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W126Club.nl • 500SEC Start Slecht koud en warme motor : Techniek - 2
Pagina 2 van 2

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 21 mei 2020, 22:52
door Machiel
Welke verbinding is niet goed? Hoe herken je die?

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 21 mei 2020, 23:50
door Leeflang
bpr.jpg
Te herkennen aan het donkere vierkantje, dat zijn scheuren in het soldeertin.
Iets verder naar boven, net boven de groene stip is er nog een.
Links onder lijken er ook een paar niet meer 100%.

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 22 mei 2020, 00:13
door Machiel
Leerzaam weer, bedankt!

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 22 mei 2020, 00:26
door Leeflang
Het kunnen trouwens ook donkere cirkels zijn.
Hier zijn het vierkantjes omdat de pinnetjes die daar vastgesoldeerd zitten vierkant zijn gemaakt door de fabrikant.
Als de pinnetjes rond zijn, zijn de breuken ook rond.

Het treedt het meest op bij vrij zware onderdelen, zoals relais, de stekkers, of (transistoren met) koellichamen.
Door trillingen en schudden ontstaan er eerst kleine gaatjes of scheurtjes en die scheuren in de loop der jaren steeds verder, totdat het pinnetje nergens meer contact maakt met het soldeereiland waar het in zit, dan werkt het ding niet meer, of nog maar af en toe, als het pootje toevallig net tegen een rand van het soldeereiland leunt, een trilling (tik) kan soms zo'n vage verbinding spontaan creƫren dan wel verbreken.

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 07 jul 2020, 13:22
door Jeroen B.
Beste Leden,

Ik ben deze week verder gegaan met mijn 500SEC. Het starten blijft slecht. Ik heb gisteren de verstuivers eruit gehaald (leidingen wel aan verstuivers en spinnenkop laten zitten) en bakjes om de verstuivers gemaakt, om de verstuivers te testen heb ik de brandstofpomp direct aangestuurd met een plus draad naar de brandstofpomp. Nu viel het op dat er af en toe 1 verstuiver na lekte. Deze bleef nog ongeveer 2 minuten heel zacht inspuiten(in het bakje) terwijl ik de brandstofpomp allang niet meer aanstuurde. Nu dacht ik dus dat de verstuivers slecht waren, deze net vervangen. Maar probleem is hetzelfde(blijft nu alleen inspuiten op een andere cilinder)met de nieuwe verstuivers. Ook valt mij op als ik de luchtweger niet induw dat er een paar verstuivers bijna niet inspuiten(meer een beetje druppelen) hebben jullie nog tips waar ik naar moet kijken?

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 01 aug 2020, 14:20
door Iwema LPG
De K-Jetronic motoren hebben als ze ouder worden wel vaker startproblemen.

Meestal start ik met het meten van de drukken en de toegestane lekken.
Dan heb je de fout meestal wel te pakken.
De K-jetronic kent temperatuur- en tijds afhankelijke start procedures.
Daarom starten ze soms wel en soms niet of moeizaam.

Als er injector problemen zijn starten ze meestal probleemloos op 6 of 7 cilinders.

Gezien de prijzen van de diverse onderdelen zou ik als het probleem nu niet is opgelost naar een auto-diagnose-center gaan.
Zij kunnen de fout snel vaststellen en dat voorkomt onnodige uitgaven.

Kom je er niet uit vraag mij gerust.


https://www.youtube.com/watch?v=iTmV6XB85tI

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 16 jun 2021, 09:06
door Roninbenz
Jeroen,

Wat was uiteindelijk de kwaal? Ik zit namelijk met het zelfde probleem, bij warme motor af en toe langer doorstarten. Als hij hem dan pakt dipt de motor wat in om vervolgens zichzelf goed op te pakken. Dit gaat dan gepaard met een zwart pluimpje en een fixe benzine lucht. Bij koude motor en of als ik hem uit de stalling haal slaat de motor al aan bij de eerste draai van de sleutel. Perfect.

Ik zie graag een antwoord tegemoet.

Ronin

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 16 jun 2021, 10:04
door RD500SEC
Dat zou de accumulator bij de brandstofpomp kunnen zijn.
Kijk eens of deze lekt, op de accumulator zit een lekslangetje, deze is verbonden met de tank.
Als je deze los haalt van de accumulator en de slang gelijk dicht stopt met bv een passende drevel of centerpons, kun je de motor laten draaien. Er mag dan, behalve in het begin als de accumulator op druk wordt gepompt, geen noemenswaardige hoeveelheid brandstof uit komen.

Re: 500SEC Start Slecht koud en warme motor

BerichtGeplaatst: 16 jun 2021, 15:40
door Roninbenz