Well, if you know that your OVP relay is bad, I would suggest that you fix it.
Do you know that the OVP relay powers the KE-Jet control unit? With it dead you get NO starting enrichment or cold enrichment. But the car runs fine warm even though it still is missing acceleration enrichment.
The way you describe the symptoms you could have a secondary ignition problem. But, lack of fuel control is more likely since you say the OVP relay is bad.