P0300 code - LS1TECH - Camaro and Firebird Forum Discussion

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Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

P0300 code

Old 10-12-2018, 01:14 AM
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have a 2006 CTSV, I have kooks long tubes, high flow cats, running ngk 7 spark plugs as I am tuned to run a 75 shot. Car has been on a trailer for about 2 weeks as I have just moved cross country. Went to drive car to gas station and started misfiring terribly bad, I have never had a problem before with the car. And it just started throwing a P0300 code. Pulled all the plugs and they donít look too terrible and wires look fine. I am about to replace all of them. And every once in awhile I will mix a little bit of 110 with 93 gas. I know itís scrabbled but any options would be awesome.
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Old 10-12-2018, 09:52 AM
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Have access to a scan tool? If so figure out what cylinders are misfiring with a miss fire counter to narrow down the problem cylinders.
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Old 10-12-2018, 08:48 PM
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Run it empty and try fresh gas before you get too excited? Where from and to? Elevation and humidity can do things.
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