97 2.0 Eclipse not starting

Hello, new to the forum. Was wondering if anyone has any ideas on a problem I am having with my Eclipse. It starts and drives fine for about a week, then won't start. I am able to get it started if I unplug the MFI relay then plug it back in...starts right up? When started this last time I used the key method to get the code via the check engine light and the code is 43. Any ideas on what this might be or where to start with diagnostics? Thanks in advance for any input.

Please put your vehicle information into your signature since it makes it easy to identify your car. Looking @ the thread name, and your username, I'm assuming you have a 97 eclipse GS.

Code 43 - SRS warning light does not light.