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

Tiny
DICK76D
  • MEMBER
  • 1986 RENAULT
  • 46,000 MILES
This s eemed to happen quite suddenly mechanic says airflow meter
Wednesday, January 4th, 2012 AT 2:10 AM

5 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
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.
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Wednesday, January 4th, 2012 AT 2:27 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Also 86 renault WHAT? Alliance?
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Wednesday, January 4th, 2012 AT 2:32 AM
Tiny
DICK76D
  • MEMBER
  • 3 POSTS
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
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Wednesday, January 4th, 2012 AT 2:46 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
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.
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Saturday, January 7th, 2012 AT 10:32 AM
Tiny
DICK76D
  • MEMBER
  • 3 POSTS
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 ****
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Monday, January 9th, 2012 AT 2:00 PM

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