spent at lieing dealers who just want to rip you off because the clip test tells them to replace parts that are not really at fault or broken


My car is now running like a dream as it should without a murmer just perfect,

And it was all down to corroded dirty pins on the main ECU and wiring loom sockets at the ECU its a simple as that

I paid for a new throttle body that was not required 3 visits to the dealers and was told they had checked the wiring completely twice.............. utter crap otherwise surely that would have been picked up

All the dealers do is replace parts the clip test or ECU tells them i had a list well long of various things but, it was all false, there was nothing ever wrong with the parts at all just that the bad connections had caused the resistive values to go ¤¤¤¤ a hoop.

Now im told by a reliable source that when they are first put together at factory they spray a anti corrosive gel onto the plugs and contacts to prevent corrosion or water ingress, after a few years this gel sets rock hard and then looses it properites and hey presto u get corrosion and duff contacts on the plugs n pins at the ECU under the battery tray

It has taken my independant garage who have lots of diagnostic equipment a week to go thru my car with a fine toothcombe wiring loom everything and come out with the answers its geat.......... Why could the DEALERS not do this is just not right

Bear this in mind if i had have gone back to the renault dealers they wanted to change the coils , the fuel injection ECU , then the main ECU , thats what they told me would need to be changed utter carbage, unbeleiveable

Im just so chuffed its fixed its been a long 6 months
Of course the other outcome would have been that if the plugs and pins had been to badly corroded then a new loom and poss ECU might have been required but i carnt help but think if it had been picked up on my very first visit to the renault SPECIALIST Dealers then all this might have been prevented after all it was with tem 4 days and they throughly chcked all the wiring did you Really

Hope this helps anybody else who has gone thru this hell We dont have open cheque books RENAULT to replace everything your clip test says sometimes that lies too
At last there is light at the end of the tunnel, for months i have been plagued by this problem.....I can now go to my mechanic and point him in the right direction cheers
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post #49 of 129 (permalink) Old 8th October 2009
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and furthermore...

Good to read this. I will devote some time to cleaning up all the contacts again.

While suffering this problem, I have noticed that killing the engine while in motion (by putting it into neatral, keeping the clutch down, then pressing the engine starrt/stop button unitl it stops the engine) and then running the car in gear with the clutch out for a few hundred yards (depending on speed and location!). The car generally then restarts and runs properly for a while. On stopping and re-starting the journey though it often happens again.

I cannot see why doing this though would help bad connections get remade though
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post #50 of 129 (permalink) Old 8th October 2009
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One of the basic rules of electronics I'm afraid. Killing the power supply and switching back on can cause a slight surge which may temporarliy overcome a poor connection or duff electronic component.
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16v , laguna , problemfixed , renault , throttle

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