Code error that shop got was P1399 which can be related to cylinder misfire but based on my research ( http://www.honda-tech.com/showthread...1962862&page=2 ) this error is generic but generally relates to a misfire.

They wanted $800 to replace all 4 injectors which they said would clear CEL, as 1 injector was leaking and other 3 injectors are running lean. I decided to take a chance and just have them replace #2 leaking injector in hopes that it would clear CEL, but it didnt, but rough idle has improved, virtually non-existence with a/c off. With a/c on the idle is still rough but not as bad as before replacing #2 injector.

The car is currently for sale on craigslist although I was hoping to fetch at least 3k if I was able to clear CEL.

http://atlanta.craigslist.org/atl/cto/1428634496.html

 

With that many miles, have your ever replaced the O2 sensor? It will cause numerous rich/lean conditions when it wears out.

 

After having 2 reputable shops diagnose issue and neither mentioned o2 sensor which has never been replaced, I assumed it wasn't a problem. It would be an easy and inexpensive fix but still an expense with no guarantee that it would resolve issue.

I hate diagnosing engine issues as it seems it can be hit or miss. If I was keeping the car I would def replace all parts mentioned in this thread myself, but I really was trying to get a good sell price for the car. I have a couple of potential buyers so if for some reason I don't get my asking price I will proceed with replacing individual parts to try and clear CEL.

 

id replace the throttle body sensor