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post #78 of (permalink) Old 20th June 2011
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Re: Renault Laguna 2 - 1.8 16v Throttle Problem*FIXED*

Success at last!
After heartfelt prayer...solution!
Took out ECU ....again, checked all connections etc.
Car running better but still same problem.
Was just about to check out six cables from throttle body to ECU for continuity when a friend suggested start engine and disconnect throtle body cable.
Did that and engine became lumpy and eventually shut down.
Diagnosis...cable is OK.
Took out throttle body ...again!
Took out four star screws and gently prised the lid off trying not to break anything...these are 250 all up fitted from Renault.
A flat piece of the inner black lid breaks away which needs to be put back into place on re assembly.
Inside the cap had a greasy film with lots of carbon deposit, sprayed out and thoroughly cleaned.
Next there are four contacts that look like metalic eyelashes that make contact with with the inside of the cover, carefully cover over the rest of the throttle body and spray clean without getting any contact cleaner on the electrics, then slightly bend them upwards so that when you replace the cover it makes good contact. The black piece needs to be put back exactly in position, clean off rubber seal, replace lid carefully and hold firmly in position whilst screwing in four star screws.
Replace throttle body .
So, after replacing the pump in fuel tank, complete fuel rail including the fuel regulator...all bought from Renault Specialist for 300, a new set of spark plugs, cleaning of ALL sensors, spray cleaning all engine wireing connections, dismantleing the throttle body , and feverent prayer my Laguna now runs like a rocket, it is the best that I have had this car going...and the bonus...I know how to service my car...properly.
Currently in LloydPatten's garage:
2002 Renault Laguna 2.0 IDE Sports Tourer

Last edited by Devils Laguna; 20th June 2011 at 09:30 AM.
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