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Old 10-19-2020, 09:22 PM   #142
HoodCheck

 
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Drives: 2018 ZLE (M6/hyper blue)
Join Date: Nov 2015
Location: Lithia, FL
Posts: 762
A bit of an older thread I stumbled across here, but there was a lot of talking in this to blame it on headers...the issue does exist without headers too. I've had 3 cars (a 2012 2SS, a 2015 Z/28, and a 2016 2SS) that all had the issue when completely stock. The Z/28 actually got a bit better after adding ceramic coated headers (the new owner said it still cranks slow occasionally but has never failed to start; when I had the car, hot starts weren't any different than cold starts). The Z/28 I have now has the same issue, but only has the headers wrapped. I plan to ground the block, and possibly pull the headers to have them coated.
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