gas mileage has dropped to 5.5 miles per gallon what can be wrong

i used to have a few of these cars and loved them! the gas mileage was GREAT! i dont know if that old a car has a MAF? i didn't even know what a MAF was back then! it probably has a MAP though! i'm tryin to to remember if its a carb or a single injector throttle body? i might even have a book on it around. so check MAP for hose good and connected first.

also 86 renault WHAT? alliance?

Forgive me but i dont have a clue as to what
either MAF or MAP is \ the engine os2.2 liter fuel injected and is in my lLesharo RV

what was gas mileage before? MAP sensor is vacuum operated sensor detecting engine vacuum pressure to alter fuel flow to injectors. also ECT engine temp sensor has effect on fuel delivery. check for vac lines loose/broke/cracked.

Thanks for your help have ordered a rebuilt air flow meter and will try to carefully check all related vacuum lines including temp sensor
Hope for the best am not sure of exact mileage before but it was much better thain now thsnks again ****