junyea

So I have a 2008, Automatic G.

THis has NEVER happened before. Going on 20 months of ownership. Get into my car from going to the mall. I step on the brake, press the start button, car starts up, and turns off.....WTF

Do the same again, car repeats the pattern of starting, and shuts down...

The third time, I immediately gave it gas, and that kept it on. I had just filled up the tank right before getting to the mall. I use 91 octane.

Should I just keep my eye out for this happening again, or should it be taken into the dealer ASAP?

SkyMG37x

I assume when you say it shut off the engine couldn't maintain RPM and sputtered/stalled. By holding the gas down you were able to keep it running until the condition "cleared" itself.

There are several reasons this could happen and while I wouldn't be worried if it happens again you should have the dealer check it out since it's still under warranty. Here are a few possibilities:

• Since you just filled the tank it's possible the gas you used is causing a lean condition where the engine stalls.
• The ECU is not reading one of many sensors correctly and therefore is not able to control the idle RPM correctly. For example if the MAF sensor is fouled due to air filter oil it may not be able to send the ECU the correct airflow or air temp reading which would result in an incorrect fuel/air mix control.
• The engine was warm and an engine temp sensor was not reading the correct temp.

Just some ideas. I've seen this on occasion myself and would not happen again. Keep an eye on it.

Black Betty

iTrader: (60)

Weird. I'd definitely say take it straight to the dealership, but if they can't duplicate the problem, they will be at a loss as to what the cause is and unable to give you any help at all. I'd say that the next time it does it (if it ever happens again), call and have it towed to the dealership. Then they will see what it's doing for themselves.

junyea

That is exactly what happened. Instead of the RPM staying around 1ish, it just flat out died.

It didn't turn off on my anymore. When I got home I turned off the car and restarted it to see if it would act up. On the second try, it almost died but it was able to revive itself. I'm gonna keep a close eye on this....

Thanks for the responses fellas!

ucla bruin

iTrader: (7)

Happened to me before. Do you have an intake?
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junyea

No intake. My G is fully stock.

silverg35sport

i would say MAF sensor, this exact same thing happened to my other car and it was the maf sensor.

ucla bruin

iTrader: (7)

^do you have your paper still?
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silverg35sport

what paper?

ucla bruin

iTrader: (7)

paperwork from the dealership specifying exactly what was wrong with the MAF sensor.
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silverg35sport

it was on my bmw, and i worked at the dealership at that time...idk where the paper work is

DrJones

iTrader: (1)

does sound like it could be the MAF.... I'm no mechanic but after reading it fits.

http://www.autoshop101.com/forms/h34.pdf

ucla bruin

iTrader: (7)

^nice find!
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silverg35sport

told you!!!!

ucla bruin

iTrader: (7)

Haha, I didn't doubt you. It's just that I've had the problem before but I have an intake. It didn't happen for a while after I got it, so I don't think it's the intake. But I'm sure the dealership will try to blame it on the intake.
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