1999 Toyota Corolla po300 code rough running cylinder misfi

1999 TOYOTA COROLLA
150,000 MILES • 4 CYL • 2WD • AUTOMATIC
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JEREMYPFEIFLE
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I went through a large puddle that com pletely covered the underside of the car. Car ran poorly immediately after. I ran a test and got po300, 302, 303 codes indicating cylinder misfires. It runs fairly well in neutral, but while in gear it misfires and runs really rough. I have checked, maf, cleaned all contacts I could. I thought maybe transmission sensor could be it, thanks ahead of time to any help.
Jan 8, 2008 at 11:11 PM
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RASMATAZ
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P0300 Random Misfire-try looking for vacuum leak and check the fuel for contimination, also check out the EGR system.

cylinder 2/3-check sparkplug/compression/injector on these cylinders-wires
Jan 9, 2008 at 12:45 AM
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JEREMYPFEIFLE
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thanks for the help
Jan 12, 2008 at 11:26 AM
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MASTERTECHTIM
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ANOTHER THING TO CHECK IS REMOVE SPARK PLUGS. I BET THEY'RE FULL OF WATER WHERE THE PLUG WIRE TOUCHES THE SPARK PLUG.
Jan 12, 2008 at 11:49 AM