i have an 85 buick electra, sometimes when starting it, it will reve at a high r.p.m. i shut it down and will try again, usually it will eventually slow down.. this morn, it had no power going down road, it popped under hood and had even less. let it set a min it then took off okay.. have changed coil plugs and wires ignition moduale??

Optional Information:
1985 Buick electra 3.8 ??

Already Tried:
coil new, ignition moduale, plugs wires.