MAP Sensor is under hood, passenger side, upper firewall, mounted in control box.
The idle for a 1986 Honda Accord is adjusted by a idle air control valve. These function by either tightening or loosening the valve. This controls how much air is allowed into the system, more air means higher idle and less means lower.
Intake valve .003, exhaust valve .005.
.003 in
on drivers side of engine below bypass air control valve near oil fill cap two wire connector.
Valve clearance (cold) Intake 0.005 to 0.007 in Exhaust 0.010 to 0.012 in
The fuel control cutoff unit, in your 1986 Honda Accord, is located on top of the fuel injector pump. The fuel control cutoff unit is contained in a sealed box.
On a 1986 Honda Prelude, the O2 sensor is typically located in the exhaust system, specifically on the exhaust manifold or just downstream in the exhaust pipe. It is usually positioned before the catalytic converter. To access it, you may need to raise the vehicle and potentially remove any heat shields that cover the sensor.
my clymer states 0.08mm (0.003in) intake and exhaust
If you mean a reserve fuel switch, there isn't one. just a shutoff valve.
http://www.ecklerscorvette.com/corvette-hot-water-control-valve-for-cars-with-air-conditioning-1986-1987.html
Cold settings are Inlet 0.12-0.18 mm Exhaust 0.15-0.18 mm
cold intake is 0.003 in or .07 mm cold exhaust is 0.003 in or .07 mm