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Old 11-22-2012, 08:31 PM   #1
Medi0cr3
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Running Lean and.....

2011 2SS M6
Nightfury cam
Borla LT headers
Borla ATAK exhaust
jannetty tuned

P0171 - Quite often
P0131 - Sometimes
P0300 - Rare

Swaped O2 sensors, still present
Replaced #1 bank O2 sensor for grins
Replaced spark plugs with another set of stock, did not overtorque
Replaced plug wires
Did a continuity check for breaks, still thinking the ohm reading should not be above 1.00 ohms (true/false?)
Reloaded the tune
Replaced both header gaskets with GM stock ones for grins...

Short term fuel trims are maxed out on my #1 bank and only reset when I WOT @ 4k rpm.

Fuel trims stay maxed and this is killing my gas mileage.

I'm at a loss and no clue what else to look for...

Vacuum leak doesn't seem to exist. There aren't many vacuum lines on these LS3's

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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
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Old 11-23-2012, 08:04 AM   #2
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Try data logging and have the tune checked
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Old 11-23-2012, 10:37 AM   #3
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If the fuel trims are positive, I wouldn't think swapping injectors from side to side would help but might be worth a try?
Wiring all the way to the O2 sensor is good and not pinched somewhere?
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Old 11-23-2012, 11:01 AM   #4
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A friend asked me to try swapping injectors, i havne't done it yet.

As far as I can tell with the ohm check the wiring is good, in my expierence if an ohm check is over 1.00 ohms then there's an issue. The ECU is also supplying 12v to the end of the wireharness for the O2 sensor connector, so I know its getting power. Not sure if there are more electrical checks on that harness that can be done or not.
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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
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Old 11-24-2012, 12:58 AM   #5
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Need some suggestions folks, I'm out of ideas =[
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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
Tuned by Rhino79


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Old 11-24-2012, 07:38 AM   #6
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Did this happen right after installing cam, headers etc, or some time later?
A little history might help.

Also, your signature shows Jannetty tune. Did they tune for this cam?
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Last edited by Southern Comfort; 11-24-2012 at 09:46 AM.
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Old 11-24-2012, 08:13 AM   #7
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It sure sounds like the tune to me but if you have any leaks before or near the S1 02's, it will add unneeded fuel in closed loop. Not knowing how it is tuned, we can only guess.

Contact the tuner and shoot him a log.
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Old 11-24-2012, 06:58 PM   #8
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I've replaced the header exhaust gasket on bank 1. I reseated the bolts to the header last night before I went to the track. Problem is still there.

Yes ted, did my tune and I've contacted him. But there isn't a whole lot anybody can do without looking at the car.
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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
Tuned by Rhino79


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Old 11-25-2012, 11:16 AM   #9
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More history would be nice.
When exactly did this problem start? Was it after adding any mods? Was the car running fine prior to the problem with the same mods?

Has their been a drastic change in the weather (much colder)?

Why is their nothing that can be done (tune wise) to adjust for the problem?
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Old 11-25-2012, 12:54 PM   #10
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I noticed a leaning condition a month or so after we installed the headers. Ted turned off the cat sensors. When I got the lean condition I checked the header gaskets and found that both the borla gaskets were garbage and replaced with stock and the problem went away. A week or so later it started coming on almost at every start. The weather was pretty hot.

Ted says the tune is fine.
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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
Tuned by Rhino79


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Old 11-25-2012, 01:08 PM   #11
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If the tune is fine, I would check for vacuum leaks then, run the car at idle and spray carb cleaner around the intake manifold (mist it around), any vaccum lines around the intake manifold, spray around the brake booster line, catch can if you have one. If the idle of the car raises up you're heading in the right direction. If there are no changes I would really look into the tune of the vehicle
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Old 11-25-2012, 01:57 PM   #12
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I don't see how it could be tune related if it's only 1 bank. It has to be mechanical.
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Old 11-25-2012, 03:07 PM   #13
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There was a similar post recently where a car had an issue with one bank 1,3,5,7 that particular side was not running correctly it wound up being the tune, but I would run down the basics with chasing vacuum leaks first though. According to the OP the car does have a cam shown in the sig. Someone would really have to look at the car

http://www.camaro5.com/forums/showthread.php?t=254910
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Old 11-25-2012, 03:30 PM   #14
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The OP is getting specific codes and this isn't the same situation as the problems from that thread. Not the same thing.
I doubt there is anything that Ted would have done when he did the tune for this car that would cause this problem, especially since it's been intermittent and mechanical in nature previously.
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Old 11-25-2012, 05:25 PM   #15
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I'm starting to lean towards the ECU. It is still under factory warranty and I'm considering taking it to the dealership. I've cancelled the extended warranty.

I've tried everything it seems like. I really dont think its a vacuum leak.
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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
Tuned by Rhino79


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Old 11-26-2012, 06:01 AM   #16
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Let us know how you make out
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Old 11-26-2012, 02:29 PM   #17
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I doubt you have any warranty with the cam, ect. Let us know.
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Old 11-26-2012, 04:11 PM   #18
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Quote:
Originally Posted by Medi0cr3 View Post
2011 2SS M6
Nightfury cam
Borla LT headers
Borla ATAK exhaust
jannetty tuned

P0171 - Quite often
P0131 - Sometimes
P0300 - Rare

Swaped O2 sensors, still present
Replaced #1 bank O2 sensor for grins
Replaced spark plugs with another set of stock, did not overtorque
Replaced plug wires
Did a continuity check for breaks, still thinking the ohm reading should not be above 1.00 ohms (true/false?)
Reloaded the tune
Replaced both header gaskets with GM stock ones for grins...

Short term fuel trims are maxed out on my #1 bank and only reset when I WOT @ 4k rpm.

Fuel trims stay maxed and this is killing my gas mileage.

I'm at a loss and no clue what else to look for...

Vacuum leak doesn't seem to exist. There aren't many vacuum lines on these LS3's

What is your Name?

Everything is on Bank 1

A misfire shows up as a LEAN condition and is not a tuning issue.

Bent valves, broken or weak valve springs, cracked spark plug, bad wires or connections, bad coil vacuum leak all can cause a misfire random or otherwise which will set the codes you have listed.

Log your misfire data to pinpoint the cylinder that is misfiring.

Send me Logs to look at and I will try and help you, but you must be my eyes and ears on the Car itself.

Ted.
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Old 11-26-2012, 04:29 PM   #19
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Just for kicks.Switch your coils from bank 1 to bank 2.It would eliminate a possible coil issue.Easy and free.
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Old 11-27-2012, 07:58 AM   #20
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Ted, What PIDs exactly do you need?

Motion427, I swapped #1 and #3 for grins, but didn't switch between banks.
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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
Tuned by Rhino79


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Old 11-27-2012, 10:41 AM   #21
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Double check the connectors at the injectors.
You can even remove 1 plug at a time to test it.If engine change sounds,you know that the injector is working,if not,you would have an issue with that cylinder.Can also use a 194 bulb and hook it at the connector to see if theirs fire at the injector connector itself (engine running).
Could be the intake gasket that is leaking.Can also remove the valve cover to see if theirs no broken valve spring and see if the valvetrain is working correctly.
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Old 11-27-2012, 10:56 AM   #22
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Quote:
Originally Posted by Medi0cr3 View Post
Ted, What PIDs exactly do you need?

Motion427, I swapped #1 and #3 for grins, but didn't switch between banks.
misfire current cyl #,s 1-8

1 and 3 are on the same bank. drivers side 1357 pass side 2468
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Old 12-06-2012, 10:47 PM   #23
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i would check all the grounds and make sure there are no burt wires or loose connections. look at the injector connections also to make sure there are no bent pins.
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Old 12-27-2012, 09:50 PM   #24
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running excessively lean can cause a misfire.
or a po300 aka random misfire.

if its lean enough it can go from being a random to a 301 302 303 04 05 06 07 08 based on what cylinder the crank sensor is seeing as a reoccurring misfire.

low voltage at a o2 sensor can indicate a lean condition.

generally speaking anytime a vehicle has misfire their is excessive oxygen present.
odds are it will throw a lean code along with misfire codes.
sometimes itll throw a o2 code in there too to screw with you.

so where the hell do you begin?
we need more data op.

not to mention all the aftermarket parts here dont help.

fwiw trims will rest during wot because of entering openloop.
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Old 01-02-2013, 08:14 PM   #25
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I'm currently deployed overseas and dont have direct access to my car. However, if anybody has any grand ideas I can have my friend take a look.

Things that need to be looked at are the wiring to grounds and trying the carb cleaner spray around intake and vacuum areas.

Thanks tho for takin a look at the thread. I'm lookin' at doing a motor swap in October. However, before I get anywhere near that, this issue needs to be addressed prior to. The car runs great at the track (6800 DA) due to WOT resetting fuel trims and running off the tune.
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Night Fury Cam
Borla LT Headers and Borla Cat Back ATAK
9in. diff with 4.11's, DSS Axles, and Alum Shaft
Hurst Short-Shifter; Ideal Garage Master Cylinder
H-E Street Slayer Twin Billet Clutch
BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings.
Strange Rear Coilovers and mounts
Tuned by Rhino79


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