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> Motorul trepideaza la relantiu (M10B20), De unde o fi?
bartro
post Aug 6 2007, 05:44 PM
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Salut,

De ceva timp am o problema pe care nu pot sa explic: la relantiu motorul trepideaza. Merge cam pe 3,5 cilindrii.
Am facut diverse incercari de bujii si fise dar chiar daca problema dispare, dupa scurt timp revine.
Chiar azi am inlocuit bujii de la Bosch (made in Germany) la NGK (made in Japan). A mers 5 minute foarte frumos (cat se poate la un motor de 39 de ani) relantiu, dupa care, dupa 300 de metri mers pe strada, a revenit la comportamentul vechi.

Cilindriile la care apare problema sunt 2 si 3. Cand merge bine, scot bujie curat, chiar daca am mers ceva cu ele. Cand apare problema, electrozi sunt negru, dar nu ud. Ciudat este ca la cilindru 3 apare cel mai des, iar la 2 cand in cand.

De unde o fi problema? Avans? totusi fise? timing de supape?


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INTERCEPTOR
post Aug 6 2007, 06:45 PM
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poate segmenti.daca sunt varza arde ulei si il pune pe bujie si ea nu mai poate sa dea scanteie.eu cred ca ai prob cu motorul nu cu aprinderea


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bartro
post Aug 6 2007, 07:00 PM
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QUOTE (INTERCEPTOR @ Aug 6 2007, 07:45 PM) *
poate segmenti.daca sunt varza arde ulei si il pune pe bujie si ea nu mai poate sa dea scanteie.eu cred ca ai prob cu motorul nu cu aprinderea


Poate. Numai ca nu sunt sigur ca sunt segmenti. daca desfac dopul de adaugat ulei nu sufla nimic pe acolo. Numai daca segmentul de ulei e dus atunci. Dar asta nu explica de ce a mers o bujie o saptamana bine si era curat, si apoi a cedat. Si vad o gramada de masini care scot un nor de ulei si merg bine pe relantiu. Nu mai inteleg nimic.


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INTERCEPTOR
post Aug 6 2007, 07:29 PM
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ciudat .la mine mot varza scotea nori de fum pierdea compresia si tot mergea super la relati .


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bartro
post Aug 6 2007, 08:14 PM
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QUOTE (INTERCEPTOR @ Aug 6 2007, 08:29 PM) *
ciudat .la mine mot varza scotea nori de fum pierdea compresia si tot mergea super la relati .


Asa am vazut o Lada 1200 care mergea fara filtru de aer prin nisip si cu nor de fum in spatele lui, dar relantiu fara tremurat. Vreau si eu :-(


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INTERCEPTOR
post Aug 6 2007, 09:46 PM
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sa nu fie ceva din supape.din garnitura de chiulasa
din compresie cine stie nu stiu
ca sa ai si tu ar trebui sa desfaci si tu


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georgem
post Aug 6 2007, 10:29 PM
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Eu la Audi 80 am patit asa ceva si era de la un injector, tragea aer fals pe langa el. La relanti mergea in 3 cilindri (din 4), daca scoteam fisa de la bujia cilindrului 1 nu se modifica mersul motorului la relanti, dar daca scoteam oricare alta aproape ca se oprea. Si motorul avea un tremurat la relanti. Dupa ce am schimbat tecile inectoarelor si o-ring-urile si-a revenit.
In mers era ok, probabil tragea prea putin aer ca sa afecteze, dar la relanti era suficient cat sa nu se mai aprinda amestecul. Tatal meu imi spunea ca simte miros de benzina in gazele de esapament (eu nu simteam), si la ITP a trecut la noxe peste scala aparatul smile.gif Dar dupa ce am rezolvat am trecut fara emotii testul de noxe la ITP, cu toate ca motorul trebuie segmentat (mananca 1 litru de ulei la 1000 km).


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INTERCEPTOR
post Aug 6 2007, 10:33 PM
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tu ai injectie el are carburator.nu e loc de comparatie.la el e ceva cu motorul chiulasa aprinderea.cine stie.tu macar ai identificat ce era el nu si da seama .cred ca trebui sa deschidem pe cord motorul sa vedem ce nu i place


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George77
post Aug 7 2007, 12:28 AM
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incearca sa vezi daca nu iti trage aer pe la furtunul care duce la servofrana,daca ai asa ceva,daca nu este ciudat ,se mai poate intampla atunci sa ti se inunde carburatorul si sa mearga neregulat ,sa fie de la cuiul poanto.Stai linistit ca nu este nimic intern,pistoane,segmenti ,supape,.Cu toate ca atunci cand trage aer fals nu se inegresc bujiile si atunci cand ti se inunda acrburatorul se inegresc toate bujiile,poate ,mai mult ca sigur traseul catre 2si 3 este mai scurt si poate de aia.


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bartro
post Aug 7 2007, 08:48 AM
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Ce e interesant din povestea lui georgem esta ca la el ca si la mine la o turatie un pica mai ridicata merge bine. Nu am turumetru, dar asa dupa estimari daca trec 1200 - 1500 rpm merge bine motor. Eu totusi ma gandesc la supape, poate nu inchid bine. O sa pun iar compresiumetru sa vad ce mai arate. Cand am incercat acuma ceva timp la toate cilindrii avea cam aceasi compresie. Diferenta era sub 0,5 bar.


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nmg
post Aug 7 2007, 09:10 AM
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Fisele de bujii cand le-ai schimbat ultima oara ? Sau capacul de la distribuitor ?


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bartro
post Aug 7 2007, 09:50 AM
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QUOTE (nmg @ Aug 7 2007, 10:10 AM) *
Fisele de bujii cand le-ai schimbat ultima oara ? Sau capacul de la distribuitor ?


Capac e noua, rotor e noua, tocmai pentru ca nu mergea cum trebuie. Fise am incercat 3 seturi, una noua, 2 folositi. Nu stiu daca cea noua era potrivit pentru masina. Set original de Bosch are rezistenta de 2kOhm parca pe fir, celalti nu au rezistenta aia. Nu stiu in cat poate sa fie de acolo. O sa vad daca gasesc un set noua ca lumea. Aveti recomandari? Bosch? Sau merge si alceva cum ar fi BERU?


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post Aug 7 2007, 09:55 AM
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bmw vine original la astea vechi cu beru .cel putin la dastea vechi cele mai multe le am gasit beru


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bartro
post Aug 7 2007, 03:08 PM
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Am pus un set nou de fise, Beru, proaspat luat, si bujii Beru. Toate dupa ce e recomandat de Beru pentru model respectiv de masina. Merge nitel mai bine, dar mai 'pierde' cand in cand o ardere. Relantiu acuma sta la 1000-1200 de rpm. Diseara o sa incerc sa mai scad sa vad cum merge.


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bartro
post Aug 7 2007, 08:38 PM
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Diseara am verificat joc la tacheti, e ok. Am setat iar avans static. Mege relativ ok, mai trepideaza un pic dar toate 4 cilindrii merg si pe relantiu. Treb sa vad cum sa tine. Si mai o sa verific compresie, cand gasesc echipament in debara.
Dar oricum cred ca o revizie de chiulasa + segmentare nu ar fi idea rea. Si tampoane motor noi.


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bartro
post Aug 10 2007, 11:50 AM
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Am incercat si alt distribuitor cu platine noi, nu face diferenta. CU asta am exclus aprindere din lant, ramana sa verific restul motorului unsure.gif


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