Hi All,
Just my cars been running a little crazy latley and it finally spit out a code. I have a Code 45 O2 Rich. Any ideas or thoughts before i get started one basices. Anyone out there ever had this code if so what seemed to be the problem? Please any help would be nice

 

vacuum leaks.

bad injectors.

lots of reasons for it.

Hit the basics and do a goo thourough visual inspections.

Than follow the factory flow charts.

It either died rich or something is making it think it is(or something is dead and leaking or coolant tmep sensor)

later
Jeremy

 

how old is the O2 sensor

 

It's like brand new. The MAF was the problem, i return my MAF and kept the screens in. I'll data log it again once i drive it

 

Wouldn't the descreened MAF make it run leanner (More cfm=less fuel?) if anything. I'm running rich right now myself and found this thread on a search. I'm hoping when I get my headers back from Jet-Hot and replace my o2 sensor, it'll get better. I'll datalog mine as well and cross my fingers. I've tried to reprogram the ECU (even though she was rich before) and updated to from the 88 program ($6E?) to the 89 version ($32B?). Anyways, I was able to change my fan temperature on/off temp, but from what I read, Air/Fuel management is a bit more tricky. I hope to get her fixed before she has any longterm damage done. She's a daily driver for me. I'll update if I figure anything out myself, but I'm open to all suggestions!

 

It can make certain ranges leaner or richer. Depends I guess. With this Microtech I was Richer everywhrere almost. With my old Boash Sensor descreen i was richer only from 2000-2600. Anyway most of the time you have to make MAF or BMP( or fuel table) mods in your chip. to run clean