Vios idling too low

[tylerfoo]

Hey, my dad's Vios(dugong) idling too low and sometimes can lead to engine stalling.

He went to Toyota service centre and this is what the SA told him.
"Vios is meant to be used with RON97 petrol, RON95 use d will leave carbon, that's why the ECU adjust the timing become like that. Cannot adjust timing manually also, so you need to bring your car in for diagnostics"

WTF? Vios is meant to be used with RON97?
What bullshit is this guy saying?

What to do now? Really can't manually adjust timing?

 

[yeehau86]

is there a check engine light?

check your throttle body, it could be the TPS or ISCV sensor went faulty.

 

[DanzEterna]

wah..didnt know vios is a sports car....
if u go to SC, thats the kind of answer u will get.......
u cannot adjust the throttle body screw meh like older cars? i dunno vios dugong got anot.....

 

[Izso]

Is your dads vios stock? No DIYs or anything done on it? If you did the fuel filter DIY OCT, that will need to be checked. When it's full or clogged idling will suffer.

If not, I suggest you try resetting the ECU yourself, plug out the battery terminals and leave it out overnight. Next morning plug it back in and drive normally.

The others is what Yeehau said, clean your throttle body first. Sometimes you might have a slightly opened TB because of dirt or whatever that's clogging the swivel joints. If it's more-than-slightly open at idle it'll suffer too.

Vios wasn't designed for RON97 only, that's bullsh*t. Swift sport, Civic type-R, Lambos, etc yes.. Vios no. Besides, the ECU is smart enough to adjust itself in terms of ignition timing if a lower octane fuel is used so that SA fella is a dumbass or just taking you for a ride to Timbuktoo.

 

[jeffayn]

is just a bunch of bs for the 95 97 story.... the carbon deposit never got anything to do with that...
timing adjustment is almost impossible done manually, it involve idling rpm, injector flow rate and ignition timing...

most of the time, over time, when car get older they do tend to be idling lower rpm, this is due to the wear off of your autoparts and they are no more in their tiptop condition as a brand new car would. A close maintenance and service will prevent this for a very long time compare to those who dont...

another most seen scenario where the car behave diff, is a changes done to the car which you are unaware of the result of such changes.

pulling out the battery and leave it for days to make sure it goes full 'reset' is a workable way, but always have decent mechanic to get it done right always make thing easier...

 

[monsh]

service throttle body and ISCV then reset ECU see if it helps :)

 

[bongbong10]

clean ur throttle body..:) have same symptoms with my friend vios and wish..

 

[kazukimy]

which service center u go to?need to tell their service manager ady,giv wrong info,who said dugong cant use ron95..zzz in the manual got stated la...zzzz

 

[DanzEterna]

vios dugong TB so fast dirty ah? my car used 6 yrs also havent cleaned TB before

 

[jeffayn]

i seen real people drive new city require overhaul within first year of driving... not flood not mechanical problem, but that driver just use the car no servicing, no love for the car.. as the result.. overhaul...

the check light (aka engine light) will light up when if a component fail or so call recognize as fail. if a part is failing (mean going to be fail) ... the light wont up too...

 

[Kevinho]

My manual says what fuel to use for the dugong. Lol SA wanna mess with you.

 

[vr2turbo]

Wah! you reading all the old thread and post also......

 

[Kevinho]

yea bro .
I'm learning how to service the vios, resetting ecu etc. lol

 

[vr2turbo]

yea bro .
I'm learning how to service the vios, resetting ecu etc. lol

Is good to read and digest what have been posted before, rather than asking the same question again.....lol

 

[Kevinho]

my vios idling gonna stall also when i reset my ecu lol. the engine shake alot until the chasis also shook but after letting it idle for 10 minutes and drive 3-4km to petrol station then come back, the engine idling rpm higher abit dy, it was 400 rpm idling before this, now around 500-600 rpm.

 

[^pomen_GTR^]

my vios idling gonna stall also when i reset my ecu lol. the engine shake alot until the chasis also shook but after letting it idle for 10 minutes and drive 3-4km to petrol station then come back, the engine idling rpm higher abit dy, it was 400 rpm idling before this, now around 500-600 rpm.

is normal... there is idle learning procedure...

the correct method usually after reset ecu/remove battery is by:

1- let cold idle (no ac,no radio,no lights used) for 10mins (until radiator fan turning once)

2- turn off engine...restart again...wait 1 mins for idle settle...then turn on all ac, radio, lights.. let it idle for a few mins (until idle stable again)...


then just drive normally and let ecu relearn for fuel and ignition timing during your daily normal driving...


thats all