This website is the largest Honda Civic owners club in the UK, there are people on here who are very knowledgable and includes friendly members and meets all year round for your area.

Probaly the most knowledgable people in the world for the D-series type Honda engine, i found this site very usefull during the build and development of my old Civic

Advanced electronics advice for Honda OBDI and OBDII systems and option to download such programs as Crome to help with home tuning via your ECU