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1992 Cadillac Deville GAS MILEAGE

Tiny
KATAMAN1
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 10,000 MILES
For years I got 25-26mpg on highway. Now I get 18mpg. In the city the mileage is the same-13mpg. I had a complete dealer tuneup, converter and fuel injectors cleaned. Where are the map/maf sensors located? After I check the sensors what else can I do?
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Thursday, March 26th, 2009 AT 11:33 AM

1 Reply

Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
Looking straight at the engine, the right side will be against the firewall and the lift slide towards the front of the car;
1. The map sensor is located on the right rear side of the throttle body;
2. The maf sensor is located on the right side vale cover;
when you took your vehicle in for a tuneup, did they change the fuel filter? You may want to do a compression check, make sure you don't have any weak cylinders, the vehicle may need a vale job at 100,000 miles
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Thursday, March 26th, 2009 AT 12:26 PM

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