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Old 02-27-2018, 10:19 PM   #1
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Default Audi R8 v8 2009 problème à froid

Salut les amis
j’ai une r8 qui a froid démarre bien mais pétarde ,fait des trous à l’accélération au point mort et au ralenti le régime est instable. Du coup il y a des ratés allumages aléatoires sur cylindre. Et elle sent fort l’essence. J’ai regardé les paramètres. Tout semble correct et zéro défaut. Elle fait le problème 30 secondes à 2 minutes. Après il y’a quelques ratés mais visible qu’au diag en paramètre sinon à chaud les ratés ne sont pas ressentis.


Ps: Bougies et bobines neuves.

Merci d’avance
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Old 02-27-2018, 10:20 PM   #2
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Slt l ami j'ai déjà eux des problème de rate aléatoire sur certaine voiture j'avais les injecteurs en default etc et c'était simplement la batterie essaye de fois que..
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A force de galérer le diag devient une passion......
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Old 02-27-2018, 10:52 PM   #3
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Quote:
Originally Posted by julien34560 View Post
Salut les amis
j’ai une r8 qui a froid démarre bien mais pétarde ,fait des trous à l’accélération au point mort et au ralenti le régime est instable. Du coup il y a des ratés allumages aléatoires sur cylindre. Et elle sent fort l’essence. J’ai regardé les paramètres. Tout semble correct et zéro défaut. Elle fait le problème 30 secondes à 2 minutes. Après il y’a quelques ratés mais visible qu’au diag en paramètre sinon à chaud les ratés ne sont pas ressentis.


Ps: Bougies et bobines neuves.

Merci d’avance
Salut
quel outil de diag ????
Elle sent fort l'essence : peut être régulateur de pression essence !!!!!
logiquement elle devrais remonter des défauts au diag !!!!!
cdlt
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Old 02-27-2018, 11:00 PM   #4
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+1 pour l'outil de diag,
parce qu'une R8 c'est pas une lada, le moindre default doit apparaitre au diag, meme les defaut de combustion.
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Old 02-28-2018, 06:55 PM   #5
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zéro défaut vcds et guttman hella derniere mise a jour, batterie neuve , en tt cas la il fait froid normalement le ralenti est à 1400 1600 tour , la elle est a 800 , et dès que je donne des petits coup d'accélérateur il y a un trou puis elle monte un peu et petarde bien comme il faut .

---------- Post added at 19h55 ---------- Previous post was at 19h54 ----------

par contre elle démarre au quart de tour
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Old 02-28-2018, 06:56 PM   #6
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salut sonde de température indique la bonne ??
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Old 02-28-2018, 07:04 PM   #7
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température eau elle est bonne , température extérieur également
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Old 02-28-2018, 07:07 PM   #8
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tu mets qu'elle essence ?? mélange SP 98 et bio ethanol !! ne cherche pas plus !!
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Old 02-28-2018, 07:12 PM   #9
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elle n'est pas a moi , je lui ai demandé il met du SP seulement. c'est cohérent sinon il aurait défaut de lambda ça fait bien 1 mois que ça le fait et ça empire
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Old 02-28-2018, 07:19 PM   #10
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il faut des bougies speciales là dessus !
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Old 02-28-2018, 07:21 PM   #11
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ok demain je démonte ,et je vous dirais ce qu'il ya , puis je vous ferai un Scan des paramètres

merci
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Old 02-28-2018, 07:30 PM   #12
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les bougies se noies je pense , passe par des bougies d'origines !
voir si il existes une corrections des bougies !! grand froid ! déjà vu ! sur d'autres marques
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Old 03-01-2018, 10:37 PM   #13
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Salut,

Cherche pas, si zero defaut et tu as changé les bougies et les bobines,
refais une auto-adaptation.
ca va repartir comme neuf.

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