I hope someone can answer this or has seen this problem previously. I've done a bit of reseach already, but have found very little that compares to or explains my problem.

I have a 96 Civic LX with original D16Y7 engine in it. Lately, the engine wants to idle at 2000 rpm. This happens after it's driven about 3-4 miles(not enough to fully warm up the engine, but well on it's way). I know the ECU tells the engine to run at high idle to warm up the engine, but 2K is a little too high, and it's never done it before so I know it's not normal. Now, if I shut the engine off, and restart it, it will idle at 1K or just a bit below just like it should.

Is this an Idle Air Control Valve issue, a sensor issue or something totally different? The car is an automatic and I don't like putting that much torque on the engine mounts by shifting in and out of park at 2000 rpm.

Any suggestions??

BTW, I have a pretty good knowledge of vehicles so feel free to go as far in depth as need be.

Thanks!!