I have a 94 cx adnn every day i fill my resivor half way up and have to put about a cup of water in my radiator.... It isnt smoking white or anything... doesnt run hot... but caseus my car to surge from 800-1500 regardless if it is hot. Problem just started a day after i changed my intake manifold gasket caseu it had a whole in it.. I am only throwing one code... and that is O2 sensor... If you could let me know what i could do to fix bother problems of it surging and losing water.... And were do you think it is going ...

 

possible head gasket leak. surge because of a air leak. intake gasket or a vacuum hose

 

sprayed carb cleaner around intake manifold and on all hoses and there was no leak..... I have heard that if it was the head gasket wouldnt it blow white smoke out ...? might not be right but just heard that.....

 

I am having and have had the same problem in my Si. It was a pinch in the vaccum hose before. Funny enough, my car was loosing water too. Hmm..

 

Check your oil for mikly coloring, the anitfreeze could be leaking in the motor. A blown headgasket usually mean white puffy clouds coming out the exhaust. The coolant has got to goes somewhere, it just doesn't vanish. Find where its going and you will find the problem.