Started up the 91 CRX HF after it's been sitting around this weekend. Took longer than expected (battery might have been drained some). After it finally turned over, it was idling rough. Then the check engine light came on, checked the code and found it to be 3 blinks = Manifold Absolute Pressure (MAP Sensor). Vacuum lines checked, wiring checked, and I'm considering replacing the map sensor then starting from square 1 again, maybe even replacing the vacuum lines with new ones.

Since the motor is obd1, should I take this opportunity to convert to an obd1 map sensor? If that still doesn't fix it, where should I be looking for a problem?

 

either map will function the same, I would just use the one on the firewall

 

What do I need to do to get to the bottom of this?

 

fixed the pos connector.