idle problem

[bluedevil]

Hi all, i bought a 1995 3000gt (manual). There is a problem: i start the car and set off but after a while my car's idle begins to go up and down madly. when i gear neutral my rpm goes between 2000-2500 irregularly it sometimes climbes 3000-3500. After a while it goes normal (i think motor gets warm). I asked a mechanic and he said possible reason is air valve (i think it is idle air cntroller) is there anybody has an idea?

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[Shifty92]

sounds like it could be the iac for sure. my friends stealth was acting the same way you describe and the iac was the problem there.

[3KVT]

Had the same problem on my 93 VR4. IAC fixed it.