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03-03-2013, 05:00 PM | #1 |
Scooby Specialist
Member#: 43310
Join Date: Sep 2003
Chapter/Region:
SCIC
Location: LA, California
Vehicle:1978 Brat Silver |
2013 Stock STI smoke on cold startup
So yesterday I started my car after it had been sitting in the garage overnight and I was surprised to see quite a bit of smoke coming from the exhaust. It almost smelled like unburnt fuel had loaded up in the exhaust and when started it got pushed out turning to smoke. Sort of hard to explain. My car is 100% stock, in fact Wednesday I had an oil change done at the dealer. Tomorrow morning I am going to try to take video to see if it happens again.
Would an engine oil overfill cause some smoking on a cold start? Assuming this happens again I am going to the dealer.
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03-03-2013, 05:11 PM | #2 | |
Scooby Specialist
Member#: 290592
Join Date: Aug 2011
Chapter/Region:
South East
Location: Charlotte, NC
Vehicle:15 Outback, 15 WRX 6MT CWP |
Quote:
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03-03-2013, 05:53 PM | #3 |
Scooby Specialist
Member#: 155178
Join Date: Jul 2007
Chapter/Region:
NWIC
Location: Tualatin OR
Vehicle:2004 435 WHP EVO 8 Nasty silver |
mmmmm could be you know cold start lol man Subaru owners over the last few years have started going crazy.....
As soon as they see smoke the run to the forums thinking the motor is toast PS here is a hint let your car cool down IDK maybe a couple hours till the motor is cold then fire it up see what happens.... Also you have a 2013 if the motor is toast make SOA fix it lol if it is stock you have nothing to worry about |
03-03-2013, 06:21 PM | #4 |
Scooby Specialist
Member#: 269388
Join Date: Jan 2011
Chapter/Region:
SCIC
Location: SoCal SD / LA
Vehicle:2011 Impreza WRX obp |
Happens to me too. Meh. Havent really worried about it... What are exhaust fumes supposed to smell like anyways
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03-03-2013, 09:30 PM | #5 |
Scooby Specialist
Member#: 150494
Join Date: Jun 2007
Chapter/Region:
South East
Location: Charleston
Vehicle:20 Genesis G70 3.3 |
What color is the smoke? If it started right after an oil change the dealership probably overfilled it.
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03-03-2013, 11:05 PM | #6 |
Big Ron
Super Moderator Member#: 18062
Join Date: Apr 2002
Chapter/Region:
MAIC
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Vehicle:on car parts so PM me b4 j00 buy |
Take a deep breath. Relax. Crack your knuckles and roll your head in slow circles. I am not a member of the melodramatic squad here to tell you your engine will explode and cause death for miles. Generally speaking "smoke" is present at start up due to condensation in the piping due to rich starting conditions and will go away. It can smell like fuel depending on your nose. It is also 100% normal. Is the smoke coming out of the tailpipe look like starting at the 40 second mark? If yes, you should be concerned and call the dealer. Anything less, then you should have some General Foods International Coffee and think about something important as some smoke is normal.
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03-03-2013, 11:47 PM | #7 | ||
Scooby Specialist
Member#: 43310
Join Date: Sep 2003
Chapter/Region:
SCIC
Location: LA, California
Vehicle:1978 Brat Silver |
Quote:
I did a little more digging, popped the hood and noticed the breather hoses that run across the front of the inter-cooler were all disconnected. (Why do I bother going to the dealer if they can't connect my inter-cooler correctly? ) . Another thing is the little red elbow pipe that connects directly to the turbo, I noticed had either some type of grease on it. Almost as if the tech couldn't slip the elbow pipe back onto the turbo without greasing it up to help it slide on easier. If the tech had put some grease on it, would that maybe cause some smoke on start-up? Trust me the dealer will be getting a call from me in the morning. Who knows what else they didn't put back correctly. Quote:
I am going to have my dad video my startup tomorrow morning so I can get a good look myself. I will post a followup tomorrow. |
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03-04-2013, 01:50 PM | #8 |
Scooby Newbie
Member#: 348242
Join Date: Feb 2013
Location: Billings, MT
Vehicle:2013 Impreza WRX Plasma Blue Pearl |
What's the temp in the morning when starting? What color of smoke? Water vapor from the exhaust is totally normal if the temp is below 50* or so, especially if it's a little humid out.
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03-04-2013, 02:30 PM | #9 |
Scooby Newbie
Member#: 151448
Join Date: Jun 2007
Location: Reno
Vehicle:2008 OBXT 5spd Grey |
The real question is why the dealer needed to remove the intercooler for an oil change. It seems odd even for inspection purposes on a new car.
Running the car with those head/case breather hoses disconnected won't hurt the motor, but it will cause a breather pressure differential between the heads and case that may push oil into abnormal places. The breather hoses also tie into the turbo inlet. If they were disconnected, there would be a post MAF intake leak that would cause problems; perhaps the source of your rich start up fumes. |
03-06-2013, 08:21 PM | #10 | |
Scooby Specialist
Member#: 43310
Join Date: Sep 2003
Chapter/Region:
SCIC
Location: LA, California
Vehicle:1978 Brat Silver |
Quote:
The temp is around 70 degrees Fahrenheit in the garage in the morning. It was defiantly not water vapor. |
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03-06-2013, 09:30 PM | #11 |
Scooby Newbie
Member#: 47807
Join Date: Nov 2003
Chapter/Region:
South East
Location: Palm Coast, FL
Vehicle:2013 WRX STI Sedan Satin White Pearl |
Did you try unscrewing oil cap while engine is running? Make sure no puffs of smoke are coming out.
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03-07-2013, 12:05 AM | #12 |
Scooby Specialist
Member#: 43310
Join Date: Sep 2003
Chapter/Region:
SCIC
Location: LA, California
Vehicle:1978 Brat Silver |
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03-08-2013, 01:25 PM | #13 |
Scooby Newbie
Member#: 151448
Join Date: Jun 2007
Location: Reno
Vehicle:2008 OBXT 5spd Grey |
Perfectly normal. It's the impulses of air being pulled/pushed caused by the pistons moving in the crank case.
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