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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 12-07-2011, 04:25 PM   #1
Smoky10
 
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Misfire

I drove my car to the gas station last night, on the way home my engine light came on and all of my nanny lights also came on. I was less than a block from the house and the car was still running fine, so I just coasted to the house. Got in the driveway popped the hood and one of my grannetelli wires had popped off the coil. No worries I just plugged it back in and shoot the hood, problem solved. Well get in the car to go to work this after noon and my check engine light is on. I call onstar they say that I'm throwing a misfire code. So I get out make sure that all my plug wires are seated well (they were). All my mods are listed below...I guess my question is will this code go away on it's own or do I have another problem? Car seems to run just fine rev's good, I didn't drive it to work just in case though.
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2010 Camaro SS M6

Mods: 231/236 LSA 112, Vararam intake, VMAX throttle body, OBX longtube headers, TSP underdrive pulley, DSS one piece aluminum driveshaft, hurst short throw shifter, 3.91 gears

1968 C-10 Short Bed. 6.0 with LS3 heads, intake, TSP 229/236 cam, TBSS long tubes, and 4L60e with a 3200 stall 4.10 gears
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Old 12-07-2011, 04:26 PM   #2
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Quote:
Originally Posted by Smoky10 View Post
I drove my car to the gas station last night, on the way home my engine light came on and all of my nanny lights also came on. I was less than a block from the house and the car was still running fine, so I just coasted to the house. Got in the driveway popped the hood and one of my grannetelli wires had popped off the coil. No worries I just plugged it back in and shoot the hood, problem solved. Well get in the car to go to work this after noon and my check engine light is on. I call onstar they say that I'm throwing a misfire code. So I get out make sure that all my plug wires are seated well (they were). All my mods are listed below...I guess my question is will this code go away on it's own or do I have another problem? Car seems to run just fine rev's good, I didn't drive it to work just in case though.
I am no expert, but from I understand the light should go out with so many drive cycles if problem doesn't exist any longer. The code should be stored in memory.
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Old 12-07-2011, 04:30 PM   #3
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I've had the same problem before with the wire popping off, but once I put the wire back on and start the car again the CEL is gone. This time I started the car a few times and it didn't go away. I guess that's why I so concerned.
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2010 Camaro SS M6

Mods: 231/236 LSA 112, Vararam intake, VMAX throttle body, OBX longtube headers, TSP underdrive pulley, DSS one piece aluminum driveshaft, hurst short throw shifter, 3.91 gears

1968 C-10 Short Bed. 6.0 with LS3 heads, intake, TSP 229/236 cam, TBSS long tubes, and 4L60e with a 3200 stall 4.10 gears
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Old 12-07-2011, 04:36 PM   #4
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Is it driving ok?
If not test the resistance of the wires. If one if partly off for long enough the wire can arc and eventually fry itself. Also the code probably didn't register and then clear since you hadn't run the car with the problem fixed yet. Also check the plug connection point on all the wires too; not just at the coil. My guess is the light went on because you did have a problem but hadn't had time to clear. If the wire condition is good, you checked the connections, and it's driving fine don't worry about it.

If it doesn't go away just go to auto zone or advance and have them clear it.
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Old 12-07-2011, 04:40 PM   #5
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Thanks Synner, I will take it to Advanced in the morning, hopefully the light will go out on the way.
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2010 Camaro SS M6

Mods: 231/236 LSA 112, Vararam intake, VMAX throttle body, OBX longtube headers, TSP underdrive pulley, DSS one piece aluminum driveshaft, hurst short throw shifter, 3.91 gears

1968 C-10 Short Bed. 6.0 with LS3 heads, intake, TSP 229/236 cam, TBSS long tubes, and 4L60e with a 3200 stall 4.10 gears
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Old 12-07-2011, 05:05 PM   #6
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Unplug the battery for 10 minutes. You have to probably reset the code. If it comes back, then you have other issues. Misfire would be likely from the unplugged wire.
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Old 12-07-2011, 05:10 PM   #7
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Hey there Dale haven't talked to you in a while. How is your car doing?
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2010 Camaro SS M6

Mods: 231/236 LSA 112, Vararam intake, VMAX throttle body, OBX longtube headers, TSP underdrive pulley, DSS one piece aluminum driveshaft, hurst short throw shifter, 3.91 gears

1968 C-10 Short Bed. 6.0 with LS3 heads, intake, TSP 229/236 cam, TBSS long tubes, and 4L60e with a 3200 stall 4.10 gears
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Old 12-07-2011, 08:23 PM   #8
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Doing very well. Did you find your issue?
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Old 12-07-2011, 10:09 PM   #9
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Still at work...I will be leaving here in a little bit and when I get home I'll unplug the battery for a bit. Hopefully that does the trick...
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2010 Camaro SS M6

Mods: 231/236 LSA 112, Vararam intake, VMAX throttle body, OBX longtube headers, TSP underdrive pulley, DSS one piece aluminum driveshaft, hurst short throw shifter, 3.91 gears

1968 C-10 Short Bed. 6.0 with LS3 heads, intake, TSP 229/236 cam, TBSS long tubes, and 4L60e with a 3200 stall 4.10 gears
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Old 12-08-2011, 12:05 AM   #10
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I had the same issue after having a cam installed. 'random cylinder misfire'. Cam was causing the computer to think there was an issue when in fact none existed.
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Old 12-08-2011, 12:47 AM   #11
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Cool, thanks for all the replies, I drove it just now and the light didn't go off, so I unplugged the battery for 10 minutes and now it's gone. I guess tomorrow I will see if it comes back on.
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2010 Camaro SS M6

Mods: 231/236 LSA 112, Vararam intake, VMAX throttle body, OBX longtube headers, TSP underdrive pulley, DSS one piece aluminum driveshaft, hurst short throw shifter, 3.91 gears

1968 C-10 Short Bed. 6.0 with LS3 heads, intake, TSP 229/236 cam, TBSS long tubes, and 4L60e with a 3200 stall 4.10 gears
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Old 12-08-2011, 05:29 AM   #12
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Unlikely, but worth checking since you're running LTs...

http://www.camaro5.com/forums/showthread.php?t=168380

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Old 12-08-2011, 09:25 AM   #13
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Random misfire codes happens sometimes. Maybe a little bad gass also.
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Old 12-08-2011, 05:02 PM   #14
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When the code sets hard, you have to reset it. I think the OP will have no more issues.
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Old 12-08-2011, 05:27 PM   #15
Cal 20112SS

 
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My headers were burning one of my spark plug wires causing a rough idle. I popped the hood and saw this. I since switched to MSD wires. Problem solved.

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