What is wrong with my car? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

3Black · 03-23-2015, 09:32 AM

Lately my car has been smelling like gas/rotten eggs, then it started overheating and the backfires have been a lot louder (see video). I'm going to the dealer tomorrow for the overheating part, they say it might be a bad thermostat but I was wondering if there is anything else I should be worried about. Currently not tuned with high flow cats and throwing codes P015d, P0420, and P0430 which I expected with the cats. https://youtu.be/IJ9tdKL2ATQ

gajagfan · 03-23-2015, 10:21 AM

I am not able to look into those codes, but I associate the rotten egg smell with cat problems...a sulfur type smell.

PalmerGA · 03-23-2015, 10:33 AM

Quote:

Originally Posted by gajagfan

I am not able to look into those codes, but I associate the rotten egg smell with cat problems...a sulfur type smell.

Agreed. That sulfur smell is most likely cat related. The backfiring could be several things but it certainly isn't "normal". Could be a timing issue, a fuel/air mixture issue, a tuning issue, etc. Better have them check that out too.

13blackLS · 03-23-2015, 10:34 AM

Codes seem to be cat and o2 sensor related

3Black · 03-23-2015, 10:39 AM

Quote:

Originally Posted by PalmerGA

Agreed. That sulfur smell is most likely cat related. The backfiring could be several things but it certainly isn't "normal". Could be a timing issue, a fuel/air mixture issue, a tuning issue, etc. Better have them check that out too.

Wouldn't the backfiring make sense with P015d?

PalmerGA · 03-23-2015, 10:47 AM

Quote:

Originally Posted by 3Black

Wouldn't the backfiring make sense with P015d?

Sorry... I don't know the code translations. I was just commenting based on previous issues with backfiring.

Spec · 03-23-2015, 10:49 AM

Did you add extensions to your HFC's? These will help prevent any codes from popping. Might also want to check for exhaust leaks.

On the below pic, you'll note the extensions I purchased and installed for mine. You're going to get that smell with new cats on... not sure about the backfiring, though... this could be fuel/air mixture related. Definitely recommend a tune after installing HFC's, catback, headers etc.

BrutalSS · 03-23-2015, 10:59 AM

p015d is a 02 delayed response code

maddoggyusa · 03-23-2015, 11:19 AM

you realize they can void your warranty with high flow cats right? also it's a federal law violation to replace stock cats that are working properly. and now you want the dealer to fix this problem?

And best, their response will likely be replace the OEM cats and see if that fixes your problems.

It's possible it's running lean with the high flow cats... causing it to overheat... burn up cats... and who knows what.

If you don't have any other mods, I think you just need to tune it... which will likely fix most of your problems.

BrutalSS · 03-23-2015, 11:30 AM

I have a tune with my long tubes with hi flows and I have no code issues, the only issue I ever had was that I needed the tolerances for my 02 sensors changed as they were too tight and it kept throwing codes. I believe the code was that the 02 sensors were out of range.

jshaf · 03-23-2015, 12:34 PM

well if they void the warranty just gut those things and tune out the sensor, but who knows what they will do at the dealership, hope the dealer is mod friendly

3Black · 03-23-2015, 04:32 PM

Quote:

Originally Posted by maddoggyusa

you realize they can void your warranty with high flow cats right? also it's a federal law violation to replace stock cats that are working properly. and now you want the dealer to fix this problem?

And best, their response will likely be replace the OEM cats and see if that fixes your problems.

It's possible it's running lean with the high flow cats... causing it to overheat... burn up cats... and who knows what.

If you don't have any other mods, I think you just need to tune it... which will likely fix most of your problems.

False, high flow cats do not void your powertrain warranty. You can have a fully tuned out Camaro and still not have your warranty voided because the dealer has to prove your modifications caused your problem.

ChrisBlair · 03-23-2015, 04:49 PM

Quote:

Originally Posted by gajagfan

I am not able to look into those codes, but I associate the rotten egg smell with cat problems...a sulfur type smell.

Especially a long dead cat. Yes, it will keep evil spirits and most people away, but boy does it smell bad.

Reineke · 03-23-2015, 05:46 PM

Maybe your old neighbor is having the last laugh...

03-23-2015, 09:32 AM	#1
3Black Account Suspended Drives: 2014 1SS/RS M6 Join Date: Feb 2014 Location: California Posts: 365	What is wrong with my car? Lately my car has been smelling like gas/rotten eggs, then it started overheating and the backfires have been a lot louder (see video). I'm going to the dealer tomorrow for the overheating part, they say it might be a bad thermostat but I was wondering if there is anything else I should be worried about. Currently not tuned with high flow cats and throwing codes P015d, P0420, and P0430 which I expected with the cats. https://youtu.be/IJ9tdKL2ATQ

03-23-2015, 10:49 AM	#7
Spec Account Suspended Drives: 2010 Camaro 1SS LS3 Join Date: Jan 2015 Location: Riverside, CA Posts: 4,018	Did you add extensions to your HFC's? These will help prevent any codes from popping. Might also want to check for exhaust leaks. On the below pic, you'll note the extensions I purchased and installed for mine. You're going to get that smell with new cats on... not sure about the backfiring, though... this could be fuel/air mixture related. Definitely recommend a tune after installing HFC's, catback, headers etc. Attached Images

03-23-2015, 12:34 PM	#11
jshaf Montani Semper Liberi Drives: 2011 Black 2SS/RS w/ IOM stripes Join Date: Feb 2010 Location: Masontown, WV Posts: 4,841	well if they void the warranty just gut those things and tune out the sensor, but who knows what they will do at the dealership, hope the dealer is mod friendly __________________ Stainless Works 1 7/8 Long Tude Headers, Stainless Works High Flow Cats, Stainless Works Retro Chambered Catback, Z/28 Air Intake, RDP Tuned, FR41 Chrome Rims, 1100W stereo, 35% Tint

03-23-2015, 10:21 AM	#2
gajagfan Drives: 2013 1SS 1LE Black - Std Exhaust Join Date: Mar 2013 Location: Brunswick, GA Posts: 3,622 View My Garage	I am not able to look into those codes, but I associate the rotten egg smell with cat problems...a sulfur type smell.

03-23-2015, 10:34 AM	#4
13blackLS Drives: 2013 camaro ls; 2005 rx8 Join Date: Mar 2013 Location: Houston Posts: 577	Codes seem to be cat and o2 sensor related

03-23-2015, 10:59 AM	#8
BrutalSS Drives: 2010 Hennessey Camaro Join Date: Feb 2015 Location: NY Posts: 242 View My Garage	p015d is a 02 delayed response code

03-23-2015, 11:19 AM	#9
maddoggyusa Drives: 2013 Camaro Dusk 2SS/6 Join Date: Sep 2013 Location: New Jersey Posts: 1,586	you realize they can void your warranty with high flow cats right? also it's a federal law violation to replace stock cats that are working properly. and now you want the dealer to fix this problem? And best, their response will likely be replace the OEM cats and see if that fixes your problems. It's possible it's running lean with the high flow cats... causing it to overheat... burn up cats... and who knows what. If you don't have any other mods, I think you just need to tune it... which will likely fix most of your problems.

03-23-2015, 11:30 AM	#10
BrutalSS Drives: 2010 Hennessey Camaro Join Date: Feb 2015 Location: NY Posts: 242 View My Garage	I have a tune with my long tubes with hi flows and I have no code issues, the only issue I ever had was that I needed the tolerances for my 02 sensors changed as they were too tight and it kept throwing codes. I believe the code was that the 02 sensors were out of range.

03-23-2015, 05:46 PM	#14
Reineke Drives: 2010 SW Camaro 2SS RS 6M Join Date: Aug 2012 Location: Van Alstyne, TX Posts: 97	Maybe your old neighbor is having the last laugh...