jeeper2269

I have a 15' is350 f sport with the takeda intake and it smells really bad when I mash the gas.

Anyone have this happen?

what causes it?

cremaster

iTrader: (1)

like rotten eggs? it's the cats clearing themselves out from the carbon build up, i believe. hence, mash the gas more often.

jeeper2269

yep.. thank you.

gbgary

Rotten Eggs

The smell of rotten eggs is due to a compound called hydrogen sulfide. This comes from the small amount of sulfur that is present in the fuel. Normally the sulfur is converted to sulfur dioxide, which has no odor. When the converter breaks or the filtering layers have worn down inside the converter, the sulfur is not transformed into the odorless form. Therefore a strong rotten egg smell is produced. Another possible cause for this smell may be that the converter is plugged. Unfortunately you cannot repair a converter but need to have it completely replaced. Two other causes of rotten eggs besides a broken catalytic converter include an engine that is running too hot or a broken fuel pressure regulator. You can easily deal with the fuel pressure regulator by replacing the fuel filter.

car-exhaust-smell-understanding-where-the-problem-lies

arentz07

Wow, what a coincidence. I don't drive my car near redline often, but I decided to be a hooligan tonight and ran around a bit. I noticed an odd smell maybe 30 seconds after accelerating - was going to chalk it up to something outside, but I doubt it was a coincidence. Would this happen on a car with as low as 3700 miles?

gmancash

not sure but I changed my oil using Penzoil Ultra plus Technology and it stopped the smell. Also it made my car perform way smoother and responsive . They claim it's 99.5% pure oil compared to the purity of others which is around 70-85%

gmancash

not sure but I changed my oil using Penzoil Ultra plus Technology and it stopped the smell. Also it made my car perform way smoother and responsive . They claim it's 99.5% pure oil compared to the purity of other oils which is around 70-85%

Solara350

Every 4cyl Engine older model cars smells like that whenever they tries to show off in front of my IS350 on Freeway/highway, this is a false answer to the smell that whenever you go WOT floored the gas, broken Cat converter in some States if under 70k miles dealer will replace it under warranty BY LAW, Cat Converter does not break down like that. I have Broken Cat Converter on my Toyota Solara code P0420 and Code P0171, System too lean and Cat+Exhaust system, before no smell only whenever i go WOT, now smell all the time even car in PARK but it comes and goes when driving. What i'm trying to tell is if Cat Converter goes bad the smell will be there all the time.

The person up there was right, IT'S THE CARBON BURNS UP FROM THE ENGINE, If you know about Italian Tune for German cars.

Solara350

Yep oil does help with that too, expensive brand Synthetic oil like Mobil 1 , Amsoil, Castrol, Penzoil, i've been using Mobil 1 Synthetic only for almost 20 years. I know a lot of guys driving Luxury cars but change cheap engine oil like 20$ per 5 litres in mechanic shop and whenever their car break down they go blame to the car maker, i remember the Volkswagon and Audi 2009 model stated under the Hood "Use 10w-30 Mobil 1 Synthetic oil only" .

manchild

Dude just go to an empty area without people and traffic and run the car hard like a drunken baboon. Redline it and drive it hard. Check the oil first and have fun. Sometimes a good cars likes to be rode hard and put away wet.

jeeper2269

My buddy says do have lexus replace the cat bow that it's under warranty.

I should have an appointment by the 28th.


I will post updates. It's getting worse though.

Sasnuke

Do let us know what happens...I'm curious if Lexus will replace the cats...
Out of curiosity, what type/grade of fuel do you use? There is a possibility Lexus will also ask and recommend you change fuel stations/grade first.

PAPI007

If this is the case with your car having so few miles then this will debunk the OP theory about the smell!

pnoygil

that smell means your car is running rich when you floor the gas. Toyota made it this way to protect the engine.

goldengame

If it's really bad (like mine was) and you've tried different brands of gas, you may be able to get the cat replaced under warranty. Ever since I got a new cat, I haven't smelled the rotten egg smell under hard acceleration.