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

 
BrokenTech  (OP)

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01/05/2017 03:51 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
0nmyt0es
 Quoting: The Wild 0nes


You're pretty sharp dude. I enjoyed that. Def not what I expected to find on a conspiracy forum some random night. LOL

Are you a tech? Enthusiast? Student?
 Quoting: Anonymous Coward 73706403


ah im nobody. just a guy who builds 700hp 1.6 ltrs in his garage as a hobby. I'm actually a Welder/fabricator by trade.
 Quoting: The Wild 0nes


waitwhat

LOL
Anonymous Coward
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01/05/2017 03:56 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
:0nmyt0es:
 Quoting: The Wild 0nes


You're pretty sharp dude. I enjoyed that. Def not what I expected to find on a conspiracy forum some random night. LOL

Are you a tech? Enthusiast? Student?
 Quoting: Anonymous Coward 73706403


I was reluctant to even post the question. I even went on a Grand Prix modding forum and the only answers I could get there as well was to just replace the cat or I needed headers because I dropped the SC pulley. Like I said, not a pro, but know bullshit when I hear it.

There are some pretty smart people here if you can wade through all the dumb asses to find them. Need to drain the swamp I suppose.

Thanks for your insight.
 Quoting: BrokenTech


Yeah, I would think a specific GP forum is where you would want to be. That's kinda surprising.

Do as Wild Ones suggests with the O2 sensor readings. Check live voltages with the scan tool too.

Have a physical look at the cats also. Do they look like they got hot? (IE - Do they look "cast iron" grey?) Does one look more discolored than another?

Maybe I missed it, but just how old are the O2 sensors?
The Wild 0nes

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01/05/2017 03:56 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
0nmyt0es
 Quoting: The Wild 0nes


You're pretty sharp dude. I enjoyed that. Def not what I expected to find on a conspiracy forum some random night. LOL

Are you a tech? Enthusiast? Student?
 Quoting: Anonymous Coward 73706403


ah im nobody. just a guy who builds 700hp 1.6 ltrs in his garage as a hobby. I'm actually a Welder/fabricator by trade.
 Quoting: The Wild 0nes


waitwhat

LOL
 Quoting: BrokenTech


D16z6 is an amazing little motor.
Thats why i love hondas.
get you a k20 (2.0 ltr) and with the right money and knowledge and you can break 1000hp...

in a 4 cyl.
The first step is to establish that something is possible; then probability will occur.


It's easy to stand in the crowd but it takes courage to stand alone

Do i look really like a guy with a plan? you know what i am? I'm a dog chasing cars. I wouldn't know what to do with one if i ever caught it. You know, I.. I just do things. The mobs have plans. The cops have plans. They're Schemers. Schemer's trying to control their little worlds.

I'm Not a Schemer.
BrokenTech  (OP)

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01/05/2017 04:13 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
0nmyt0es
 Quoting: The Wild 0nes


You're pretty sharp dude. I enjoyed that. Def not what I expected to find on a conspiracy forum some random night. LOL

Are you a tech? Enthusiast? Student?
 Quoting: Anonymous Coward 73706403


I was reluctant to even post the question. I even went on a Grand Prix modding forum and the only answers I could get there as well was to just replace the cat or I needed headers because I dropped the SC pulley. Like I said, not a pro, but know bullshit when I hear it.

There are some pretty smart people here if you can wade through all the dumb asses to find them. Need to drain the swamp I suppose.

Thanks for your insight.
 Quoting: BrokenTech


Yeah, I would think a specific GP forum is where you would want to be. That's kinda surprising.

Do as Wild Ones suggests with the O2 sensor readings. Check live voltages with the scan tool too.

Have a physical look at the cats also. Do they look like they got hot? (IE - Do they look "cast iron" grey?) Does one look more discolored than another?

Maybe I missed it, but just how old are the O2 sensors?
 Quoting: Anonymous Coward 73706403


I will check the o2 voltages as well.

It only has one cat, visual check added to the to do list.

O2 sensors are still the stock ones.

This car has been pretty much trouble free, other than a fuel pump, fuel filter and the parts I mentioned earlier have ever been replaced. The tranny also went out when it was still in warranty.

Three axles on the passenger side, and five axles on the driver side, but I am to blame there and all happened after the mods. The axles have lifetime warranties, easy to change and would rather break the axles than the tranny any day.

It has been garage kept which I feel has also led to it being a relatively trouble free car along with the normal routine maintenance.
Anonymous Coward
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01/05/2017 04:26 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
...


You're pretty sharp dude. I enjoyed that. Def not what I expected to find on a conspiracy forum some random night. LOL

Are you a tech? Enthusiast? Student?
 Quoting: Anonymous Coward 73706403


I was reluctant to even post the question. I even went on a Grand Prix modding forum and the only answers I could get there as well was to just replace the cat or I needed headers because I dropped the SC pulley. Like I said, not a pro, but know bullshit when I hear it.

There are some pretty smart people here if you can wade through all the dumb asses to find them. Need to drain the swamp I suppose.

Thanks for your insight.
 Quoting: BrokenTech


Yeah, I would think a specific GP forum is where you would want to be. That's kinda surprising.

Do as Wild Ones suggests with the O2 sensor readings. Check live voltages with the scan tool too.

Have a physical look at the cats also. Do they look like they got hot? (IE - Do they look "cast iron" grey?) Does one look more discolored than another?

Maybe I missed it, but just how old are the O2 sensors?
 Quoting: Anonymous Coward 73706403


I will check the o2 voltages as well.

It only has one cat, visual check added to the to do list.

O2 sensors are still the stock ones.

 Quoting: BrokenTech


Wow. Didn't you say this car was an 01? If so, those O2 sensors are 16 years old and have seen lots of abuse. (Higher Heat / High Performance Mods)

How many miles?
BrokenTech  (OP)

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01/05/2017 04:37 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
...


I was reluctant to even post the question. I even went on a Grand Prix modding forum and the only answers I could get there as well was to just replace the cat or I needed headers because I dropped the SC pulley. Like I said, not a pro, but know bullshit when I hear it.

There are some pretty smart people here if you can wade through all the dumb asses to find them. Need to drain the swamp I suppose.

Thanks for your insight.
 Quoting: BrokenTech


Yeah, I would think a specific GP forum is where you would want to be. That's kinda surprising.

Do as Wild Ones suggests with the O2 sensor readings. Check live voltages with the scan tool too.

Have a physical look at the cats also. Do they look like they got hot? (IE - Do they look "cast iron" grey?) Does one look more discolored than another?

Maybe I missed it, but just how old are the O2 sensors?
 Quoting: Anonymous Coward 73706403


I will check the o2 voltages as well.

It only has one cat, visual check added to the to do list.

O2 sensors are still the stock ones.

 Quoting: BrokenTech


Wow. Didn't you say this car was an 01? If so, those O2 sensors are 16 years old and have seen lots of abuse. (Higher Heat / High Performance Mods)

How many miles?
 Quoting: Anonymous Coward 73706403


Yes, 01 with 112k miles.

But the mods were not done until the car was out of warranty, so around '06-'07. I know that does not change the age of the O2 sensors though.

I have not had any real issues until this. Up until recently I saw no reason to change something that was still working. As far as I knew anyways and have not really had the thought to arbitrarily check the O2 sensors since the computer never alerted me. Don't fix what isn't broken is my motto.
Anonymous Coward
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01/05/2017 04:40 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
...


I was reluctant to even post the question. I even went on a Grand Prix modding forum and the only answers I could get there as well was to just replace the cat or I needed headers because I dropped the SC pulley. Like I said, not a pro, but know bullshit when I hear it.

There are some pretty smart people here if you can wade through all the dumb asses to find them. Need to drain the swamp I suppose.

Thanks for your insight.
 Quoting: BrokenTech


Yeah, I would think a specific GP forum is where you would want to be. That's kinda surprising.

Do as Wild Ones suggests with the O2 sensor readings. Check live voltages with the scan tool too.

Have a physical look at the cats also. Do they look like they got hot? (IE - Do they look "cast iron" grey?) Does one look more discolored than another?

Maybe I missed it, but just how old are the O2 sensors?
 Quoting: Anonymous Coward 73706403


I will check the o2 voltages as well.

It only has one cat, visual check added to the to do list.

O2 sensors are still the stock ones.

 Quoting: BrokenTech


Wow. Didn't you say this car was an 01? If so, those O2 sensors are 16 years old and have seen lots of abuse. (Higher Heat / High Performance Mods)

How many miles?
 Quoting: Anonymous Coward 73706403


Just went through the thread. Yup 2001. You need to replace those Oxygen sensors. At the very least the pre-cat sensor.

These sensors are in a very harsh environment and are considered "consumables". They get sluggish and unable to produce the correct voltage as they age. This fools the PCM into thinking that the exhaust gas is LEAN, when in fact, it's actually RICH. Even without seeing the car, I can almost assure you that these old O2 sensors are most likely the cause of your problem. You just have to hope they didn't cook the cat yet.

Get AC Delco or similar quality replacements,
Anonymous Coward
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01/05/2017 04:44 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
...


Yeah, I would think a specific GP forum is where you would want to be. That's kinda surprising.

Do as Wild Ones suggests with the O2 sensor readings. Check live voltages with the scan tool too.

Have a physical look at the cats also. Do they look like they got hot? (IE - Do they look "cast iron" grey?) Does one look more discolored than another?

Maybe I missed it, but just how old are the O2 sensors?
 Quoting: Anonymous Coward 73706403


I will check the o2 voltages as well.

It only has one cat, visual check added to the to do list.

O2 sensors are still the stock ones.

 Quoting: BrokenTech


Wow. Didn't you say this car was an 01? If so, those O2 sensors are 16 years old and have seen lots of abuse. (Higher Heat / High Performance Mods)

How many miles?
 Quoting: Anonymous Coward 73706403


Yes, 01 with 112k miles.

But the mods were not done until the car was out of warranty, so around '06-'07. I know that does not change the age of the O2 sensors though.

I have not had any real issues until this. Up until recently I saw no reason to change something that was still working. As far as I knew anyways and have not really had the thought to arbitrarily check the O2 sensors since the computer never alerted me. Don't fix what isn't broken is my motto.
 Quoting: BrokenTech


The service life of an O2 sensor is 60 to 80,000 miles. Less if subjected to extreme conditions. I have seen many, many cars that had sluggish and under-performing O2 sensors that never once threw an O2 code.

Time for some new O2 sensors.

Gotta go. Let us know how that went. I'm sure that you're going to notice a difference, though.
BrokenTech  (OP)

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01/05/2017 04:50 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
...


I will check the o2 voltages as well.

It only has one cat, visual check added to the to do list.

O2 sensors are still the stock ones.

 Quoting: BrokenTech


Wow. Didn't you say this car was an 01? If so, those O2 sensors are 16 years old and have seen lots of abuse. (Higher Heat / High Performance Mods)

How many miles?
 Quoting: Anonymous Coward 73706403


Yes, 01 with 112k miles.

But the mods were not done until the car was out of warranty, so around '06-'07. I know that does not change the age of the O2 sensors though.

I have not had any real issues until this. Up until recently I saw no reason to change something that was still working. As far as I knew anyways and have not really had the thought to arbitrarily check the O2 sensors since the computer never alerted me. Don't fix what isn't broken is my motto.
 Quoting: BrokenTech


The service life of an O2 sensor is 60 to 80,000 miles. Less if subjected to extreme conditions. I have seen many, many cars that had sluggish and under-performing O2 sensors that never once threw an O2 code.

Time for some new O2 sensors.

Gotta go. Let us know how that went. I'm sure that you're going to notice a difference, though.
 Quoting: Anonymous Coward 73706403


Alright. Thanks.
Anonymous Coward
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01/05/2017 05:23 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Is this the biggest conspiracy of all time or what??

Seriously tho, why is this thread even on glp?
Anonymous Coward
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01/05/2017 05:37 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
your battery is over charging - the alternator / voltage regulator took a shit. I guarantee it.
Anonymous Coward
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01/05/2017 05:39 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Hey guys!! hi

Lookit me! I built this badboy myself!

It's got a 12 cam 64 valve knuckleduster motor from a 1934 cropsprayer, and 56inch wheels that I salvaged from my sister's pram. It fucks off...

bike KRAKOOM!

^^^ (actual photo of bike)
huhnowwhat10180
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01/05/2017 06:04 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Supposed to wash your face after giving guys rim jobs
Anonymous Coward
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01/05/2017 06:17 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Cat converter is correct.
 Quoting: anonymous 71647481


Yes cat converter is issue ,, all other replies are retards either they don't know shit about cars or they trying to mess with u ,, cut the car converter out and put in a piece of pipe ,, fuck the environment your car will run better
Wire
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01/05/2017 12:24 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
A cat would not be plugged. Engine would not run. I still say it's your fuel you are buying. The computer should pick up any bad readings.

Like Ox sensor.
Anonymous Coward
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01/05/2017 02:38 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
could be a capacitor going bad
 Quoting: Anonymous Coward 21283683


rotten egg smell can also be a capacitor leaking

check your electronics

a 15y old car is bound to have failing capacitors
its easy to spot a capacitor leak or a bulged cap top
a simple visual inspection of the board will tell you

the only thing you have to do is to get your ecu out, open it and inspect... simple and that's one more thing you can cross off the list...
Anonymous Coward
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01/05/2017 03:03 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Had the same problem and it was CLOGGED UP CAT, so get it checked out. You can use an infrared thermometer to see if the cat is getting too hot. Check you tube for videos on testing the cat.
BRIEF

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01/05/2017 03:19 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


Correct, the smell is from the engine dumping too much fuel into the exhaust and the converter is reburning it and causing the smell. Fix the over fueling and the smell will go away...when a converter fails it's the symptom of an engine problem, not the cause.
I never forgive and I never forget

I am a licensed firearm holder. I will, under protection of law, use lethal force if attacked.

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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Had the same problem and it was CLOGGED UP CAT, so get it checked out. You can use an infrared thermometer to see if the cat is getting too hot. Check you tube for videos on testing the cat.
 Quoting: Anonymous Coward 73308492


What killed the cat?
I never forgive and I never forget

I am a licensed firearm holder. I will, under protection of law, use lethal force if attacked.

Briefcut4892
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Cat converter is correct.
 Quoting: anonymous 71647481


Yes cat converter is issue ,, all other replies are retards either they don't know shit about cars or they trying to mess with u ,, cut the car converter out and put in a piece of pipe ,, fuck the environment your car will run better
 Quoting: Anonymous Coward 73724563


That's like a doc giving pills for symptoms and not fixing the cause.
I never forgive and I never forget

I am a licensed firearm holder. I will, under protection of law, use lethal force if attacked.

Briefcut4892
Wire
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01/06/2017 12:57 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
You never know what kills a cat.

The cars I WORKED ON didn't have cat pellets they were a honey comb solid core cats. They either broke up and plugged the muffler and closed off the exhaust.

Sense he won't tell what fuel brand he been running I would by some CHEVRON TECHRON to wash the intake valves from carbon build up. There is a difference in gasoline.

Run SHELL as they use nitrogen and I don't know what good that does.
Anonymous Coward
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01/06/2017 01:14 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
deepwater horizon part 2 coming up!
Anonymous Coward
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01/06/2017 02:37 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
catalytic converter...... my vote

The smell is waining off and on because it is in the process of going bad, pretty soon the smell will happen all the time.
Start saving change now, a new one isn't cheap.
Wire
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01/07/2017 03:02 AM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
My 89 Buick 3.8 would not pass Kalifornia SMOG because of cheap gas misfires. So I started running Standard oil gas.

Ran Standard oil gas the cheap regulator fuel 87. Ran that gas and it SMOG two weeks later.
BrokenTech  (OP)

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05/08/2017 09:06 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I am revisiting this post.
Its been about 5 months since the OP. Life got in the way and kept me from giving my attention to this vehicle. So, I parked it and drove another so as to not exacerbate the problem and potentially ruining the catalytic.

About two months ago, I was able to spend some time on it and as it was suggested I replaced the O2 sensors. Two sensors, one pre-cat and one post-cat, Bosch OE equivalent. I have now driven the car long enough to establish a new baseline after replacing the O2 sensors.

Replacing the sensors has made a big big difference along with increasing my gas mileage an additional 30 miles on a tank.

However, I am still getting a slight rotten egg smell, but it is no where as bad as it was, the O2 sensors definitely made a huge improvement(90% better). My question now is, what would be my next step in trying to further eliminate the rotten egg smell?

Due to the mods made to the car, one poster suggested taking it to a tuner shop and have it custom tuned. Should this be where I start? However, before I take it in I would like to eliminate any other possibility, mechanical or otherwise first that could be playing a role in the excess fuel getting to the cat.

TIA

Last Edited by BrokenTech on 05/08/2017 09:42 PM
Anonymous Coward
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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.
 Quoting: Anonymous Coward 73706403


I met a lot of tech's like you over the years.

Think you know it all and feel special because you took some tests.

Usually people like you are wrong, about just about everything.
Anonymous Coward
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05/08/2017 09:15 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
Blinker fluid going bad, or past its expiration date. Refill blinker fluid with fresh fluid and note the expiration date.
Anonymous Coward
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05/08/2017 09:17 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I'm going to take a not so wild guess here...

Shell Gasoline - Your car stinks rotten, the absolute worst on that shit. Shell is that Saudi crap that is very high in sulfur.

My dad told me never to buy from them 25 years ago. He always noticed his cars ran like shit after he filled up there. He's one of those guys who has a really keen feel for strange vibrations, strange noises nobody else can hear, that kind of thing. When he tells you to use a certain oil or a certain gas or a type of grease, whatever, I always listen.
BrokenTech  (OP)

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05/08/2017 09:32 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
I'm going to take a not so wild guess here...

Shell Gasoline - Your car stinks rotten, the absolute worst on that shit. Shell is that Saudi crap that is very high in sulfur.

My dad told me never to buy from them 25 years ago. He always noticed his cars ran like shit after he filled up there. He's one of those guys who has a really keen feel for strange vibrations, strange noises nobody else can hear, that kind of thing. When he tells you to use a certain oil or a certain gas or a type of grease, whatever, I always listen.
 Quoting: Anonymous Coward 47430760


Using a certain fuel and running like shit is one thing. Excess fuel hitting the cat is another. Simply stated either the injectors are going bad/leaky or something is telling the injectors to spray more fuel than what can be burned and the excess fuel is hitting the cat causing the rotten egg smell. I learned that in chemistry class 30 some years ago. Platinum and sulfur creates a rotten smell.

Last Edited by BrokenTech on 05/08/2017 10:45 PM
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05/08/2017 10:45 PM
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Re: Question for the Auto Mechanics, Rotten Egg Smell *REVISITED* Pg 5
sounds like a funny smell coming from the drivers rear





GLP