myvi auto shaking and choking during idling, sifus please help
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 Nov 15 2011, 10:29 PM
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#21
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang  
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ya,i've already asked them but they give me an answer like..that is the absolute solution for my problem..its like..if its not the harness wire,then,they couldn't think of any other possibilities other than scrap the car...and that is not good at all.
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Nov 16 2011, 01:26 PM
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#22
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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QUOTE(felicia666 @ Nov 16 2011, 10:51 AM) should confirm wiring spoil and change it first before changing ecu. but it's easier to change ecu than the whole wiring. so they basically make guesswork on your problem and change the ecu w/o solving the problem at the same time made a killing on spare parts sales since ecu cost more. 1. i've already changed the fuel pump..the fuel pump is connected to the fuel filter. i dont know if myvi has another fel filter at the engine.i would think the spark plug wires (cord set) would be a concern rather than the wiring harness. btw, ask them to list out the p/n, description and cost of each wiring needing replacement so you know which. try this buddy:- change fuel filter (if not changed every 40k) check wiring check alternator voltage (change if low, also change battery at the same time) check spark plug cable (change if spoilt or car already 100-150k) check distributor it took me 2 years to solve my problem but i'm not sure if mine is same as yours. the problem appear once in a while and may something not occurred at all until major breakdown. you'll need to provide more detailed symptoms. ps. sa love naive drivers and will bs you all the way while spending little time troubleshooting (4 days become 1 hour for them) and replace parts by trial and error manner without confirmation the real cause.  2. what wiring are you talking about? 3. the alternator voltage have been checked by AAM member and it is OK. 4. the SC has already tested using a new spark plugs but still the problem persist. 5. the distributor i dont know. will have them check first. i dont know how to provide more detailed symptoms as the ones that i have described is the ones that i am encountering right now. |
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Nov 16 2011, 05:15 PM
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#23
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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QUOTE(felicia666 @ Nov 16 2011, 01:50 PM) 2. wiring that sa mentioned. funny how sa conclude it's the wiring yet change the ecu first. during the shaking...i noticed the rpm fluctuate a bit..from 800rpm to 500rpm..5. sorry myvi don't have distributor. does your rpm fluctuate up down? any engine light on? do you do periodic service as recommended by car manufacturer? i think it's your 3x spark plug ignition coil assy (see pic below, connected above spark plug). check it and if your car is already 100-150k might want to just change it. note: i'm not a mechanic or expert, just fellow car user (not myvi) engine light is ok..no issue.. yes,i service at perodua SC every 10k because my car already reached 138k oh, is it? will have it checked and replaced it then. QUOTE(vr2turbo @ Nov 16 2011, 03:45 PM) SC trial and error also, because don't know what is wrong? ya, they also dont know what is wrong with the car,then they go changed everything from ECU,spark plug and air filter..then they cleaned the throttle body and finally, they told me that this is the wiring harness problem, simply because..they have changed every possible solution that they could think of and they say that this is the wiring harness and not other than that. i asked them if i changed this harness and the problem re-occurs, what will happened? they told me that they are very sure that it is the wiring harness.. |
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Nov 16 2011, 07:16 PM
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#24
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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QUOTE(Jason @ Nov 16 2011, 06:07 PM) i thought TS left the car with perodua few days? hehehe. ya, i left it with perodua from thursday till now..after several days, they called me and told me that the expect 2 issues on the car which are the ECU and the wiring harness.but then i dont understand why is the wiring harness of the engine is capable of making my car shaking like its going to die..fo example..its like you're gasping for air and its like you're going to die..that is the exact situation i'm having when my car shake and choked for air during idling. |
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Nov 17 2011, 01:22 PM
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#25
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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QUOTE(felicia666 @ Nov 17 2011, 09:19 AM) This problem is very elusive. Will not appear when you want it. I left my car with sc for several days also cannot detect the problem. On my car, after replacing some parts it disappeared for several months and then re-occurred again. hoh,thanks for the links!..its very useful. The jerking you're experiencing I think is due to engine mis-combustion. I suggest just change the ignition coil assy as I understand cars 100k onwards may have degraded ignition coil assy and cause jerking at traffic lights stop. Interestingly enough, I serviced my car every 10k at sc yet they failed to recommend replacing this part before breakdown happens. Symptoms of bad spark plug coil assy:- http://www.ehow.com/about_5076673_signs-ba...plug-wires.html http://www.ehow.com/list_6426093_signs-bad...ition-coil.html How to troubleshoot spark plug assy:- http://www.ehow.com/how_5409517_troublesho...e-symptoms.html http://www.ehow.com/how_7285852_check-plug...multimeter.html About engine lights, I meant any of the red displays/warning/error code lights that appear briefly on your speedometer display. Take note of it. Have you done any sound system modification on your car? This and the wiring might affect the electricals but I not sure it'll cause jerking. yup,already checked.no engine or warning display. my car is completely stock except for my air filter, air intake and my spark plugs which is using denso iridium IK20 in which it is recommended my SC itself as this type f spark plugs will last longer and more efficient than regular spark plugs. |
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Nov 17 2011, 11:20 PM
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#26
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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hey guys,just got the car back..the SC changed the harness wiring and they changed the spark plugs for free..its the same spark plugs that i'm using which is denso irridium..dunno why they gave me free of charge..
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Nov 18 2011, 09:21 AM
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#27
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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seriously? change wire harness is such a big issue is it? does the harness wire was build to last a lifetime? ya,will be doing a complete check and see if the problem arises after a few month.
anyway, i've already checked with the SC, the ignition coil assy does not need to changed as it is build to last until 250k km.. and the ignition coil assy is still ok based on his story.. |
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Nov 19 2011, 08:25 AM
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#28
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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QUOTE(felicia666 @ Nov 18 2011, 12:32 PM) I'm certainly keen to know if the wiring is the real cause of it in the next few months. ya, they say, aybe the on that they changed got some problem,so they changed to a newer ones at no cost..Ignition coil assy can last a lifetime but people do change at half life when it starts to degrade. How come sc concluded that the ECU and spark plugs is ok earlier on then later changed it? Makes no sense. I thought you already changed the spark plug earlier? You changed it again? Did they return you the old spark plugs? Free expensive high performance spark plugs sounds fishy. I'd stick to original spark plugs if I were you. Good luck dealing with the sc! earlier on, they could not detect the problem because simply the problem does not occur when the car was with them, the second time i handed the car to them, after a few days, then the problem occurs. then they start bombing me with phone calls telling that this might be ECU problem, spark plugs problem, throttle body problem, piston problem, wiring problem, transmission problem and so on..so many problem might just change to a newer car liao.. they changed it for free..so i get my old old spark plugs back which has only run for 40k now..still left another 60k on the spark plugs life, the second spark plugs in chich they say was faulty and it only runs for 5km oni..haha..they gave me for free lo..what to do..  QUOTE(vr2turbo @ Nov 18 2011, 01:55 PM) Now, I wonder how come SC have expensive sparky also? back then, they have this promotion on the denso iridium spark plugs..but i'm not the one who sends the myvi for service..so my dad changed from the regular spark plugs to the new iridium spark plugs which cost 180 back in 2010..now dunno how much liao coz already 2011..and they only stated FOC for the denso iridium spark plugs on the paper. |
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Nov 19 2011, 11:51 AM
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#29
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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2 times..now i'm using the 2nd spark plugs that they are giving me for free
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Nov 19 2011, 03:40 PM
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#30
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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hopefully itwill.anyway..thanks a lot guys..will close this thread now!..
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May 12 2017, 11:51 AM
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#31
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Junior Member
349 posts Joined: Jan 2008 From: Puchong/Sunway/Subang Jaya/Shah Alam/Klang
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QUOTE(olman @ May 11 2017, 07:55 PM) Dei i know this is very old thread but is your myvi issue fixed? Its the engine mounting. Change it and problem fix.Am having similar case but doubt it is totally the same |
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