My idle on my 88 civic is all over the place high and low and then sputterry, however it runs perfect on the highway and driving anything about 2 milesan hour.

I am wondering what to look for, I haveno check engine light, I have no leaks on my lines, andI just replaced the rotor and cap and wires. HELP

Motor id a 15D

 

You can try adjusting your fast idle thermo valve, cleaning your iacv, and bleeding air from your cooling system. Double check for vacuum leaks as well.

 

try cleaning or replacing the idle air control valve