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Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5

 
Anonymous Coward
User ID: 73303797
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01/04/2017 05:12 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
How bout quit beating the shit of your car.
 Quoting: Anonymous Coward 46766195


See my post above and this makes sense. Heat her up and burn the shit out. Run her hard and it will stop.
BrokenTech  (OP)

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01/04/2017 05:13 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am giving my honest experience as a 20+ year mechanic. Typically, the only times I smell what you are describing is when I drive a car hard that has not been driven hard. I can test drive cars the same way every time but some will smell sulphury and some not. Same models, same manufacturers.

I think it's more the catalyst needs cleaned out and I am heating it up more than the customer would during their routine driving. Does this sound possible under your circumstances?
 Quoting: Anonymous Coward 73303797


Good answer!! Now that you mention it, yes. Like I stated in another post, this engine is supercharged and may be part of the reason.

Like you mentioned needing to be opened up a little more. Just put-putting around town seems to be when it is the worst. I have noticed that if I get out on the highway and open it up to 70+ mph for 40 or so miles, it seems to make a difference with the smell.
Anonymous Coward
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01/04/2017 05:13 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
STOP BEATING THE SHIT OUT OF YOUR WHEN IT HSNT EVEN WARMED UP YET JESUS CHRIST.
Anonymous Coward
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01/04/2017 05:13 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Are we supposed to take your word for it that it's a rotten egg smell? Assuming there is a strong odor, it might be that you've picked the wrong odoriferous description....

Thanks for being vague as fack!
BrokenTech  (OP)

User ID: 51566510
United States
01/04/2017 05:25 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am giving my honest experience as a 20+ year mechanic. Typically, the only times I smell what you are describing is when I drive a car hard that has not been driven hard. I can test drive cars the same way every time but some will smell sulphury and some not. Same models, same manufacturers.

I think it's more the catalyst needs cleaned out and I am heating it up more than the customer would during their routine driving. Does this sound possible under your circumstances?
 Quoting: Anonymous Coward 73303797


Good answer!! Now that you mention it, yes. Like I stated in another post, this engine is supercharged and may be part of the reason.

Like you mentioned needing to be opened up a little more. Just put-putting around town seems to be when it is the worst. I have noticed that if I get out on the highway and open it up to 70+ mph for 40 or so miles, it seems to make a difference with the smell.
 Quoting: BrokenTech


Since you have given the most logical answer, I will reveal the vehicle specifics. Its a '01 Grand Prix GTP, not stock.

-I have replaced the supercharger pulley with a smaller one.
-Took the breather off and replaced with a K&N air filter that is not enclosed it gets all the air it wants.
-Performance wires
-Performance exhaust, cat back.
-Computer has been adjusted for the mods.

I cant remember for sure, but as I recall I did not have this problem until after I made the mods.

I tend to baby it around town. Except when some millennial pulls up next to me in their piece of shit rice burner thinking they are tough shit. They typically do not have anything for me, except when I break an axle in the process.

Last Edited by BrokenTech on 01/04/2017 05:30 PM
Terrebonne

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01/04/2017 06:34 PM

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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am not a mechanic but I have had this problem before....

Your catalytic converter is prob going bad
 Quoting: Manosteel


I second that!

Is My Catalytic Converter Bad?


Rotten Egg Smell. If you're regularly getting wafts of rotten egg smell in and around your car.

[link to autorepair.about.com]



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INFJ; We are the protectors; One Percent of the population.

We put a lot of energy into identifying the best system for getting things done, and constantly define and re-define the priorities.

We know things intuitively, without being able to pinpoint why, and without detailed knowledge of the subject at hand. We are usually right, and we usually know it.

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Anonymous Coward
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01/04/2017 06:48 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am not a mechanic but I have had this problem before....

Your catalytic converter is prob going bad
 Quoting: Manosteel


I second that!

Is My Catalytic Converter Bad?


Rotten Egg Smell. If you're regularly getting wafts of rotten egg smell in and around your car.

[link to autorepair.about.com]



.
 Quoting: Terrebonne


Lol you three need to stop, stick to what you really know how to do.
Anonymous Coward
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01/04/2017 06:50 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am giving my honest experience as a 20+ year mechanic. Typically, the only times I smell what you are describing is when I drive a car hard that has not been driven hard. I can test drive cars the same way every time but some will smell sulphury and some not. Same models, same manufacturers.

I think it's more the catalyst needs cleaned out and I am heating it up more than the customer would during their routine driving. Does this sound possible under your circumstances?
 Quoting: Anonymous Coward 73303797


Good answer!! Now that you mention it, yes. Like I stated in another post, this engine is supercharged and may be part of the reason.

Like you mentioned needing to be opened up a little more. Just put-putting around town seems to be when it is the worst. I have noticed that if I get out on the highway and open it up to 70+ mph for 40 or so miles, it seems to make a difference with the smell.
 Quoting: BrokenTech


Since you have given the most logical answer, I will reveal the vehicle specifics. Its a '01 Grand Prix GTP, not stock.

-I have replaced the supercharger pulley with a smaller one.
-Took the breather off and replaced with a K&N air filter that is not enclosed it gets all the air it wants.
-Performance wires
-Performance exhaust, cat back.
-Computer has been adjusted for the mods.

I cant remember for sure, but as I recall I did not have this problem until after I made the mods.

I tend to baby it around town. Except when some millennial pulls up next to me in their piece of shit rice burner thinking they are tough shit. They typically do not have anything for me, except when I break an axle in the process.
 Quoting: BrokenTech


My 05 wrx sti will eat your car up mister, stock and all.
BrokenTech  (OP)

User ID: 51566510
United States
01/04/2017 06:54 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am giving my honest experience as a 20+ year mechanic. Typically, the only times I smell what you are describing is when I drive a car hard that has not been driven hard. I can test drive cars the same way every time but some will smell sulphury and some not. Same models, same manufacturers.

I think it's more the catalyst needs cleaned out and I am heating it up more than the customer would during their routine driving. Does this sound possible under your circumstances?
 Quoting: Anonymous Coward 73303797


Good answer!! Now that you mention it, yes. Like I stated in another post, this engine is supercharged and may be part of the reason.

Like you mentioned needing to be opened up a little more. Just put-putting around town seems to be when it is the worst. I have noticed that if I get out on the highway and open it up to 70+ mph for 40 or so miles, it seems to make a difference with the smell.
 Quoting: BrokenTech


Since you have given the most logical answer, I will reveal the vehicle specifics. Its a '01 Grand Prix GTP, not stock.

-I have replaced the supercharger pulley with a smaller one.
-Took the breather off and replaced with a K&N air filter that is not enclosed it gets all the air it wants.
-Performance wires
-Performance exhaust, cat back.
-Computer has been adjusted for the mods.

I cant remember for sure, but as I recall I did not have this problem until after I made the mods.

I tend to baby it around town. Except when some millennial pulls up next to me in their piece of shit rice burner thinking they are tough shit. They typically do not have anything for me, except when I break an axle in the process.
 Quoting: BrokenTech


My 05 wrx sti will eat your car up mister, stock and all.
 Quoting: Anonymous Coward 73636004


Good for you. ;) My intention was not to beat every car out there, just a certain few.
Anonymous Coward
User ID: 73547500
United States
01/04/2017 07:16 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am fairly mechanically inclined, I do all the maintenance and repairs on my cars. I have encountered an issue that has perplexed me and was looking for more insight.

I am getting a rotten egg smell. As I have always understood it, the rotten egg smell is the result of the sulfur in the fuel contacting the platinum in the catalytic converter.

I am going to withhold a few vehicle specifics, for now, because I have been getting some automatic generic responses that the catalytic is bad and needs to be replaced. I do not buy that, however, if this continues I believe on a long enough time line it will eventually ruin the catalytic. In this case if I were to replace the catalytic, I do not feel the problem would be resolved and would still continue.

I will say that if I change who I buy the fuel from it seems to stop temporarily. It seems to resolve it for 3-4 tanks of gas then it returns. I have three different places that I cycle through buying gas from.

What could be some other things that could cause this to happen? I will say that I am forced to use premium fuel.

Sorry for the lack of vehicle information and vagueness, this is just how my bullshit detectors work.
 Quoting: BrokenTech



head gasket starting or already went
BrokenTech  (OP)

User ID: 51566510
United States
01/04/2017 07:35 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am fairly mechanically inclined, I do all the maintenance and repairs on my cars. I have encountered an issue that has perplexed me and was looking for more insight.

I am getting a rotten egg smell. As I have always understood it, the rotten egg smell is the result of the sulfur in the fuel contacting the platinum in the catalytic converter.

I am going to withhold a few vehicle specifics, for now, because I have been getting some automatic generic responses that the catalytic is bad and needs to be replaced. I do not buy that, however, if this continues I believe on a long enough time line it will eventually ruin the catalytic. In this case if I were to replace the catalytic, I do not feel the problem would be resolved and would still continue.

I will say that if I change who I buy the fuel from it seems to stop temporarily. It seems to resolve it for 3-4 tanks of gas then it returns. I have three different places that I cycle through buying gas from.

What could be some other things that could cause this to happen? I will say that I am forced to use premium fuel.

Sorry for the lack of vehicle information and vagueness, this is just how my bullshit detectors work.
 Quoting: BrokenTech



head gasket starting or already went
 Quoting: Anonymous Coward 73547500


No, not the case.
Anonymous Coward
User ID: 73534867
United States
01/04/2017 07:46 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
It is the cat converter, but the reason for the improper action by the cat converter is the wrong spark plugs. Those multi-ground electrode plugs look cool but the spark CURRENT (the heat producer) is divided among the arcs. Simple Ohm's law stuff. The spark is not hot enough. Make sure you use the exact MFR recommended spark plug. Not sexy just right.
BrokenTech  (OP)

User ID: 51566510
United States
01/04/2017 08:21 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
It is the cat converter, but the reason for the improper action by the cat converter is the wrong spark plugs. Those multi-ground electrode plugs look cool but the spark CURRENT (the heat producer) is divided among the arcs. Simple Ohm's law stuff. The spark is not hot enough. Make sure you use the exact MFR recommended spark plug. Not sexy just right.
 Quoting: Anonymous Coward 73534867


Are you assuming what type of plugs I have installed?
Anonymous Coward
User ID: 72267068
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01/04/2017 08:27 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
P0420 code?
BrokenTech  (OP)

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01/04/2017 08:31 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
P0420 code?
 Quoting: Anonymous Coward 72267068


No codes.
Anonymous Coward
User ID: 73706403
United States
01/04/2017 08:36 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am giving my honest experience as a 20+ year mechanic. Typically, the only times I smell what you are describing is when I drive a car hard that has not been driven hard. I can test drive cars the same way every time but some will smell sulphury and some not. Same models, same manufacturers.

I think it's more the catalyst needs cleaned out and I am heating it up more than the customer would during their routine driving. Does this sound possible under your circumstances?
 Quoting: Anonymous Coward 73303797


You're not a very good mechanic...
BrokenTech  (OP)

User ID: 51566510
United States
01/04/2017 08:40 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am giving my honest experience as a 20+ year mechanic. Typically, the only times I smell what you are describing is when I drive a car hard that has not been driven hard. I can test drive cars the same way every time but some will smell sulphury and some not. Same models, same manufacturers.

I think it's more the catalyst needs cleaned out and I am heating it up more than the customer would during their routine driving. Does this sound possible under your circumstances?
 Quoting: Anonymous Coward 73303797


You're not a very good mechanic...
 Quoting: Anonymous Coward 73706403


And your qualifications are what?

Actually, what he said and the way I normally drive the car has some relevance.
Anonymous Coward
User ID: 22338860
United States
01/04/2017 08:50 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Battery
 Quoting: Anonymous Coward 73674557


Battery is fine.
 Quoting: BrokenTech


If the regulator shorts and puts full voltage to the field windings in the alternator, the battery will seriously overcharge and put out the sulphur smell. It will also kill the battery if allowed to continue.

Otherwise it's the catalyst, and various adjustments to the engine can usually clean that up.
Anonymous Coward
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01/04/2017 08:52 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
P0420 code?
 Quoting: Anonymous Coward 72267068


No codes.
 Quoting: BrokenTech


Hmm.. If it was me I'd clean the throttle body and the Mass air flow sensor. Then I'd go to the nearest raceway/dragstrip/small airport and get a few or more gallons of 110 octane and drive her hard a few times after she warmed up. That should clean her up quite a bit.

My old lady drives so tame in her Jag that I have to give her car some race gas and drive it aggressively every few months to keep it running in tip top.
Anonymous Coward
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United States
01/04/2017 08:53 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
STOP FARTING WHILE DRIVING!
Anonymous Coward
User ID: 73706403
United States
01/04/2017 08:55 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am giving my honest experience as a 20+ year mechanic. Typically, the only times I smell what you are describing is when I drive a car hard that has not been driven hard. I can test drive cars the same way every time but some will smell sulphury and some not. Same models, same manufacturers.

I think it's more the catalyst needs cleaned out and I am heating it up more than the customer would during their routine driving. Does this sound possible under your circumstances?
 Quoting: Anonymous Coward 73303797


You're not a very good mechanic...
 Quoting: Anonymous Coward 73706403


And your qualifications are what?

Actually, what he said and the way I normally drive the car has some relevance.
 Quoting: BrokenTech


Not much. ASE Master Tech since 1982, Advanced level L1 and L2 since inception, OMC, MerCruiser, Mercury Marine, Yamaha, Johnson / Evinrude Master Tech, 5 years as pro racing crew member - IMSA / Grand American Series (1990's)

You know - just the basics in car maintenance.
BrokenTech  (OP)

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United States
01/04/2017 09:00 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
P0420 code?
 Quoting: Anonymous Coward 72267068


No codes.
 Quoting: BrokenTech


Hmm.. If it was me I'd clean the throttle body and the Mass air flow sensor. Then I'd go to the nearest raceway/dragstrip/small airport and get a few or more gallons of 110 octane and drive her hard a few times after she warmed up. That should clean her up quite a bit.

My old lady drives so tame in her Jag that I have to give her car some race gas and drive it aggressively every few months to keep it running in tip top.
 Quoting: Anonymous Coward 72267068


I'm thinking it is similar to when carbon builds up and driving the hell out of it cleans it up. I believe driving it the way I usually do and by putting the pedal down more often will help. In 60 degree weather it really seems to be at its peak power and seems to always be wanting more. When I get out on the highway it seems to clear it up for a few weeks.
Anonymous Coward
User ID: 73534867
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01/04/2017 09:11 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
It is the cat converter, but the reason for the improper action by the cat converter is the wrong spark plugs. Those multi-ground electrode plugs look cool but the spark CURRENT (the heat producer) is divided among the arcs. Simple Ohm's law stuff. The spark is not hot enough. Make sure you use the exact MFR recommended spark plug. Not sexy just right.
 Quoting: Anonymous Coward 73534867


Are you assuming what type of plugs I have installed?
 Quoting: BrokenTech


Just what I've seen as a cause more than once. (brother-in law is ASE with his own business and ex-NASCAR North driver/owner)
Anonymous Coward
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01/04/2017 09:11 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I would put the proper thermostat back in. if this
car is computer controled all the fuel mapping would
be based on the factory engine coolant temp.
It would be easy to try it. I think most newer engines
run 195-205?
Anonymous Coward
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01/04/2017 09:18 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am fairly mechanically inclined, I do all the maintenance and repairs on my cars. I have encountered an issue that has perplexed me and was looking for more insight.

I am getting a rotten egg smell. As I have always understood it, the rotten egg smell is the result of the sulfur in the fuel contacting the platinum in the catalytic converter.

I am going to withhold a few vehicle specifics, for now, because I have been getting some automatic generic responses that the catalytic is bad and needs to be replaced. I do not buy that, however, if this continues I believe on a long enough time line it will eventually ruin the catalytic. In this case if I were to replace the catalytic, I do not feel the problem would be resolved and would still continue.

I will say that if I change who I buy the fuel from it seems to stop temporarily. It seems to resolve it for 3-4 tanks of gas then it returns. I have three different places that I cycle through buying gas from.

What could be some other things that could cause this to happen? I will say that I am forced to use premium fuel.

Sorry for the lack of vehicle information and vagueness, this is just how my bullshit detectors work.
 Quoting: BrokenTech


Its your catalytic converter
angryonion

User ID: 25118022
United States
01/04/2017 09:26 PM

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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Just deal with the smell or switch to a low sulfur content fuel and an aftermarket cat converter with a higher nickel content in it.
Or you could just do away with the converters all together and say fuck the EPA.
IRCO

User ID: 73336457
United States
01/04/2017 09:28 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
it's your battery.
IRCO
Anonymous Coward
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United Kingdom
01/04/2017 09:28 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
dont buy supermarket fuel
Anonymous Coward
User ID: 70617131
United States
01/04/2017 09:34 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
get an OBDII code reader on it: If the intake or exhaust mixture is "wrong" it will "throw codes" (show up there).
Anonymous Coward
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01/04/2017 09:36 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
O2 sensor.

ECU putting too much fuel into the catalytic converter on default map.





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