Question about 1986 Toyota Celica

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Computer overheats i think car turns over and doesnt stay running where is the sensor

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Computers dont over heat and what sensor are u talking about roniecon@gmail.com

Posted on Jun 28, 2009

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I had the same problem - my 95 4Runner would overheat in 4WD only, and coolant would bubble out and spill over.

The problem turned out to be with the rear heater tubes and the fan clutch - my mechanic bypassed the rear heater tubes and I have no more problems. Not exactly sure why this helped. To replace the rear heater tubes, it would've cost $325, but to bypass cost $75. Most people don't even really use the heat in the back seat.

The second part of the problem, and most important, was the fan clutch needed to be replaced. At low speeds, it wasn't kicking in when it should have been, only working at higher speeds. Once I replaced the fan clutch and the bypassed the rear heater tubes, all has been well.

Hope this helps!!

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95 grand am radiator fan only runs with AC on


Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment.
I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson

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