Back of the motor, in the center, close to the firewall. Only visible from under the car. Good luck
Under the dashboard in the left compartment
its located on the firewall in the middle at the top
The 1989 Honda Civic is not equipped with an EGR valve.
Under the drivers side dash
The spark plug gap for a 1989 Honda Civic LX is .044" (1.11mm).
On the 1989 civic lx, the fuel filter is to the left of the fuel injector system. Follow the fuel line to a metallic enlarged looking pancaked shaped filter on the back wall of the engine compartment area, and that would be in front of the center of the dashboard area, as it were. I assume it's the same with an 88, so check there first.. what fram oil filter fits a 1988 Honda civic 1500 DX?
In the intake manifold plenium, its a 2 wire sensor
The Throttle Position Sensor is located on the throttle body