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  #1  
Old 07-12-2021, 01:33 PM
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Missing gas cap now bank 2 misfires

My daughter told be the SES came on so I scanned the codes and found an evaporator leak fault P0442. When I check for the gas cap it was gone so I assumed the mystery was solved. Once I replace the gas cap and fired it up, the engine ran really rough - when I scanned again I got bank 2 lean codes and misfires. Note that the evaporator error has cleared itself since the screen shot. Seems a little too coincidental that these faults are not related to the missing gas cap, but it still does not name sense to me. Any ideas?
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Old 07-12-2021, 02:03 PM
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I would start by clearing everything and maybe even resetting adaptations and then see what comes up again.
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Old 07-12-2021, 03:08 PM
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As these codes popped up when the gas cap went missing, where was fuel added? Hope E85 was not used. I would add premium, clear the codes and run it.
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Old 07-12-2021, 03:27 PM
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the only code I had at first was the evaporator code. They the car sat for a couple of days while I got an OEM cap. I installed the cap, fired it up and it immediately ran terrible. Clearing codes does not help - the evap code is gone but all others remain
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Old 07-13-2021, 02:50 AM
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All those codes suggests either voltage problem or fuel supply problem.

Confirm alternator output 13.5 ± 0.3 including while driving with load eg high beams on and coasting to a stop (when revs drop from 2000> 600 is when voltage tends to drop)

Confirm fuel pressure starts at 50psi when key is turned on and that It will maintain pressure overnight (should read 20-30psi after 8 hours).
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Old 07-13-2021, 01:04 PM
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+1^
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