1985 Buick Electra 1985 Buick Electra Park Avenue

I change the ignition module, rotor, dist cap, egr valve, egr vacuum solenoid, plugs and wires. The car keeps on shutting off what am I'm missing to do also getting code 34 which according to the code book it means map sensor. I bought the egr vacuum solenoid which included the 4 pin connector map on it together with the switch and a round like cylinder behind it and wired all together with switch and I guess map sensor and switch. So want would be my next move.

Thanks Harry