1994 honda del sol D16a9 DOHC engine non-Vtec

I just bought this car and found that the distributor was modified to be adjusted and locked far more advanced than normal. Did they modify the ECU in this case? I replaced the distributor with new unit TD43U and upon installation and testing the car did not start. After fixing back the one i removed (modified), the car did not start either. What is wrong and what do you recommend?