Got spark & Fuel but won't start

[KidsgotaGTR]

Converted to MAP last year. Car started but ran very rough. One of sensor leads was not solid (voltage was not same for both). Repaired the lead, checked with Power Fc and both sensor are equal voltage. But now it won't start. Fires once or twice but that is all. Definitely rich on fuel. Checked spark, all plugs are good.

At a loss to know what to check now.