Bumbobee

Hey guys,

Today I was coming back from a long trip to the lake (450 km) and the car was running great. I dropped someone off, then started the car back up again, it idles rough and died. I tried a few more times and same thing.

I finally held one foot on the brake, one foot giving it a little gas so it wouldn't die, and I managed to shift it into gear before it died. I made my way home, the car felt a little funny as if there was a jerkiness to acceleration. It would also idle rough in gear at stop lights but it didn't die.

There is no check engine light.

I replaced the oxygen sensors, knock sensors, a while ago, maybe 5000-6000 km ago. Car was running fine all this time.

What could it be?

ES300NZ

gee .. that really could be alot of things.
- vaccum leak, ripped inlet pipe, etc.
- bad MAF,
- bad water temp sensor,
- poor fuel/part blockage or fuel filter obstruction,
- bad coil (s)
- bad earth, or poor earth connection
- VVTI sensor failure.

- a glitch. with the ecu, it learned something wrong and now needs a reset. (start here it's free)

speedkar9

Idle air control valve,

www.youtube.com/watch?v=i82s4ZfR2js

Bumbobee

Will try the reset.

MAF sensor is new.
VVT sensors are new.

Will try cleaning the IAC.

Bumbobee

Just cleaned IAC and throttle body, did not help, problem still there.

PFB

If you filled it up recently, could it be that you got a bad batch of fuel somewhere on your trip?

Bumbobee

Filled it up with Shell V-Power 91 no ethanol in a Toronto gas station. First time running 91 octane in a while, and I think first time since changing all the knock sensors and oxygen sensors etc.

Bumbobee

Brought it to the mechanic and he said it's probably the IAC valve.

He said he will try and clean it and see what happens. If not going to have to order a new one from rock auto. Here in Canada parts source wants 297 + tax for one...right...

Bumbobee

Mechanic took out the IAC valve, cleaned it, let it soak over night. Put it back in and car works.

Thank god!