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Old 01-03-2008, 03:15 PM   #1
frederik
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Member#: 64405
Join Date: Jun 2004
Chapter/Region: E. Canada
Location: St-Georges, QC, Canada
Vehicle:
2003 WRX Sedan
WRB - Cobb Stg 2

Default 2006 2.5i - Wont start when very cold

This morning my girlfriend's 2006 2.5i wagon did not start. It was about -23 celcius outside. The battery seems to have plenty of power because I could try starting if for like 15 seconds and it had a pretty good speed. After about 4 or 5 attempts to start it, I tried to boost it with my car in case there was a problem with the battery but that didnt make any difference. Car rev'd a little faster but did'nt start. The gas tank was half full and the car was last started yesterday when it was already pretty cold (-10 celcius).

I also tried to push the gaz pedal completely and try starting ( I think this tells something special to the ECU but I dont remember what, at that time I was pretty sure the car was flooded anyway).

She took my car to work, and I worked from home. I tried to start it at noon (it was -13 celcius then) and it started fine. Rev'd for 2 seconds and started. Did'nt look like it was flooded, engine was running fine (I guess if it was flooded the engine would not run so smoothly ?). Did'nt see the color of the smoke though.

Sounds like there was no ignition or no fuel. What should I look at first ?

Spark plugs ? (the engine would have been be flooded)
Spark plug wires ? (the engine would have been be flooded)
Fuel starvation due to water in the tank ? (this car was into an accidend on the rear passenger side, maybe this has something to do with it, like water entering the tank)

What are the other possible causes of fuel starvation ?

I will go fuel the car if a while, if it is a problem with water in the fuel freezing, should I put something in the tank ? If so what is the name of this product ?

Thanks for any help.
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Old 01-03-2008, 05:16 PM   #2
frederik
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Join Date: Jun 2004
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Location: St-Georges, QC, Canada
Vehicle:
2003 WRX Sedan
WRB - Cobb Stg 2

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So what do you think ? Is it possible that bad gas is causing issues even if the tank was half full ?
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Old 01-03-2008, 06:03 PM   #3
gboezio
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Location: Victoriaville, QC, Canada
Default

Well maybe you have a dying fuel pump, next time it does, try loosening the fuel rail supply just a bit, with the key on running position, the fuel should be pissing out. Also you should hear the pump prime when you turn the key(need help from someone turning the key for you) throw a few bottles of fuel line antifreeze in the tank to make sure you don't get water, better, fill the tank with a 5 % blend of ethanol gas from the CO OP close to where you live. Good luck neighbor
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Old 01-03-2008, 06:27 PM   #4
frederik
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WRB - Cobb Stg 2

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Quote:
Originally Posted by gboezio View Post
Well maybe you have a dying fuel pump, next time it does, try loosening the fuel rail supply just a bit, with the key on running position, the fuel should be pissing out. Also you should hear the pump prime when you turn the key(need help from someone turning the key for you) throw a few bottles of fuel line antifreeze in the tank to make sure you don't get water, better, fill the tank with a 5 % blend of ethanol gas from the CO OP close to where you live. Good luck neighbor
Thanks for the reply !

I remember I could hear the usual fuel pump sound, 2-3 seconds hisss when putting the key to the ON position.

I have a few questions :

1) Where is located the fuel rail supply that I should loosen ? Do you have a pic that I could see it ?

2) How is called the anti freeze stuff that I should put in ? I guess I can find that in any canadian tire ?

3) You said I can find Ethanol fuel blend, I think "SONIC" have this kind of fuel here is St-Georges, is that what you are referring to ? Do you think water in the tank is usually a one time occurence (you fill the tank with ethanol blend or add fuel line anti freeze once, and it should not happen again), or there may be a reason why water entered the tank that will cause this to happen again and again ?

Unfortunately I already filled the tank with premium 91 octane, instead of the usual 87 octane my gilfriend is usually using, so I cannot try the ethanol blend for now..

Thanks !
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Old 01-03-2008, 07:07 PM   #5
gboezio
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Actually I was just browsing this site because I'm thinking of buying a subaru and searched mechanical stuff, so I can't tell you exactly what it looks like on a subaru I'll check later on. Usually it's a hollow bolt fitted to the pressurized fuel line coming from the tank, it's hooked up to the metal fuel rail running on the top of the injectors, the tail of the fuel rail has a pressure regulator, then goes back to the tank as hot fuel.

Yes I refered to Sonic, my bad, here in Victoriaville it's the CO OP, fuel line antifreeze is basically alcohol, you just gets way more than a few bottle filling the tank with ethanol, same stuff.

As the way water enters a tank,

1- Moist air enters the tank as temperature was mild a few days ago, then drops way under and all the moisture condense in the tank
2- I worked at the Ultramar dist center in east Mtl and I can tell you many stories where water was high enough to reach the pump pipe and many cars stall this way, but they usually don,t make it past the entrance and most of time never restart.
I doubt the tank can let water in, it would pour fuel and smell a lot.
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Old 01-03-2008, 08:06 PM   #6
240c
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Chapter/Region: MWSOC
Location: Fostoria, Ohio
Vehicle:
1997 Outback
Blue/grey

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Quote:
Originally Posted by frederik View Post
This morning my girlfriend's 2006 2.5i wagon did not start. It was about -23 celcius outside. The battery seems to have plenty of power because I could try starting if for like 15 seconds and it had a pretty good speed. After about 4 or 5 attempts to start it, I tried to boost it with my car in case there was a problem with the battery but that didnt make any difference. Car rev'd a little faster but did'nt start. The gas tank was half full and the car was last started yesterday when it was already pretty cold (-10 celcius).

I also tried to push the gaz pedal completely and try starting ( I think this tells something special to the ECU but I dont remember what, at that time I was pretty sure the car was flooded anyway).

She took my car to work, and I worked from home. I tried to start it at noon (it was -13 celcius then) and it started fine. Rev'd for 2 seconds and started. Did'nt look like it was flooded, engine was running fine (I guess if it was flooded the engine would not run so smoothly ?). Did'nt see the color of the smoke though.

Sounds like there was no ignition or no fuel. What should I look at first ?

Spark plugs ? (the engine would have been be flooded)
Spark plug wires ? (the engine would have been be flooded)
Fuel starvation due to water in the tank ? (this car was into an accidend on the rear passenger side, maybe this has something to do with it, like water entering the tank)

What are the other possible causes of fuel starvation ?

I will go fuel the car if a while, if it is a problem with water in the fuel freezing, should I put something in the tank ? If so what is the name of this product ?

Thanks for any help.
Its fuel injected never step on the gas pedal. All 06 2.5i have drive by wire thotles. By stepping on the gas pedal you might me telling the ECU there is somthing wrong with the thotle system and it will not start. My 06 2.5i always starts hard in the cold. If you had a warm snap and then got cold the tank could have water in it. Put in some dry gas in.
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