my 87 crx si has a funny idle when i'm at a red light it idles from 1500 to 1000 moving back and forth sounding like it wants to stall but it doesn't. the map sensor is no theres no vaccuum leaks and spark is new as well. is there any other things i might check.

 

Check your timing. Its probably that.

 

Well before u say theyre are no vac leaks get urself a can of intake manifold cleaner and spray it on the vac lines, see if it boggs at all, if it does there is a leak

 

i'll try both today. does any one know if tb's on the crx and any other honda with 60mm from 56 fit