L'EGR/débi-mètre , un sujet inépuisable

06-12-2005 à 14:28:21
Bonjour à tous

Je suis un petit nouveau, c'est mon premier post.
Je suis l'heureux possesseur d'une OPEL Astra coupé 2L turbo (essence ) de 2001. J'ai deux problèmes, le premier, le voyant échappement allumé, l'impression d'un trou à l'accélération à 4000 tour, ( ça grimpre raide, puis mou, et ça reprend pas trop mal ), le deuxième, les 2 garages Opel avec qui j'ai eu affaire sont des boulets. Le premier a changé la sonde lambda , après reset calculateur, le témoin du tableau de bord est resté éteint deux jours ( j'étais encore sous garantie, mais les boules quand même ), j'ai vécue avec 1 an, un deuxième garage a dit "Eureka, c'est la connectique de la sonde au niveau moteur, ont a changé le connecteur, c'est réparé ", le deuxième jours le voyant s'est rallumé. Quand j'ai récupéré la voiture au garage, elle a eu des ratés au démarage, ralenti instable, pas de puissance, pendant 30 secondes, un truc qui ne lui arrive jamais ( non seulement , il répare pas, mais en plus il la bousille ... ).
L'ensemble vous fait penser à la vanne EGR encrassée , au débimétre ou une sonde que je ne connais pas ?, c'est bizarre qu'après reset, le témoin s'éteigne, on dirait qu'il attent quelque chose, peut une forte accélération pour se rallumer.

Quand on a un problème mécanique, vaut mieux avoir une idée précise du problème avant d'aller chez le garagistre, ça limite les réparations pour rien !!!!

George
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06-12-2005 à 12:01:52
C'est passé en garantie les opérations en question ? Si tu as mis quelque chose de ta poche, taquine les car ils ont obligation de résultat.

Ils t'ont explicitement dit ce que le passage au diagnostique renvoyait comme erreur ? Car moi j'aurais pensé à un capteur d'AAC, ou vilebrequin. Mais je connais pas du tout le Z20LET, si c'est comme ses ancêtres, ces capteurs étaient assez capricieux. Mais normalement ces capteurs renvoient des codes d'erreur explicites au diagnostique !

Je serais vraiment étonné que ça soit l'EGR ou le débitmètre sur une essence, surtout aussi récente...

Mais vu les emmerdes, y'a des chances que ça soit un problème de connectique, parasitage électronique ou calculateur foireux. Je te conseille vivement de faire passer en garantie si encore possible, car ce genre d'emmerdes peut revenir TRES cher.

--Message édité par little_buddha le 06-12-05 à 12:04:29--
06-12-2005 à 12:21:36
Je suis hélas plus sous garantie , c'est la raison pour laquelle je suis très motivé pour savoir ce qui se passe afin de réduire au max la facture, au max, ça veut dire qu'ils réparent uniquement ce qui ne fonctionne pas au lieu d'aller aux champignons.
capteur AAC ? j'ai pas compris de quoi il s'agissait sur le net ... quant au villebrequin, je vois pas le lien direct avec mon témoin échappement du tableau de bord ? Je bosse dans l'électronique, je connais un peu les concepts de motorisation moderne mais sans plus. J'avais moins d'emmerde avec ma Citroen LN de 76 !
06-12-2005 à 12:40:32
Le capteur AAC, c'est le capteur d'arbres à cames, situé entre les 2 poulies d'arbres à cames pour repérer le point mort haut du premier cylindre et adapter la séquence d'allumage.

Pour le coup du voyant des gaz d'échappement, ça s'est souvent vu sur astra et astra-coupé et ça peut venir de tout et n'importe quoi. Dans les divers cas, ça a souvent été résolu par le changement d'un des composants suivants :

- faisceau + calcu (très cher, aux alentours de 1000 €)
- débitmètre (env 300€ chez Opel, peut-être u npeu moins en allant chez Bosch directement)
- sonde lambda
- catalysation (sûrement vers les 500 - 600 €)
- capteur AAC (moins de 100 €)
- capteur vilebrequin (moins de 100 €)

Donc voilà, pas évident de prédire ton problème.

Mon père avait eu des problèmes similaires sur son ancienne vectra A, heureusement sous garantie. Le garage avait quasiment tout changé, sondes, calculateur etc etc sans succès. La voiture était finalement repartie chez GM France qui a recâblé la voiture et ça a marché. Au final, si mon père avait dû régler les factures, ça aurait sûrement chiffré à plus de 2000 €.

C'est pour ça que tu devrais faire jouer leur obligation de résultat pour te faire rembourser les opérations déjà faites non concluantes, et si les premières réparations ont été faites dans la concession d'achat, les taquiner en insistant sur le fait que le problème existait pendant la garantie, qu'il n'ont pas su le résoudre, et qu'aujourd'hui si tu dois débourser, essaie de les faire participer partiellement à la prise en charge.
06-12-2005 à 14:28:21
Merci, je donnerai des nouvelles quand ça sera conclue !
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