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03-19-2015, 11:11 PM
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#1 |
 Drives: 2015 z28 sold Join Date: Dec 2014
Location: As
Posts: 80
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2015 Z28 two days at track..hurt motor?
As title says
Two days at the track..first time I pushed the car a little in a TT class revving to redline and the check lamp comes on..starts flashing..car was dropping one or more cylinders on track. Code po300 and po306 come up for misfire when scanned in the pits. Reset it....went out for a 5/10ths lap and the felt like crap...but no lamp or code. Reset the ECM...unhooked the battery ..and parked the car for the day. Driving home mil came on....it ain't a bad injector or coil..engine internal..ran some testing to confirm this...don't care to get into it further as there are a lot of arm chair mechanics on the web. Moral of the story don't flash your ecm and void your motor warranty with the ls7 Great car I think..just weak motor. Last edited by MARKSTI; 03-21-2015 at 07:41 AM. |
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03-20-2015, 12:26 AM
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#2 |
   
Drives: Rally Yellow Camaro+Avalanche Join Date: Dec 2009
Location: Vancouver
Posts: 1,110
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OUCH!
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03-20-2015, 05:30 PM
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#3 | |
Drives: 2016 Nightfall Gray Metallic SS Join Date: Dec 2013
Location: NC
Posts: 1,011
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Quote:
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 2016 Nightfall Gray Camaro SS |
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03-20-2015, 06:44 PM
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#4 |
Drives: 2021 300 Join Date: Jan 2015
Location: New Jersey
Posts: 968
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 Very sorry about the motor. Some of us older guys try to warn the newbe's just how important that warranty is. again very sorry maybe after a cool head you can look at it and maybe something you can do..
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03-20-2015, 09:19 PM
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#5 | |
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Drives: 2015 z28 sold Join Date: Dec 2014
Location: As
Posts: 80
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Quote:
Before I tracked the car I spoke to the service manager of the dealership...he advised me not to flash the car since this would void the warranty if we had motor problems as some of the ls7s do. |
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03-20-2015, 09:25 PM
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#6 |
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Drives: 2016 Nightfall Gray Metallic SS Join Date: Dec 2013
Location: NC
Posts: 1,011
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Okay. I understand now.
What's the cause of the failure? Is your engine completely stock?
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2016 Nightfall Gray Camaro SS |
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03-20-2015, 09:39 PM
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#7 |
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Jumanji
Drives: '14 Z/28 - AGM - No A/C Join Date: Mar 2014
Location: Alaska
Posts: 1,693
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OP. Sorry to hear about your motor. Hopefully you can get quick resolution on warranty work. I would be sure to have the engine rebuilt versus replaced if it were mine.
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03-20-2015, 10:35 PM
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#8 |
       
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,824
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LS7 failures happen most often with faulty valve guides and dropped valves...please post the exact failure once it is diagnosed
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
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03-21-2015, 12:21 AM
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#9 |
 Drives: 2015 Z28 Join Date: Feb 2015
Location: SF Bay Area
Posts: 10
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Sucks....
See what the dealer can do for you
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2015 Z28 Track Car
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03-21-2015, 12:28 AM
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#10 | |
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Drives: 2015 z28 sold Join Date: Dec 2014
Location: As
Posts: 80
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Quote:
Yea the motors stock. The cars was on redline 1050w oil I can't really go into many more details...warranty is pending. I ran the track the same way in my 2013 boss for almost 2 years and a GTR and had no problems. |
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03-21-2015, 01:03 AM
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#11 |
Drives: One of the baddest handling Gen 5s Join Date: Feb 2011
Location: Masachusetts
Posts: 4,177
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"Code po300 and po306 come up for misfire", those two codes look soooooooo familiar.
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03-22-2015, 02:53 PM
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#12 |
Drives: 2013 ZL1 Join Date: Mar 2013
Location: Oklahoma
Posts: 2,326
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Please report back here so we will all know what happened. I hate to here you had this trouble.
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03-22-2015, 08:32 PM
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#13 |
 Drives: 2012 Ram 1980 Malibu Join Date: Apr 2013
Location: Otherside of the screen
Posts: 362
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Sounds like thee ol Z06 valve drop
Hope its not and hopefully GM will take care of you |
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03-23-2015, 07:23 AM
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#14 |
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Drives: 2014 white Z/28 Join Date: May 2014
Location: Pa.
Posts: 69
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Sorry to hear You had problems with your motor. Kinda takes a little pride In ownership away from you when this happens so soon in taking ownership of a vehicle. With all the hype this car has from G.M. calling it a "street Legal" racecar I would hope you would be fine because you are just doing what this car was designed to do. Right? Now I can only hope you can get past this unscathed and regain what you lost and get back to having fun with your car.
Last edited by bptman; 03-23-2015 at 08:20 AM. Reason: Bad chioce in wording |
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