What is the mass airflow sensor on a cadillac deville 83 what does it look like and where is it
Use only bp gas 93 octane and raise the ideling its 1 screw if I'm not mistaking on a black plastic housing can be seen above middle of engine its called speed idle control hope it helps you but you must use only super unleded gasoline in that car I have same car 108k miles runs like new I use only bp super gas 93 octane oh check all your plugs to be clean fom backfires acids residues god hope its helps you.coz repaires on that car at any garages almost will drain any one this days.good luck to you.
If its got a lot of miles (150k or so) id change the fuel filter it quick and easy its under the driver side rear door you can probably do it all with a pair of pliers