I recently purchased an 00 GT from a local guy. Earlier today I noticed the check engine light came on only days before my smog. WOOHOO!! Anyways I went to lunch today from work and during startup the gauges went stright to redline, back down to zero, and then a second later the rpm's read normal. I turned the car off and started it 2 more times and it did the same thing. Then leaving the togos it started up with no problem. The car has 53k miles and idles perfectly with no sign of misfire. Any ideas?