Question about 1992 Acura Legend

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My question is about the horrible gas mileage my 94 acura legend has been getting this past year. started eliminating possible causes , oil change, air filter change, air in tires. fuel cleaning additive. blah blah.. i could really use some expert advise. gas prices where i live are 3.93-4.13 prGal. With the 18 gal tnk. this was the most expensive fill up($85) ive ever had. i know that this car is heavy and even when new didnt really get good gas mileage. WHAT ELSE CAN I DO???? thx PAUL

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You didn't mention how many miles you have on your car.. regardless

The original mpg ratings on this car according to the US Dept of Energy were
Automatic - 16 / 19 / 24 mpg Manual - 17 / 19 / 22 mpg on premium fuel.

Sounds like you have done all the obvious things and I assume your tires are all season or hwy tires and fairly new..not snow tires..

The other odd thing.. does the heater work properly? Does it take a long time for the car to warm up..? Believe it or not a faulty thermostat will really affect gas mileage as the engine will struggle to get to proper operating temp. and your mpg will suffer.

Do a good coasting test.. find a hill.. coast.. check the tracking of the car when you apply brakes. Look at the tire wear.. is it even.. check the wheel bearings for noise.. and a draggin brake or slighly engaged emergency brake.

Depending on the transmission.. again.. all items in the drive line need to be as close to perfect as possible.. any slop in the driveline will rob you of fuel..

There isn't a lot more you can do other than make sure all the other things are in the best possible working order .. alternator, ac compressor, power steering pump etc.. and remember when you run your defroster it typicall engages the ac compressor.. depending on model but almost always above an outside temp of 40 degrees. Doesn't really affect much at hwy speeds.. but around town it may.

Since you didn't mention what your current mpg is..if you are within one or two of the above figures.. chances are it's not going to get any better no matter what you do.. the last thing I can think of is weight.. if your hauling a bunch of junk around.. lose it. Some folks have all manner of items in their trunks.. tool boxes chains.. etc etc..

Best of luck..

Posted on Mar 30, 2011

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I don`t quit remember if this year it had fuel injection or not but if it is change the thermostat,as it does affect fuel mileage as it shows the computer that it is running colder than it really is.thus increasing injector on time.i`m presuming this is fuel injected and a bad throttle position sensor(tps) could be causing a problem if it has a maf sensor there could be dirt on the sensor wire that just needs to be cleaned.if its carbureted then the carburetor may need to be rebuilt.

Posted on Mar 30, 2011


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