Question about 1997 Nissan Pathfinder

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97 nissan pathfiner 3.3l idles too high

I don't think I can adjust my idle on this car and I'm pretty sure there are no vacuum leaks. What to do, car hits 20 mph by itself and I'm wearing out my brakes. Could it be the Idle control valve or a Mass air flow sensor problem. Help!!!

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Sometimes there is a secondary relay on the fender or firewall if there is that needs to be checked to see if it is getting the proper currentif so it more than likely is your sensor

Posted on May 27, 2009

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It has been my experience that this problem is usually caused by a dirty or bad Idle Air Control Valve (IACV). I would try removing the IACV and cleaning it thoroughly, as well as the air passages in the intake manifold.
You can check the valve itself. Check the resistance between the two terminals with an ohmmeter. The resistance should be approximately 10 ohms at 77°F. Also make sure the plunger moves in and out without sticking or binding and the spring is not broken.

OK now the bad news, the (IACV) is at the back of the engine and up against the fire wall. Lots of bad words will be used to replacing this and i think the dealer charges $550.00 in labour alone.
You can try running Sea Foam through the manifold, just follow the instructions and there will be lots of smoke, Do a search on You Tube for Sea Foam. You can try blasting it with throttle body cleaner though a vacuum tube and down the throttle body, may have to use three cans, just follow the instruction again.
Good luck and keep me posted.

Posted on May 27, 2009


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