Question about 1997 Nissan Pickup

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My problem is when my car caught in traffic jams, temperature will increase rapidly...but when the car on went on usual, the temperature will be lower again..i want to know what is the actual problem? thanks

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1 low coolant
2 dirty radiator
3 faulty thermostat
4 faulty electric fan switch or clutch fan
5 faulty water pump
6 incorrect timing
Need to know more to be sure of actual problem.

Posted on Oct 08, 2010

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OK, if the fan is electric, it may not be going on or there could be a clogged coolant system that needs backflushed to bring it back to original cooling performance.

If the fan is driven by a belt, then the clutch may be slipping too much.

If it's an electrical problem, then replacing the relay, coolant temperature sensor, wiring harness connections, or the fans motor(s) themselves may be the solution.

Posted on Oct 08, 2010

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Have a look at this.

Posted on Oct 08, 2010

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Sorry, I do not know your car at all, but I had a similar problem on a Toyota Corolla. It turned out that the relay which cuts out the main electrical system had a loose connection which had to be re-soldered. That solved the problem for me. The rationale behind it is that usually when the car has just been started, the connection is cold and makes a reasonable contact. However, because the connection is not 100 per cent, it has resistance, which increases the temperature of the wires at the connection. This in turn increases the resistance which increases the temperature further, and all it needs is a little bump in the road to completely push the resistance over the edge, and the car cuts out - usually in peak traffic, right?
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