I own a 98 honda prelude and I swapped in a f20b but since I'm using the h22a ecu it runs well but it is running rich, I kept basically everything from the h22 except the engine and transmission. I just need some help deciding whether to buy a f20b ECU or switching to a chipped obd1? Also if I went obd1 I see people saying it's a plug and play and others say I need to replace the dizzy, and other pieces for it to work what do you guys think?

 

Nothing needs to change in the engine bay if you switch to an OBD-1 ECU with a tuning solution (like Hondata s300). A "Chipped" ECU is just a HOPE that it runs correctly... getting it tuned insures it runs correctly.

 

chipped obd1 is not plug and play since you need to get it tuned

 

OBD 2 -> 1 jumper harness at ECU, OBD 1 ECU with Hondata (or similar), tune.