I am driving VIOS Manual Type J. Each time when I stopped my car at traffic light or caught in jam, my car engine will gradually die. I have to press the accelerator pedal prevent the engine stop. Anyone know what's the reason? how much of the repair?

This post has been edited by lavendershuin: Jul 20 2013, 12:48 AM

dont nid repair just nid to adjust~
go shop tell ur situasi to them, there will know how to adjust it...
i forgot what it call already...
adjust only dont nid repair

This post has been edited by monkeybar: Jul 20 2013, 12:53 AM

Thanks. What to adjust? roughly how much for this minor adjustment?

possibly vacuum leak?
better do a check up at workshop.

Happened to me once (different car), changing the plug coil solved the problem.

This...

O2 sensor dead. Common problem for Vios.

My friend stalled when traffic jam, luckily replaced under warranty. 2 O2 sensors around RM1,200 if replaced at Toyota.

impossible! vios god car, how can it stall? impossible.










This post has been edited by Quazacolt: Jul 20 2013, 09:06 AM

is it hybrid and running on eco mode?

ahhh wahhhh minor adjustment need RM1200

Another possible scenario is you have just change the battery, which will have weird idling (almost die or just die). Just about one or 2 or 3 drives it will back to normal.

That's the problem with modern cars - sensors everywhere.

Keyword here: "Replaced at Toyota"

If you car is out of warranty, you can get it diagnosed at Toyota SC, but replace at outside workshops which should be much cheaper.

Oh also it could be another sensor which is at fault, the MAF sensor, which is also RM600++ at Toyota SC.

must be kidding toyota got no common problem. all the common toyota problem is because of the owner.

That is to say, the only common problem the Vios has are owner problems

No owner = no problem

This post has been edited by dares: Jul 20 2013, 11:21 AM

what is ur RPM meter (located beside speed meter) indicate when your engine idle? if less than 1 then maybe need to go shop to adjust the engine timing.. adjust timing usually free.. low engine timing will also cause it to die at traffic light if u did not press acc pedal..

lol........... you thought start-stop function meh?

Vios dugong has drive-by-wire throttlebody. You can't adjust the idling like a cable-driven throttlebody.

owh vios no this function aaa? sorry...cos i tot vios no problem one..

if it is ignition coil/spark plug, the engine will vibrate abnormally even at rpm >1.2k.
if crankshaft positioning sensor dead, need to press hard on accelerator, the rpm will raise up but engine no torque (from my experience).
If it just dead on idling, then could be vacumn leak, or fuel pump... i think.
Also check oil/water/temperature if they are in normal.

Bring to service center to check all the sensors.

This post has been edited by Alan: Jul 20 2013, 12:04 PM

Nice explanation, thanks bro...

Paging viosTRD

This post has been edited by DoomCognition: Jul 20 2013, 12:26 PM

Could it be simply caused by dirty, oily throttle body?

Manual start stop function lah. Engine stops itself, but owner has to start again.

At least it is half-decent then

This post has been edited by dares: Jul 20 2013, 01:53 PM

my opinion is the RPM is too low that the engine die
i dn't know abt vios
but my dad's waja last time got this problem...the RPM is too low
he took to workshop, they adjusted it...thn its gine

inb4 vios best car in the world
inb4 toyota engine will not die in traffic light
inb4 isolated case
inb4 driver's fault, not the car

inb4 no buy TRD Sportivo spec

I think it's kinda common for the new 4-speed gearbox.

My dad's Camry also like that. Rpm go super low then raise back again when come to a stop. But not so serious until engine stop.

TS u can try to shift to N first before the car stops.

Yes mr. Genius. Do drive your dugong to any outside workshop and ask the mechanic to adjust the idling RPM for you, then come back here and tell us he whack your head with a spanner or a hammer.

Dugong uses drive-by-wire throttle control, the only way you can adjust the idling RPM is to tweak the ECU. The only Vios that can adjust idling RPM old-school style with a screwdriver is the old gen Vios, which uses cable-driven throttle.

lulz

Old and New Vios also use ECU.

Old Vios has cable-driven throttle, therefore you can send to outside workshop to adjust idling RPM.

New Vios (dugong) use drive-by-wire throttle, therefore outside workshop cannot adjust the idling.

Understand the difference?

Sorry... from what I know there is nothing to adjust. Problem is elsewhere.

What do you adjust for cable driven throttle?
- The throttle opening ?? it should be the IACV that control amount of air going in right?
- The TPS sensor position ?? unless something was changed at the TB, the TPS sensor should not be touched.

In the TS's case the problem memang is elsewhere, I suspect the O2 sensors as his case is similiar to my friend's.

For cable throttles, there is a screw on the throttle body that directly adjusts the throttle valve opening when idling.

O2 sensor faulty normally got check engine light.... plus bad fuel economy. Have to scan for fault code and monitor closed loop feedback with OBD2 scan tool to check.

Never worked on a Vios engine.. but normally throttle valve is fully closed during idling for cable driven TB. Air metering in to keep engine running in idle is control by a separate IACV.

Very weird that Vios doesn't use similar setup with IACV but got screw to adjust throttle valve directly for cable driven.

My guess is O2 sensor faulty will only throw up CEL if it is not responding. If it is feeding bad data to the ECU, the ECU won't know anything is wrong. My friend didn't encounter CEL also until he completely stalled.

the idling screw serves as some sort of easy override on top of the IACV control. This is not limited to just the old Vios, most cable driven TBs have this.





EDIT: my mistake, it doesn't adjust the throttle valve directly, but rather the opening of an alternate air flow route.

This post has been edited by dares: Jul 20 2013, 05:56 PM

Ah... ic ic... there is another separate path for the air... adjusting screw does not mess with the throttle valve position.

Yep, edited my above post to mention that, my mistake