I'm not so sure what to say about the ignition. But I am purchasing a 91 integra for 1k also. And I'm just asking but do you live in a cold region of the united states. Because on certain models of the 91 acura integra, there is a Fast Idle Thermo (FIT) valve which allows extra air into the intake manifold when the engine is cold, causing the idle speed to increase. on the vehicle i am looking to purchase, the FIT valve is set to california altitude and temperature. I'm in south dakota though where the altitude is a little higher and its a little colder. so the idle likes to fluctuate, but its completely normal. i hope thats helped you some