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Old 07-28-2013, 02:13 PM   #1
tillroot1
 
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Drives: 2010 Camaro SS
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JUST CANT FIND THE MISSFIRE!

I have posted here before on the tuning forums, I have a 2010 SS with the 6manual, and the 6.2 I have a full ARH exhaust including cats. a CAI and a Dyno tune from JDP Motorsports. some time back I would notice a slight misfire, and it seemed to be at between 1k and 2k rpms while surface street driving. It has steadily gotten worse, the dealership can only show a random misfire, and does not set off any lights on the dash. I have changed the plugs, wires and cleaned the mass airflow sensor. Has anybody else had this problem and been able to track the issue down? the car runs perfectly except this low rpm issue and it does it at a steady speed in any town driving. While the car idles with the parking brake applied, every once in a while I can see the tach dip and pick up but not at a consistant rate, unsure if it may be related but just a symptom. Thanks, Ron Tilley
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Old 07-28-2013, 02:22 PM   #2
The Stig
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Vacuum leak?
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Old 07-28-2013, 02:44 PM   #3
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I had the same problem before. And it turns out to be the injectors as I guess. Because when I changed the injectors to ID850 the problem is gone. You may try some injectors cleaner additive.
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Old 08-01-2013, 10:03 PM   #4
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tri gun, can you tell me more about the injectors? I have tried the techron chevron cleaner, and just about out of ideas, Thanks, Ron
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Old 08-02-2013, 10:38 AM   #5
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have you tried driving the car with the scanner in the car and set to read the misfire moniter, if anything else it will show what cylinder is mis firing. After that you can zero in on the cause, a random misfire can be really tough to locate without live feed from the moniter.
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Old 08-02-2013, 06:31 PM   #6
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Quote:
Originally Posted by firestone_ss View Post
have you tried driving the car with the scanner in the car and set to read the misfire moniter, if anything else it will show what cylinder is mis firing. After that you can zero in on the cause, a random misfire can be really tough to locate without live feed from the moniter.

would the dealership do that? they are the ones that told me that there was a random misfire. Its very irritating and I do not know what to do. Thanks, Ron Tilley
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Old 08-03-2013, 02:55 PM   #7
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We are in the same boat on this one, just cant track it down. Luckily everything is fine and the light goes away, P0300 code, once I get above 2K. If I track it down I will be sure to let you know what I found.
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Old 08-03-2013, 11:59 PM   #8
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Quote:
Originally Posted by tillroot1 View Post
would the dealership do that? they are the ones that told me that there was a random misfire. Its very irritating and I do not know what to do. Thanks, Ron Tilley
its up to the tech and every tech does his/her diagnostic procedure differently,if you can by-pass the service advisor and talk to the tech who looked at it im sure you will get a better picture of whats going on, the techs name should be on your receipt, have faith good luck
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