Question about 1991 Buick Riviera

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Car runs good until it heats up then it shuts off

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Change the temp sensor.

Posted on Jul 24, 2009

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Air runs until car runs a distance and engine is shut down. when restart air is not cool?


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Car runs great until it get about 180 degrees andthen shuts off let it cool off a lil bit its starts back up until it shuts off again why


I am thinking that perhaps the temperature sensor is reading wrong and therefore sending a message to the computer that the car is running too hot. This can happen, my VW presently reads 20 hotter on the guage than a heat gun records at the temp sensor location on the head. If you have access to a heat gun it might be a good idea to check out the actual temperature, but it probably won't hurt to change the sensor.

The other problem that occurs to me is the oil sending sensor. While a temperature sensor won't shut an engine down, the oil sender can. If it is reading a large drop in oil pressure it will shut the engine off. Since oil gets thinner as it gets hot, perhaps a defective sending unit is reading it as too low. Once the oil cools off, it would restart until the temperature gets too high again. I would think that upgrading to a heavier oil might cure the problem. I don't know what you are currently usung but certainly you could go to 10W30 or 10W40 without too much trouble, at least for a test. Hope this helps.

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How do you burp cooling system on a 1995 grand cherokee 6 cylinder


Turn the engine on and leave it idle with the rad cap off and the heater on full heat and the fan on high,let the engine run until you feel heat from the vents in the inside and then shut off the motor.Wait until the engine cools some and top up the coolant,put the cap on and then you will be good to go.

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Is there a thermostat shut off switch . car runs


The amount that it gets hot is a clue but theres no shut off switch. It's possible that the car is over heating and the temp gauge does'nt have enought water over it to report the problem. once the cooling system is cleared as it's full circulating and the fan will come on when it's hot ( disconnect the temp. switch on the therostate cover on the top of the transmission, ( the stat is in the lower hose ) with it disconnected and the key on the fan should be on and connected f till it's real hot. The crank senser or distrubutor module can can too hot and shut down too

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these are well known for the ignition module failing when they heat up when the power is turned off the resistance is to high for the module to restart

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