hey guys,

i have a problem where my car is literally shakes like hell when i dont step on the gas.it happened a couple of days ago and its getting me worried. It seems like the shaking came from the engine itself but i cant confirm whether or not its a transmission problem or a spark plug problem or is it something else going on inside the engine itself. The engine itself is shaking and choking like its going to die on me. Does anyone have encountered this sort of problem before and what are your countermeasures? Any sifu please help especially myvi sifus..i'm driving a myvi 2006 auto.

Thanks.

My first guess : one or more of your spark plugs have expired.

Throttle body dirty? Just a wild guess

bro dares,

is it? i'm using denso iridium spark plugs..will try to open up the spark plugs and see if its OK.

bro Shawnzz,

i've opened up the air filter and see the throttle body..seems ok i think but anyhow will try to open up again.

Update:-

now every gear is shaking and choking...gear 1,2,D,N,R and even P..i think i dont have much time left with this car..please do help me..

I experience this before, when not pressing the throttle the engine chokes as if it's gonna stall. Everytime slow down when making a turn also shake like driving an old car.

Mech replaced the spark plugs and everything was OK again, which is why I suggest to check the spark plugs.

If not the spark plugs, then maybe the plug cables or the alternator. Send it to the workshop and check.

Yup, too little info given. Please send to mechanic for check up.
To me probably low idling speed, because when step on accelerator you mention okay, right?

check ur map and maf sensor also..

I see...d mechanic suggested me to change the fuel pump and i've changed to a newer one..but i think that is not the problem..will try changing to a newer spark plugs tomorrow.


apparently, the idling is OK..it stays at 800rpm during the shaking. but will try to visit the mechanic tomorrow morning.

oh,ok bro..do you guys know any good mechanic around sunway which has the myvi module? because my dad's mechanic doesnthave the myvi module..he told me to go to SA to check the ECU.

Was that the same mechanic who ask you to change the fuel pump??

Could it be mounting problem?

ya..its the same mechanic..sigh..after changing d fuel pump, and the problem still persist,he told me to go to SA to check on the ECU. Will have it sent to perodua glenmarie to scan the ECU tomorrow morning.

I've changed my mounting to a newer one a couple of months back.I dont think its d mounting problem.

This post has been edited by botack: Nov 7 2011, 11:53 PM

Use regular spark plugs and check the air filter. If u use insert-funny-metal-name-here spark plugs u have to make sure that the heat range is correct. Drain the fuel tank abit just in case water collected inside.

This post has been edited by ceo684: Nov 8 2011, 03:05 AM

Just hate those mechanic trial and error by changing parts and cannot locate the problem.....

why don't you get a set of original spark plugs and see first? it's no more than 50odd bucks

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Added on November 8, 2011, 2:52 pmwhy don't you get a set of original spark plugs and see first? it's no more than 50odd bucks

This post has been edited by ThunderGod_Cid: Nov 8 2011, 02:52 PM

One set normal plugs only around RM20.....

guys, already changed to a regular spark plug..will see the condition of the car for a couple of days..perodua glenmarie told me that they could not find any problem with the car..they've checked the ECU and spark plugs but everything is normal..i'm puzzled..

really aa?i changed to a regular spark plugs from SA..cost me rm30 woo..they say..its original and its NGK..

Try checking the spare part shops.....

bro, try disconnect the battery negative terminals and leave it overnight..next morning, re-tighten the battery positive and negative terminals..might help hopefully..

You mean to reset the ECU?

bro, is this to reset the ECU?

Probably, but no need overnight, just a while will do......

I see,but the Perodua Technician informed me that there is nothing wrong with the ECU..until today..no shaking at all..does this mean that the spark plug is causing all of this unusual shaking?

So after changing the spark plug the car is back to normal?

If so your problem is most likely solved.

Since the only thing you change were the plugs, then probably was the plugs......

guys, this morning, the same poblem happened again..th car feel underpower at all rpm range..idling rpm is almost 500. is there a possibility that one of the piston has gone bust?

Main Perodua SC kenot identify & rectify prob? Something's very wrong....

Ignition coil?

guys, i've been thinking, does it have anything to do with the 'tepet' (i don't know how to spell it but often people adjust the tepet)?

Not piston gone bust. Piston kaput cannot start even......

Some ignition timing out, plug wire leak......

does myvi have a wire plug? i thought all myvi uses distributor...

myvi uses coin on plug.

Have you cleaned the throttle body lately?Now we can already rule out the plugs so no worries.

no, i didn't clean the throttle body..but i've open up the air filter and did not found anything unusual on the throttle body.

clean it up. That's one everyone said... until I inspect it myself

ok,will try to clean up the throttle body..but out of curiousity, does it have anything to do with the tepet?do the tepet need adjusting?

edit:-

the correct word is engine tappet.

This post has been edited by botack: Nov 10 2011, 12:17 PM

If noisy then needs adjustment.....

i've sent the car back to perodua and let them drive the car for a few days to determined the real problem..hopefully they will know what's wrong with the car..

tappet sound is when u tekan, the sound is krek krek krek (like running a manual in too high a gear, not enough rpm)

Tappet if loose, idling also have sound. If tekan got sound maybe knocking already......

but this one..if tekan.only vibrate a little oni..but during idle it gives a knocking sound..i can hear the sound clearly..

Problem is, it is intermediate, right? Sometimes okay, sometimes knocking. Like that really need to leave there at the SC for check up.....

ya..sometimes the car is running smoothly..no issues at all..then all of a sudden..the problem starts and then it is ok again. the funny thing is, when i was on my was to SC, the car was shaking the whole journey. right after i enter the SC..all of the shaking is gone..and went for a test drive with the mechanic..the car is OK, no issues at all. *this car is playing games with me*

This is normal, happen to me a few times also. Most of the time I am able to diagnosis the problem, so I will just tell my mechanic, but of course at times there are special cases that I don't know what is wrong also, and every time I reach mechanic shop everything is okay.
I remember this case when the car has warmed up there is a creaking sound coming from the right front wheel, so mechanic, take out wheel to check, jack up with wheel on, jack up whole car to check under carriage but still cannot find the problem. Problem is once it cools down slightly no more sound.
So got one time when the sound came, I drove all the way to the mechanic, and ask him to check immediately, so he jack up the whole car. This time he had his workers to move the car up and down as like going over the bumps that creates the sound. He finally found the sound coming from (you will never guess) a dried up tie rod end but the left side one, not the right side one. The sound channeled itself to sound like it came from the right......

damn...its quite troublesome to identify the problem if that is the case. and it consumes a lot of our precious time just to identify the problem. but in your case, you have a good mechanic there..i puts in quite an effort to rock your car in such a way just to replicate how the car moves when going over a bump. most of the mechanics i've known will not go to such extent just to find the right problem..hence they opt going for the guessing game.

Yup, it is true. He had a new customer who was introduces by one of his customer. The new customer have some jerking problem when driving and mentioned that previous mechanic he sent to had changed the spark plugs, the plug wires, the distributor cover and a whole lot of things already and still not solved. So he got fed up paying for all the things changed but problem not solved.
My mechanic after checking his car called me up because I happen to own a similar car and needed to try out the ignition pack. So I drove over and he use my car parts as guinea piggy . Yup, the first thing he transferred over and the car was running fine, so he just ordered that part and changed it. The new customer was so happy, so became his long time customer now....

woo..where r u living?if its near sunway area..then i can oso be a long time customer to your mechanic if that mechanic have that sort of commitment and passion in solving his customer's car problems..anyway,i still didn't hear any news from perodua regarding my car..its been 3days of testing..if they couldn't find the source of the problem,then i give up..sigh..

Let them try out first. SC have all the equipment, but not sure of the personnel only.....

My mechanic is in Puchong.....

.

This post has been edited by felicia666: Dec 2 2011, 12:04 PM

Guys,after 4days of extensive test drives..they finally concluded that the problem is the car wiring.they changed the ECU, spark plugs,cleaned the throttle body and checked the pistons but couldn't find any problem and they told me that their last bet is the wiring of the car..whats the connection between the wiring of thecar and the engine? I just don't get it..my friend told me maybe thereis not enough electricity going to the engine..doesn't make sense to me. But last time, i remembered my dad changed his wiring harness for his benz but forgot why and he also forgot why he changed it. Does anyone have any ideas? It will cost me 700 to change to a whole new wiring system.

You car have many wires and cables, did they say which one?

If it is the ones going from your alternator to your spark plugs, then it makes sense since they are the ones supplying electricity to your spark plugs. (Sorry, I dunno how the spark plug cables are set up in a Myvi, but that's the gist of it anyway)

they say that its the harness wire..the wiring to the engine...

Could be an intermittent problem with your wiring, but have you asked them what happens if it is not the wiring harness problem?? Change for nothing? Not cheap woh!

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.

.

This post has been edited by felicia666: Jun 2 2012, 02:05 PM

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.
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.

I think Myvi is direct coil over spark plug, right? If that is the case, then no distributor.....

.

This post has been edited by felicia666: Jun 2 2012, 02:05 PM

SC trial and error also, because don't know what is wrong?

during the shaking...i noticed the rpm fluctuate a bit..from 800rpm to 500rpm..
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.

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..

Because like you say, they already change almost everything......

if it really was wiring issue, the OBD-II scanner in the service center would have picked it up. (duh)

another cheap solution might be grounding.. just fyi..myvi has very poor grounding, even brand new myvi, after installing quality voltage stabilizer and grounding kit can see consistent gains on dyno.

Problem is only at certain times, the problem surface. When hook up and running fine, cannot detect.....

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.

If SC with all equipment cannot detect the problem, then finish loh.....

.

This post has been edited by felicia666: Jun 2 2012, 02:13 PM

hoh,thanks for the links!..its very useful.

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.

.

This post has been edited by felicia666: Dec 2 2011, 12:06 PM

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..

Wire harness also, probably scare you complain to media, wire harness also need to change then spoil reputation........ha! ha!
Anyway, check and see if the problem still arises. If not, then congratulation, your problem solved.....

This post has been edited by vr2turbo: Nov 18 2011, 08:18 AM

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..

Wire harness of the car is like the blood arteries and veins in human. Connects the ECU to every part of the car, that is engine compartment, under the dash , under the carpet too for connection to the rear for control of the lights behind.
There are many many tiny wires inside all wrap up, so if there is a fault, they cannot pinpoint where, then the whole harness have to be changed.
Read more here:-

http://www.sws.co.jp/en/product/wireharness/car.html

.

This post has been edited by felicia666: Jun 2 2012, 02:06 PM

Now, I wonder how come SC have expensive sparky also?

ya, they say, aybe the on that they changed got some problem,so they changed to a newer ones at no cost..

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..


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.

.

This post has been edited by felicia666: Jun 2 2012, 02:06 PM

2 times..now i'm using the 2nd spark plugs that they are giving me for free

Just hope the problem is solved.......

hopefully itwill.anyway..thanks a lot guys..will close this thread now!..

Dei i know this is very old thread but is your myvi issue fixed?
Am having similar case but doubt it is totally the same

maybe distributor issue.

MyVi don't have distributor.

Its the engine mounting. Change it and problem fix.

Check the fuel injector.. a problem where the engine diagnostic cant pick up..

Hhmmm, my rpm drops to 500 or might be abit lower then it vibrates alot.

Possible for outside shop to adjust rpm higher?

Check for misfire, vacuum leak, Map sensor, or the basic, clean throttle plate first.

There is no easy way to increase the idle rpm with ignition coil system.

It goes down when idling, its fine while moving

I just service engine oil + change spark plugs but its still there.

During service i see the throttle body that round cap is still clean. What determines it to be dirty?

A dirty throttle plate is either sticky or with very thick carbon buildup.

Guess you will need to go with the easier one first then. Remove the map sensor see if the idle rpm stay the same go crazy. If remain the same means that something is not right with the sensor.

Vacuum leak will be harder to check. One of the example will be brake vacuum leak. If the rpm is affected greatly when depressing the brake then there is leak with somewhere connected to the brake system.

A dirty throttle plate is either sticky or with very thick carbon buildup.

Guess you will need to go with the easier one first then. Remove the map sensor see if the idle rpm stay the same go crazy. If remain the same means that something is not right with the sensor.

Vacuum leak will be harder to check. One of the example will be brake vacuum leak. If the rpm is affected greatly when depressing the brake then there is leak with somewhere connected to the brake system.