P0300 - Gone? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

StlRomAniaN · 10-11-2016, 09:20 AM

Quote:

Originally Posted by ChibiBlackSheep

Your LTFTs and STFTs are all within their acceptable ranges, even running a tad on the rich side (which is better than the lean side)

Hopefully your data during cruising stays as clean as that.

I'm still concerned about clogged cats, how long have those cats been on the car? They shouldn't fail that quickly.

I was surprised of the results. I'm going to run the parameters again while at cruising speed tonight hopefully.

Here was one of the catalytic converters prior to me gutting them. I'm not sure if you can tell in the picture, but the inner portion was closer to the camera, while the whole outside perimeter was pushed back by about 2" or so.

ChibiBlackSheep · 10-11-2016, 09:34 AM

Jeez that thing looked trashed. I can't believe it got that bad so fast, how long were they on the car?

StlRomAniaN · 10-11-2016, 09:37 AM

5 years. I was messing around in downtown Chi. I love the echoes. Nonetheless, I felt something pop on the way home. Must've been that cat. You can see the different shades in the second picture, grey and browns. It's from the overheating I'm sure.

Glad to report it's running fine now that the cats are out and that the excess fuel is no longer in the engine.

I'll do the tests at cruise tonight just to confirm everything is fine.

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rgreene1971 · 10-11-2016, 10:04 AM

Following this thread. Have same issues.

StlRomAniaN · 10-11-2016, 10:15 AM

Quote:

Originally Posted by rgreene1971

Following this thread. Have same issues.

Go ahead and check your parameters (above) via a scan tool. This should be the first step.

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Sdvolcom · 11-15-2017, 10:50 PM

I have the exact same issues.
Except I have no cats. When it’s cold, it idles rough and I get CEL and service stabilitrac and all that. After letting everything warm up and get to normal temps, I’ll turn it off then start it back up. Bam everything goes away. If I can get some advice on this it would be greatly appreciated.

ChibiBlackSheep · 11-16-2017, 08:10 AM

Quote:

Originally Posted by Sdvolcom

I have the exact same issues.
Except I have no cats. When it’s cold, it idles rough and I get CEL and service stabilitrac and all that. After letting everything warm up and get to normal temps, I’ll turn it off then start it back up. Bam everything goes away. If I can get some advice on this it would be greatly appreciated.

What tune are you running? If you aren't running a tune, that's your issue, if you are running a tune, are you tuned for the cat delete properly?

frankwjr · 11-16-2017, 08:31 AM

good chance the 02 sensors were damage also especially since you say it runs fine when warm and that's when the 02's come on line...good luck! when I did my upgrades I was able to locate 4 brand new Bosch 02's on ebay for $80...total.

Sdvolcom · 11-16-2017, 02:31 PM

Quote:

Originally Posted by ChibiBlackSheep

What tune are you running? If you aren't running a tune, that's your issue, if you are running a tune, are you tuned for the cat delete properly?

So I did have a tuner with the little pre-loaded tunes depending on the gas you run. Since it started misfiring I put it back to stock, I guess I’ll shop around for some o2’s probably just end up replacing all 4.

ChibiBlackSheep · 11-16-2017, 03:01 PM

Quote:

Originally Posted by Sdvolcom

So I did have a tuner with the little pre-loaded tunes depending on the gas you run. Since it started misfiring I put it back to stock, I guess I’ll shop around for some o2’s probably just end up replacing all 4.

You need the car properly tuned if you deleted the cats. Anything else that you do is just a bandaid. Your oxygen sensors are reading data wrong because they will think the cats aren't working correctly. On startup, the car ignores the oxygen sensor until the car is up to temp, or on some cars (not sure if this v8 does it), but the car will pump extra air into the cats to help warm them up faster for fuel efficiency.

Nasty1970 · 11-27-2017, 02:15 PM

Im having a similar issue, but my car is mostly stock, all I have done is a vararam air cleaner.

2011, 6.2, 62k miles

it has a noticeable miss(not bad), will see if it goes away with plugs and wires, although I'm not optimistic.

it will do the standard stability track flashing on and off , then initially threw the P0307, I pulled the plug on 7, and it looked a little cruddy, but not bad. cleaned it and started back up, and got P0300.

Im going to do plugs and wires, but Im leaning towards bad o2 sensors

Nasty1970 · 12-05-2017, 01:25 PM

replaced battery, it gave me a little crap starting the next day, so I took it in and sure enough bad.

no more stabiltrack messages, but I still have a miss.

10-11-2016, 09:34 AM	#16
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,085	Jeez that thing looked trashed. I can't believe it got that bad so fast, how long were they on the car? __________________ LS3 Crate Engine Swap \| CSP Custom Cam 232/240 .615/.615 113 +3 \| Stainless Power LT Headers \| Z28 Intake \| Borla S-Type Exhaust \| FTI Triple-Disc Billet 3200 Stall 2012 Camaro 2SS/RS \| 1968 Camaro SS \| 2020 Cadillac CT5 Premium Luxury \| 2021 Spark LS

10-11-2016, 09:37 AM	#17
StlRomAniaN Drives: IOM 2010 Camaro 2SS/RS Join Date: Mar 2009 Location: St. Louis Posts: 1,782 View My Garage	5 years. I was messing around in downtown Chi. I love the echoes. Nonetheless, I felt something pop on the way home. Must've been that cat. You can see the different shades in the second picture, grey and browns. It's from the overheating I'm sure. Glad to report it's running fine now that the cats are out and that the excess fuel is no longer in the engine. I'll do the tests at cruise tonight just to confirm everything is fine. Sent from my iPhone using Tapatalk __________________

10-11-2016, 10:04 AM	#18
rgreene1971 Drives: 2010 Camaro SS Join Date: Feb 2014 Location: Detroit, MI Posts: 129 View My Garage	Following this thread. Have same issues. __________________ My 2010 Camaro SS COMP Cams XFI Street/Strip, Lingenfelter LS3 Heads, AHR Long tube headers + X pipe, FAST LSXR 102mm Intake manifold, LMR Cold air intake, Flowmaster 3" stainless steel exhaust, NoWeeds Exhaust cutouts, Platinum Valve spring kit, ZEX NOS system 175hp shot, Eibach Pro-Kit performance lowering springs (1" drop all around), Custom grills, bumper ports, etc....

11-16-2017, 08:31 AM	#22
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,446	good chance the 02 sensors were damage also especially since you say it runs fine when warm and that's when the 02's come on line...good luck! when I did my upgrades I was able to locate 4 brand new Bosch 02's on ebay for $80...total. __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

11-27-2017, 02:15 PM	#25
Nasty1970 Drives: 2011 Red 2SS RS Convertible Join Date: May 2011 Location: Houston TX Posts: 377	Im having a similar issue, but my car is mostly stock, all I have done is a vararam air cleaner. 2011, 6.2, 62k miles it has a noticeable miss(not bad), will see if it goes away with plugs and wires, although I'm not optimistic. it will do the standard stability track flashing on and off , then initially threw the P0307, I pulled the plug on 7, and it looked a little cruddy, but not bad. cleaned it and started back up, and got P0300. Im going to do plugs and wires, but Im leaning towards bad o2 sensors __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1970 Camaro ,2011 Red Convertible 2SS,2008 Saturn Sky,2012 Jeep Wrangler

11-15-2017, 10:50 PM	#20
Sdvolcom Drives: 2010 5th gen camaro 2ss LS3 Join Date: Sep 2015 Location: Southern California Posts: 41	I have the exact same issues. Except I have no cats. When it’s cold, it idles rough and I get CEL and service stabilitrac and all that. After letting everything warm up and get to normal temps, I’ll turn it off then start it back up. Bam everything goes away. If I can get some advice on this it would be greatly appreciated.

12-05-2017, 01:25 PM	#26
Nasty1970 Drives: 2011 Red 2SS RS Convertible Join Date: May 2011 Location: Houston TX Posts: 377	replaced battery, it gave me a little crap starting the next day, so I took it in and sure enough bad. no more stabiltrack messages, but I still have a miss. __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1970 Camaro ,2011 Red Convertible 2SS,2008 Saturn Sky,2012 Jeep Wrangler