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Misfire

Old Sep 11, 2018 | 05:52 PM
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So I just got a 2001 camaro z28. Has 67k on it. Was told the car had its engine replaced with a 10k motor. Has 40 psi of oil pressure warm. I was driving today as it was raining hard and then I got back home. About a hour or two later I drove it again and it began to misfire and a SES light came on. Went to advance auto and got the following codes:
C0550
C0896
P0151 bank 2 sensor 1 intermit
P0174
P0300
P1380
Misfire
P0174 bank 2 system too lean
P0300
P0300
I know there are duplicates. He said there were multiple. It had a abs light on along with the brake light and the traction control being turned of. Probably water getting into the coils or o2s or a bad knock sensor. But if someone knows more let me know
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Old Sep 11, 2018 | 06:25 PM
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I had trouble with misfires in the wet and it was a bad coil pack. I also had water dripping through the cowl pins onto a coilpack.
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Old Sep 11, 2018 | 07:05 PM
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I’ve got one of those lights you put in between the plug and wire and it tell you if there’s spark. I think I’m gonna test it tomorrow and put dielectric grease everywhere. Then prob pull plugs and see what the gaps are. Maybe even compression test it
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Old Sep 12, 2018 | 08:18 PM
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So I tested the injectors and they all were the same resistance. Then I pulled the plugs and they were .040. I regapped it to .060. That’s what owners manual said. However when I went to drive it again it still misses. It wasn’t as bad when cold. Then when I get it warm i could tell it had a misfire. Scanned it and P0300 came up again (I cleared the codes before driving). When I came to a stop it idled weird. Anyone have any ideas?
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Old Sep 12, 2018 | 08:19 PM
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Also the plugs on the pass side were black with carbon
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Old Sep 12, 2018 | 09:32 PM
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You might want to check the RH O2 sensor....
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