Logan 1 repeated misfire/vibration/stalling, Technical issue
Logan 1 repeated misfire/vibration/stalling, Technical issue
Mark.gebel92 |
30 Aug 2018, 09:39
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#1
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Membru incepator Group: Members Posts: 5 Joined: 30 August 18 |
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Dacia
Logan 1, 1.4mpi
2006
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einstein1984 |
30 Aug 2018, 10:32
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#2
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fan Dacia Group: Members Posts: 20.705 Joined: 12 November 05 From: Bucuresti |
swicth between nr 4 fuel injector and nr 1 and see if fault follows the injector. Be carefull of orings when pulling injector out of the fuel rail. If fault switches to nr 1 cilinder, replace faulty injector. If not, check for mechanical issues (tight valve clearence, low compression) on nr 4
do you have LPG on it also? If so, some ecu parameters might us ea reset before anithing else. good luck |
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daca nu ai o toyota
4X4,ai gresit
masina
- negru pe alb
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Mark.gebel92 |
30 Aug 2018, 12:42
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#3
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Membru incepator Group: Members Posts: 5 Joined: 30 August 18 |
Hello,
Thank you very much for your reply. I appreciate it. I will try to see if the injector might be the problem. I considered doing this procedure before, but having no way of relieving pressure (unfortunately it is not clear to me which relay controls the fuel pump) from the fuel lines i somewhat gave this up. About LPG - the car has no LPG I will try to see if i can find a way to carry out this procedure and carry out your suggestion. Thank you This post has been edited by Mark.gebel92: 30 Aug 2018, 12:45 |
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Dacia
Logan 1, 1.4mpi
2006
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sorin1983 |
30 Aug 2018, 22:34
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#4
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Membru autentic Group: Members Posts: 5.615 Joined: 3 July 06 From: Bucuresti-Rahova |
maybe it's the catalyst converter...
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Renault
Megane1-
-Sisteme electronice de securitate "Pe zi ce trece, prostii fac progrese, devin si mai prosti!" C. Vadim Tudor
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Mark.gebel92 |
31 Aug 2018, 11:02
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#5
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Membru incepator Group: Members Posts: 5 Joined: 30 August 18 |
Good Morning,
Thank you for your answer. I understand that the repeated misfiring might damage the catalytic converter, but how can a faulty cat affect the overall performance in this way. is it plausible? Also the rear end O2 sensor has been monitored quit closely by me. The voltage reading according to my information is good and it doesnt seem to me that (high amounts of) raw fuel is getting in there or anything that might damage the catalytic converters performance in any way. I might have to check this again as it has been a couple of months since i did this inspection. Personally, I think this is an injection problem overall. I think that the misfire is a lean misfire caused by a clogged or partially clogged fuel injector(s). When the misfire occurs and i read the freeze frame data from the OBS tool the fuel trims are showing lean mixture (negative) in all cases. When the engine is cold before the O2 sensor kick in i believe the ECU is programmed to apply a biased rich fuel mixture until it is in open loop. Since the injector might be clogged then it might be that not enough fuel is getting into the injectors, and therefore cyclinder, to keep the power in the car when load is relieved (stalling issue.) The shaking at idle/stopped could also be cause by a clogged injector relieved from load being shy and not spraying enough fuel into the cyclinder causing this shaking condition and causing the O2 sensor to go crazy while trying to adjust for this condition. It would be nice if someone could confirm my logic I have booked myself in for a inejctor check at a local mechanic and a thorough fuel system cleaning. I think that it is the best place to start as proposed by Einstein This post has been edited by Mark.gebel92: 31 Aug 2018, 11:03 |
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Dacia
Logan 1, 1.4mpi
2006
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MyKe89 |
31 Aug 2018, 11:08
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#6
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Membru RFG Group: Members Posts: 3.026 Joined: 16 December 07 From: Bucuresti |
You have figured it out, kudos!, the clogged injector is also my guess.
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'23 Honda
CR-V
e:HEV ‘02 BMW Z3
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Mark.gebel92 |
31 Aug 2018, 12:16
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#7
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Membru incepator Group: Members Posts: 5 Joined: 30 August 18 |
Hello,
Thank you for your answer. I appreciate it. I will post something after the diagnose from the shop to update on whether the issue has been solved or not. Regards, |
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Dacia
Logan 1, 1.4mpi
2006
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Mark.gebel92 |
23 Sep 2019, 21:13
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#8
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Membru incepator Group: Members Posts: 5 Joined: 30 August 18 |
Good Evening,
Quick feedback on the issue below. Turned out that this was not an issue with the injectors in the first place. We brought the car to a mechanic who had experience with first generation renault engines and he immediately saw the issue that so many meganes and clios had before: VALVE MIS-ALIGNMENT!! The previous owners of the car never had had a proper service done to the car and the exhaust valves were completely out of standard. This was more pronounced when the engine was cold and repeated misfire + engine stalling occurred until the engine heated up to operating temperature and the metal components of the cylinders expanded just enough to make the problem disappear. The man popped open valve cover, calibrated the valves and that was it. Problem solved. If you are experiencing similar problems as the one we had the above is definitely something to keep in mind |
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Dacia
Logan 1, 1.4mpi
2006
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einstein1984 |
24 Sep 2019, 08:42
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#9
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fan Dacia Group: Members Posts: 20.705 Joined: 12 November 05 From: Bucuresti |
if the injector permutation turned out same result, that would have confirmed a mechanical problem so probably valves.
glad you solved it. |
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daca nu ai o toyota
4X4,ai gresit
masina
- negru pe alb
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Barrie |
29 Sep 2019, 06:47
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#10
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Membru incepator Group: Members Posts: 42 Joined: 15 April 08 |
Try using a petrol with the least ethanol. Ethanol attracts humidity and so causes low temperature misfiring. It certainly helps with older vehicles.
Here in France, the 98 octane is best. Bon Chance, Barrie |
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Dacia Logan
Logan MCV Diesel
2008
- Not known yet
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