rough and uneven engine idle
 

Hello, just bought a 90 Accord, and Im fixing it up so that is drivable. A few problems Im hoping someone can help me with:

When started, the engine idles a bit high, about 2000 rpm, and for about15 secs will idle up and down between 1200 and 2200 rpm, without touching the gas pedal. In addition, when I shift between drive, neutral and reverse, the engine idles differently as well. Is there a sensor that controls this? Any suggestions?

Thank you for any help

RE: rough and uneven engine idle
 

From the DIY section: https://www.hondaaccordforum.com/SUR...m_46125/tm.htm