Where can I locate my ecm , map sensor and main relay? Also does my cel say check engine on it cause if so I don't think it's working? I don't think it's my main relay cause I;m getting plenty of spark and fuel it just seems the timing and/or mixture is off. What do you think?

Where can I locate my ecm , map sensor and main relay? Also does my cel say check engine on it cause if so I don't think it's working? I dont think it's my main relay cause I;m getting plenty of spark and fuel it just seems the timing and/or mixture is off. What do you think?
What are you driving?
Year, make and model, as well as engine option if any...

99civic

Slow down! Yer going to choke!
Three or so post with the same question??

How do you know the ECM is your issue?
It happens that the ECM is located under the right side of the dash, near the kick panel.
Don't do anything to th ECM until someone has told you to do it!

I'd rather you provided some good info on what's happened and how your car is running, rather than just keep thowing parts at it, hoping the problem will solve itself...
Helpl us help you...