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2013 Chevrolet Suburban
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help needed with codes p0308 p0358/and coolant leak

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Old April 21st, 2012, 12:43 PM
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Default help needed with codes p0308 p0358/and coolant leak
I noticed about 500 miles ago that the coolant was low so I added some now it's low again. I didn't see any leaks, I then sarted to get codes p0308 (cyl 8 missfire) and p0358 (ignition coil H pri/sec circuit) also an unrelated code, I think, p0455 (evap systems leak gross) My thoughts on this were intake leak into # 8 cyl ? I checked # 8 plug and it looks fine. just checking to see what everyone else thought before I started this job

Thanks much
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Old April 21st, 2012, 5:10 PM
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ok quick update replaced coil on number 8 and that fixed miss ordered evap can should fix p0455 now still have to find coolant leak
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Old April 22nd, 2012, 7:19 AM
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Welcome to the forum,
Do you have the rear AC ? if so check at the rear quarter panel behind the tire for any leakage.
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