2LT misfire - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

mcapple · 05-04-2012, 05:18 PM

I have a 2011 2LT camaro. It's been the 8th or 9th time it got misfire. The car has no aftermarket parts. Error code is P0301 every time. The dealership changed all spark plugs(they are rich fouled, I think it's not normal considering the car only done 16000km) and injector(looks clean) in cylinder 1. I call GM Canada for help. They ask me to go to the dealership again.

Condition when misfire occur: I am in 6th gear, 100km/h, 2000rpm, as soon as I take my foot off the throttle, car still in 6th gear, misfire happen.

I ask the technician if he see a lot deposit on the intake vale. He said is fairly clean.

I'm not sure what they can do to fix it. Any suggestions? Go to a different dealership? They run the same test anyway.

I guess they should change the ECU? maybe the engine?

kjkjr27 · 05-04-2012, 05:23 PM

The only time I got a miss fire was after i took my car out of storage and was running on the gas that I had stored(that had stabil in it) I ended up putting in dry gas and have yet to have it happen again.

JCO2185 · 05-05-2012, 06:56 PM

im having misfire codes as well.

bmorecam · 05-05-2012, 07:00 PM

you guys need a reflash. I talk to my service manager and he gave me the whole run down. there's nothing wrong with your car, but of course unless its something else you guys diagnosed that's causing the misfire. Its a simple glitch in the ecu that affect some bosch e69 from 2008 to 2011. There's a TSB for this problem.

mcapple · 05-05-2012, 11:25 PM

Quote:

Originally Posted by bmorecam

you guys need a reflash. I talk to my service manager and he gave me the whole run down. there's nothing wrong with your car, but of course unless its something else you guys diagnosed that's causing the misfire. Its a simple glitch in the ecu that affect some bosch e69 from 2008 to 2011. There's a TSB for this problem.

Thanks. I'll let the service manager know this. Is there a name for the TSB? The dealership asked help from GM and opened a TEC case for the problem. But GM says they never have this kind of problem before, I guess they don't know about the TSB.

PieNsky · 05-05-2012, 11:31 PM

I only had a misfire once. It was on a dyno up in Cincy.

SC2150 · 05-06-2012, 11:45 AM

That and the oil ingestion causes the plugs to foul easier.

mcapple · 05-07-2012, 10:53 AM

Quote:

Originally Posted by bmorecam

you guys need a reflash. I talk to my service manager and he gave me the whole run down. there's nothing wrong with your car, but of course unless its something else you guys diagnosed that's causing the misfire. Its a simple glitch in the ecu that affect some bosch e69 from 2008 to 2011. There's a TSB for this problem.

I told the dealership about reflashing computer. They said that they need to follow the instruction from GM since GM is paying the cost. And they can't not guarantee when it can be fixed. Is there anything I can do to push GM reflashing the ECU?

mcapple · 05-08-2012, 04:44 PM

The dealership says they will change the serpentine belt

ChadG · 05-08-2012, 06:46 PM

What the heck does the serpentine belt have to do with misfires? Sounds like you need to find a new service department if you ask me.

nyrfan · 05-08-2012, 07:19 PM

Quote:

Originally Posted by ChadG

What the heck does the serpentine belt have to do with misfires? Sounds like you need to find a new service department if you ask me.

Dealer knows best

formare · 05-08-2012, 09:27 PM

Maybe your missing the faa-lan-gee. Those things are really important.

hapisok · 05-09-2012, 05:40 AM

have you tried swapping your coils around to see if the misfire changes cylinders?

mcapple · 05-10-2012, 12:50 AM

Quote:

Originally Posted by hapisok

have you tried swapping your coils around to see if the misfire changes cylinders?

yes, switched cylinder 1 and 6 coils, cylinder 1 still has the p0301 code

05-04-2012, 05:18 PM	#1
mcapple Drives: 2011 Camaro 2LT Join Date: May 2012 Location: Edmonton AB Canada Posts: 53	2LT misfire I have a 2011 2LT camaro. It's been the 8th or 9th time it got misfire. The car has no aftermarket parts. Error code is P0301 every time. The dealership changed all spark plugs(they are rich fouled, I think it's not normal considering the car only done 16000km) and injector(looks clean) in cylinder 1. I call GM Canada for help. They ask me to go to the dealership again. Condition when misfire occur: I am in 6th gear, 100km/h, 2000rpm, as soon as I take my foot off the throttle, car still in 6th gear, misfire happen. I ask the technician if he see a lot deposit on the intake vale. He said is fairly clean. I'm not sure what they can do to fix it. Any suggestions? Go to a different dealership? They run the same test anyway. I guess they should change the ECU? maybe the engine?

05-04-2012, 05:23 PM	#2
kjkjr27 COTW 9/16/13 Drives: 2011 2LT/RS Camaro IOM Join Date: Jan 2012 Location: Syracuse Posts: 10,089	The only time I got a miss fire was after i took my car out of storage and was running on the gas that I had stored(that had stabil in it) I ended up putting in dry gas and have yet to have it happen again. __________________ Twitch Youtube

05-05-2012, 06:56 PM	#3
JCO2185 RIDING ON AIR Drives: 2010 2LT/RS Summit White Join Date: Dec 2009 Location: Long Island NY Posts: 964	im having misfire codes as well. __________________ --John--2010 Camaro 2LT/RS, Summit White Air Ride Suspension, BBK Longtube Headers, Hi-Flo cats, Doug Thorley catback exhaust, Elite Catch-Can, Airraid CAI, Trifecta tune, ZL1 front end with Phantom grille, ZL1 side skirts, MRR228 graphite wheels

05-08-2012, 09:27 PM	#12
formare The Milano Drives: 2017 Firefly ShipWorks Join Date: Jun 2010 Location: Chicagoland (Crown Point, IN) Posts: 1,877 View My Garage	Maybe your missing the faa-lan-gee. Those things are really important. __________________ My first Love. She was called "Miss Carriage" (still cry when I think about her) 383, Muncie 4 speed, custom linkage mated to hurst short throw shifter.

05-09-2012, 05:40 AM	#13
hapisok crazier than a coconut Drives: 2010 2SS/RS LS3 Join Date: Jul 2010 Location: virginia Posts: 1,547	have you tried swapping your coils around to see if the misfire changes cylinders? __________________

05-05-2012, 07:00 PM	#4
bmorecam Account Suspended Drives: jealous vendors mad!! HAHA!! Join Date: Jan 2011 Location: CYBERGMONSTER@GMAIL.COM Posts: 3,658 View My Garage	you guys need a reflash. I talk to my service manager and he gave me the whole run down. there's nothing wrong with your car, but of course unless its something else you guys diagnosed that's causing the misfire. Its a simple glitch in the ecu that affect some bosch e69 from 2008 to 2011. There's a TSB for this problem.

05-05-2012, 11:31 PM	#6
PieNsky Drives: Victory Red 1LS Join Date: Nov 2008 Location: Louisville,KY Posts: 1,928 View My Garage	I only had a misfire once. It was on a dyno up in Cincy.

05-06-2012, 11:45 AM	#7
SC2150 Account Suspended Drives: 2012 Camaro RS, RX supercharged Join Date: Dec 2009 Location: Bradenton, FL Posts: 6,063	That and the oil ingestion causes the plugs to foul easier.

05-08-2012, 04:44 PM	#9
mcapple Drives: 2011 Camaro 2LT Join Date: May 2012 Location: Edmonton AB Canada Posts: 53	The dealership says they will change the serpentine belt

05-08-2012, 06:46 PM	#10
ChadG Drives: 2010 Black Camaro LS Join Date: Feb 2010 Location: Bay Area, CA Posts: 1,679 View My Garage	What the heck does the serpentine belt have to do with misfires? Sounds like you need to find a new service department if you ask me.