no it cant cause the pm5 from 87 is fully carbd and the 89 its carbd injected
That is actually incorrect. In my 87 Civic Si and also 85 CRX si the ECU is located underneath the passanger seat. under the dash board next to the fire wall
i dont see why not, my 87 Z31 is running with a 86 ECU (figuring by the codes iv pulled so far are all 86 codes) my car is a 4/87
driver side under dash
Put a key in
answer 87 octane
no.
grade 87
Yes u can
behind the left (drivers side) "kick panel"
NO, they will not fit.
Probably not. the 87 should be carb and the 91 should be injected not a good fit w/ the ECU. The electronics are not compatible.
should just be regular 87 octane.