1988 acura legend Coupe with multiple problems maybe pointing to ECM?

What is your question?

1988 acura legend Coupe, The tachometer stopped working, motor has hesitation, and stalls when I put the car in reverse a couple times and started back up after 15 minutes, check engine light comes on after 10 minutes of driving, I cleaned out the terminals on the shift position console switch which since the dashboard display doesn't show what gear its in and the car appears to be always taking off from 2nd gear on, when gear is put in drive or S3 no difference, when I start the car the computer under passenger seat and footboard both flash light once