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Sulfur Smell from Toyota 4Runner

862 messages,  Last post on Aug 20, 2009 at 3:48 PM

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What is this discussion about? Toyota 4Runner, Engine, Exhaust, Fuel System, SUV

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#737 of 862 Stinky exhaust health hazard? by corancher Oct 14, 2004 (8:44 am)
Well, maybe not. I won't consume bandwidth by recapping all the previous discussions here, but would encourage anybody who cares to read extensively in this discussion.   In summary, today's engines burn so clean that the old carbon monoxide problem (due to incomplete combustion) doesn't usually exist. It's a stink nuisance and would probably be improved if Toyota went back to the side-firing exhaust they used to use. Stink is probably coming from the rear cabin exhausts, so you can often avoid the stink by simply leaving the system on fresh (rather than recirculate) and having the fan on at least the low setting.   If the stink is a problem, get the TSB(s) and keep leaning on your dealer and, by all means, complain to Toyota too. This kind of thing shouldn't be happening, but it's not unique to the 4Runner or to Toyota.
#738 of 862 And close your rear window!!! by driftracer Oct 14, 2004 (8:57 am)
#739 of 862 Re: [Mr_Shiftright] by lear02 Oct 14, 2004 (12:00 pm)
Replying to: Mr_Shiftright (Oct 14, 2004 8:36 am) The sulfur smell tells you that there is exhaust fumes entering the car.The exhaust is carbon monoxide . No matter how you look at it exhaust does not belong inside the car. And changing from one make of fuel to another is not the answer. Replies to this message: biyo (Oct 15, 2004 6:59 pm)
#740 of 862 by Mr_Shiftright HOST Oct 15, 2004 (12:54 pm)
All true but I don't see how you could have any appreciable amount of carbon monoxide in your truck. What I'm driving at here is that this claim substantially diminishes your credibility in an arbitration, since if you were breathing carbon monoxide in any harmful array you would be very sick indeed. We all breath a bit of CO every day of our lives unless we are really living in the woods or something.   So I am suggesting you drop that one and stick to the obnoxious odor as being very annoying rather than life-threatening. Replies to this message: lear02 (Oct 15, 2004 2:51 pm)
#741 of 862 Re: [Mr_Shiftright] by lear02 Oct 15, 2004 (2:51 pm)
Replying to: Mr_Shiftright (Oct 15, 2004 12:54 pm) Suggestion well taken.I know that you know the obnoxious odor is from the exhaust system. If the CO content is 1% and 99% other gases thats still an extremely unhealthy environment to be driving in every day. Toyota knows it has a problem. They do not know how to come to terms with it. Maybe do to cost? This may become a class action suit time will tell. We all have big money invested in our cars and we deserve the best ride we can get.The one thing to remember here is the exhaust is getting in side the vehicle.
#742 of 862 I've been involved by driftracer Oct 15, 2004 (3:44 pm)
in class-action evaluation on this, and after testing, we determined that there's no more noxious emissions in a new 4Runner than in several other vehicles tested. Comparitively, when tested by itself (4 vehicles), they were 70-80% less in cabin emissions, driving by themselves on deserted roads, than just driving the vehicle in normal traffic.   If you can't tell, I'm NOT a "sky is falling, let's sue everybody" advocate. We have become a country of victims and plaintiffs instead of men, women, and consumers.
#743 of 862 Re: [lear02] by biyo Oct 15, 2004 (6:59 pm)
Replying to: lear02 (Oct 14, 2004 12:00 pm) I've sendeng e-mails to Toyota Motor Co. copy to the director of my dealer, Toyota Motor Company said that TSB is not funded yet, and told me to contact the Customer Relation Manager of the dealer, I spoke with CRM and told me that they have to diagnose the vehicle but I doubt that even they will running for 2 hours, maybe they can't duplicate the problem due to the odor is not there all the time. Also I receive an e-mail from Dealer Service Director that asking me to make an appoinment and tell about the TSB and let him know once my car at the dealer. I will keep posted what ever the result.
#744 of 862 Re: Purchased Borla System [neumie2000] by biyo Oct 15, 2004 (7:02 pm)
Replying to: neumie2000 (Aug 23, 2004 9:24 am) I'm sure that changing fuel brand is not the answer. Replies to this message: neumie2000 (Dec 06, 2004 6:02 am)
#745 of 862 2003 4Runner Sulphur Smell by bgs Oct 15, 2004 (9:55 pm)
I am going to arbitration with Toyota Oct. 21, 2004. Does anyone have any suggestions? I have put up with this bad smell for about 12 months. I had the TSB performed, but the smell continues. The problem was not fixed. I live in southern California and have tried every kind of gasoline. Nothing works, the vehicle smells everyday. Is there anything to help me in arbitration? Please HELP!!! I cannot take this smell anymore!!!   How can Toyota blame this problem on gasoline? I have driven 5 different vehicles at work in the last year, and not one of those vehicles has a bad smell problem. Toyota says other manufactures are having the same issues. I would like to know who. Every friend and relative hate to get in our car. They don't have this problem.   What can I use to HELP my situation? Am I just fighting a losing battle? Replies to this message: rkinkead (Oct 16, 2004 12:39 am) driftracer (Oct 16, 2004 6:07 am)
#746 of 862 Re: 2003 4Runner Sulphur Smell [bgs] by rkinkead Oct 16, 2004 (12:39 am)
Replying to: bgs (Oct 15, 2004 9:55 pm) I am in Florida. I did the TSB about two months ago. The smell cleared up, and I have not had any problems as yet. Incidentally, they reprogrammed the ECU, then I had to wait a week for the new CAT. During that time, the smell changed from "rotten eggs" to faint "lit match". After the CAT change, it went to normal (disappeared).   Someone pointed out that the cabin vent is under the right side of the rear bumper, next to the exhaust. (true. I checked it out). That is why the smell is so intense. A co-worker of mine has a '03 Accord that smells of sulfur whenever he guns it with the windows open. The emission is common in many cars. Volvos from the '80s were plagued this smell. The problem is that the 4runner has a bad vent location.   Also, in driving without the fix for about 18 months, I found that recirculate kept the smell down. I was never one for driving with open windows, so it never bothered me.   The Toyota manual has a warning against running the engine in idle for more than 20 minutes (as in slow traffic). I hope that is not because they are aware of the risk of exhaust coming in through the cabin vent. CO is still produced even with the best CAT. I could see it building up to lethal levels in a cabin. But that is still possible if one has recirculate off while sitting in traffic behind any car.   Lastly, I have been checking to see if my fuel inefficiency has changed. (by calculating at fill ups) It appears to remain the same.

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