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1999 Toyota Corolla PO300 code rough running cylinder misfi

Tiny
JEREMYPFEIFLE
  • MEMBER
  • 1999 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
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.
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Tuesday, January 8th, 2008 AT 11:11 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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
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Wednesday, January 9th, 2008 AT 12:45 AM
Tiny
JEREMYPFEIFLE
  • MEMBER
  • 2 POSTS
Thanks for the help
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Saturday, January 12th, 2008 AT 11:26 AM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
ANOTHER THING TO CHECK IS REMOVE SPARK PLUGS. I BET THEY'RE FULL OF WATER WHERE THE PLUG WIRE TOUCHES THE SPARK PLUG.
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Saturday, January 12th, 2008 AT 11:49 AM

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