Question about 2002 Toyota Corolla

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2002 corolla randomly overheats and feels like it misfires turn the heat on and engine cools down. already replaced thermostat any ideas. no leaks 98k miles

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  • taterbug726 Jul 17, 2009

    its just really random i replaced thermostat about 2 months ago and was fine until today. fans are on and blowing the right way. no it only starts to misfire once it overheats then clears up. no oil in coolant or coolant in oil that i can see. is it possible for head gasket

  • taterbug726 Jul 17, 2009

    its just really random i replaced thermostat about 2 months ago and was fine until today. fans are on and blowing the right way. no it only starts to misfire once it overheats then clears up. no oil in coolant or coolant in oil that i can see. is it possible for head gasket

  • taterbug726 Jul 17, 2009

    its just really random i replaced thermostat about 2 months ago and was fine until today. fans are on and blowing the right way. no it only starts to misfire once it overheats then clears up. no oil in coolant or coolant in oil that i can see. is it possible for head gasket

  • Brad Rabon May 11, 2010

    HOW LONG DOES IT TAKE FOR IT TO OVERHEAT? IS IT STILL MISFIRING? ALSO SEE IF THE FANS R WORKING.

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Check for collapsing (soft) coolant hose on intake side of waterpump at engine above idle rpm.
Check condition of system pressure cap.
Check operation of cooling fan/s- fan temperature sensor switch on engine may be faulty.
Check system has correct fill of coolant and no air locks exist when re-filling- bleed off any airlocks as may be necessary.
Check radiator coolant core not blocked.

Posted on Jul 17, 2009

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You should also make sure that your AC cooling fans is running. There are fuses and solenoids in the fuse box that can sometimes go out. When you AC is on this fans will turn on. If not, it could create a lot of extra heat.

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