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Old 01-16-2012, 04:15 PM   #1
Big-E
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Default Gas smell, 2006 WRX

This is the second time in the past few weeks that I noted a raw gasoline smell and both times the temperatures were in the teens.

As of late, the weather here in Southwestern Connecticut has been relatively mild, with the exception of yesterday/today.

On both occasions, I let the car idle for a few minutes and then drove off. I continued for say about five to ten minutes and when at a stoplight, with the engine just about warmed-up, idling, and no other cars around me, I smell raw gas. Not too heavy, but enough for me to notice.

I drive off and the engine is now warm and continuing to stay warm. The next real stop (say a stoplight again) there is no odor of gas. The last time this happened, I popped the hood thereafter and smelled nothing.

W/o any other references for this model-year, a bad injector or fuel-line o-ring? The car is running super rich and just dumping fuel? I do not have any drivability problems.

Wait until next cold-snap and try to replicate driving to warm-up, let idle, hope for gas odor, stop car, open hood and try to smell for gas?

Any insight is appreciated.
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Old 01-17-2012, 06:39 AM   #2
DCales
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Tighten the clamps on the rubber fuel lines under the hood. My 06' has had similiar issues when its below 20 outside. The line that needed the most attention was on the passenger side towards the front of the engine. The clamp was hard to access and needed several turns to fully tighten.
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Old 01-19-2012, 08:08 AM   #3
Big-E
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Quote:
Originally Posted by DCales View Post
Tighten the clamps on the rubber fuel lines under the hood. My 06' has had similiar issues when its below 20 outside. The line that needed the most attention was on the passenger side towards the front of the engine. The clamp was hard to access and needed several turns to fully tighten.
Thank you!
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Old 02-12-2012, 09:48 AM   #4
KryptoNyte
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I'm smelling the same thing on 05 WRX. Mine also only happens when the temp is below about 20 degrees F.

Does anyone have a photo or diagram handy to identify this tube/tightening?
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Old 02-14-2012, 08:37 AM   #5
dictoresno
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there was a recall on the 02-03's i think about a fuel line under the manifold being too short. in below 20*F weather, it leaks slowly onto the heads/block until it reaches operating temps. i just bought the $62 kit to do myself. i dont know if the 04-06's are affected. may wanna look into that. it happens to me every winter when the temps are cold.
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Old 02-14-2012, 11:33 AM   #6
Travisty
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This has been happening to my buddies 04 as of late on cold mornings too, so he took it to the dealership and they couldn't find anything wrong. I'm buying a 04 soon, I hope that this isn't a normal thing for us cold-climate folk, or that SOA releases another service bulletin for these cars too.

Sorry I don't have any real insight to add to this thread. =/
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Old 02-14-2012, 12:19 PM   #7
Big-E
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I haven't done anything yet to locate and/or tighten any of the fuel-line clamps.

I'm hoping that if I don't have to work too late this Saturday that I can try to take a look at things and perhaps take some photos. We'll see.
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Old 08-17-2014, 11:33 AM   #8
Big-E
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I went through the entire year of 2012 w/o checking or tightening the fuel-line hose-clamps and had no problems.

Winter of 2012 to 2013 I had only two instances of a gas smell, and that was on the coldest of days during winter, down in the teens.

July 2013 I removed the intake manifold to install the MAW composite TGV Deletes (now owned by, and produced by, ZeroLift) and during the process, I replaced the rubber fuel-hoses. From July 2013 through approximately April 2014, there were no instances of a gas smell.

Starting around April / May 2014 as the ambient temperature started to climb, there was no problem. But when the temperature started to hit say 60-degrees and then drop by several degrees overnight, I would then have a gas smell upon start-up in the morning. I did check the passenger side hose-clamps. I tightened the hose clamps for the hose leading to the fuel-injector rail by removing the air-intake snorkel, and checking the ones underneath by removing the turbo air-inlet tube (that was fun!), but those did not need tightening. I was able to access one of the clamps on the driver's side and it was tight as well.

This has continued until the temperature started to level off at above approximately 76-degrees. If the temperature went above this, but dropped down to approximately 76-degrees, there was no gas smell.

But now as the temperature has begun to slowly drop overall, and drop-down overnight, the smell is there and is more prevalent. This happens after the car has been sitting for a while, usually overnight or after work.

Out of curiosity, I decided to check the bolts holding each composite TGV delete to each head and apparently they were not 'tight' possibly due to expansion and contraction? These bolts only require 5.5. Lb/ft to be tightened. I did check the bolts holding the intake manifold to the TGV delete and they were fine.

After effectively tightening these bolts, the smell has been dramatically cut-back, but it's still there.

I'm considering removing the intake manifold and TGV deletes to replace the hoses and use new double-pinch clamps as well as to check the fuel-injector seals and the TGV delete seals.

*******

Morning, Monday, August 18, 2014

The ambient temperature was approximately 63-degrees. The gas smell is still there, and persisted much longer than it has. Meaning, after a few minutes, the smell would usually dissipate. This morning, even after warm-up, and driving for 10-minutes, the smell was still there. Before embarking on my drive to work, I opened the hood and it appears that the smell is coming from under the manifold, or the fuel lines & hoses - this was using the old 'nose test'.

*******

Evening, Monday, August 18, 2014

Checked and torqued the composite TGV deletes to heads: 7.00 Nm (approximately 5.2 Lb/ft)

*******

Morning, Tuesday, August 19, 2014

Ambient temperature approximately 60-degrees. Checked and torqued the composite TGV deletes to heads: 7.00 Nm (approximately 5.2 Lb/ft). Started car and still have fuel-smell, to which I am leaning toward the fuel-hoses/clamps.

I would like to check the fuel pressure to rule-out a bad fuel pressure regulator, but do not have access to a fuel pressure gauge set.

Also noted a lot of gray smoke - it's running rich and this has been happening lately.

Drove to work and the idle would rise and drop when coming to a full-stop. This persisted and became a bit more prevalent on my 12-mile trip to work (mostly highway). Get into parking garage and the idle is getting worse and the CEL came on.

Will have to check CEL among others and figure out this next step in the evolution of my current and continuing problems.

*******

Afternoon, Tuesday, August 19, 2014

I apparently collapsed the composite TGV delete on the driver's side and thus the reason for the CEL (P0071 running lean) and the continued gasoline smell. I have a suspicion however that the composite TGV delete was originally contributing to this issue, regardless of the fact that one, if not both, have been damaged.

The intake manifold is coming off and I have decided to go with an aluminum TGV delete (core-exchange) from Grimm Speed. The coolant will be drained tonight and I will remove as much as I can in preparation for the intake manifold w/TGV removal.

Oh well, live and learn.

*******

Wednesday, August 20, 2014

The composite TGV deletes are damaged and are going to be replaced with OEM units from GrimmSpeed.

The fuel-hoses themselves were intact and there did not appear to be any visible signs of leaking fuel. The hose clamps were also tested and are tight.

When this is reinstalled, new hoses and pinch-clamps will be installed, as will new OEM gaskets and a set of phenolic spacers.

I will follow-up with the results.

Last edited by Big-E; 08-22-2014 at 01:00 PM.
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Old 08-18-2014, 01:01 AM   #9
j_subie597
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Default Gas smell, 2006 WRX

I'm in the same boat as you Big-E I'm getting a fuel smell in my 05 sti it's pretty random when it happens, mostly when I'm 3/4 full or higher for gas. I also replaced the rubber hoses too. I'm probably just going to have to live with it unless it gets worse. I wish you luck and let me know if you find a permanent fix.
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