Question about 2002 Toyota Highlander

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I have a 2002 highland that started to blow white smoke from exhaust pipe... the engine light came on and after changing the gas cap, it went out....for awhile then it came on again.. I had diagnostics run on it to the tune of $200. they could not find anything wrong and reset the engine light. it stayed off for awhile then came on.again..it also has a dual fan system that only has one fan coming on and i thought that they were supposed to rotate, could this have anything to do with the engine.;iight? what shall I do?? li

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One fan is the a/c fan and the other is the coolant fan.if the smoke is from a bad head gasket and the engine is using coolant,the lack of pressure could be causing the coolant temperature switch not to come on.and the cooling fan will not work.that is if it is a dual electric fan set up.if the main fan is a clutch fan,it is electrically operated a little different.some products are known for intake and head gasket problems and the only way is to pressure test the system.was the gas cap replaced because of an evap code? excess water vapor leaking back into the intake manifold could trigger an evap code and fool alot of people into thinking it is in the evap/purge circuit.

Posted on Apr 26, 2010

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