I have a 1993 Civic Si with a b18c5 out of a 97 Integra. The car will run fine one day then the next it will idle low then stall out without it even in gear. The oil, coolant and everything is fine. When it start to idle the oil and check engine light come on but like I said the oil is perfectly fine. If anyone else has had this problem or knows how to fix let let me know.
Thanks, Matt.