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really bad gas milage

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Old 02-14-07, 05:29 PM
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1sxyrxy
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Default really bad gas milage

well i get hella bad gas milage on my car.. basicly i put 30 bux in at about 3bux a gal. wasnt really paying attention to price. so i figure thats around 11 to 12 galons. im getting like 14 to 13. mpg.. that is hella ****ty . i bought some brand new walker 02 sensors hoping that would fix the problem.. my car passes smog with ease and im getting really ****ty gas milage. that was mostly freeway too. car drive fine and pulls fine doesnt ever act up.. whats your guy's imput
Old 02-14-07, 05:31 PM
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96gti2.0t
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both my 2jz cars seems to be getting poor gas mileage not sure exactly what they get but id be interested to know
Old 02-14-07, 06:00 PM
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1sxyrxy
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im just gonna replace everything i can think of prolly next week, new FPR, fuel filter, plugs wires cap and rotor and check for a vac leaks
Old 02-14-07, 06:28 PM
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yelloa3gti
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dont push so hard on the gas pedal all the time.. around town i get 15-18mpg and 20-23 on highway.. im pretty hard on the car too most of the time
Old 02-14-07, 06:34 PM
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1sxyrxy
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i did a test to see how could i get get.. i drove like a freakin grandma and got ****ty *** gas milage. rar
Old 02-14-07, 06:39 PM
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Originally Posted by 1sxyrxy
well i get hella bad gas milage on my car.. basicly i put 30 bux in at about 3bux a gal. wasnt really paying attention to price. so i figure thats around 11 to 12 galons. im getting like 14 to 13. mpg.. that is hella ****ty . i bought some brand new walker 02 sensors hoping that would fix the problem.. my car passes smog with ease and im getting really ****ty gas milage. that was mostly freeway too. car drive fine and pulls fine doesnt ever act up.. whats your guy's imput
just some quick math

$30 at $3 a gallon is 10 gallons...

now, what you need to do, instead of guessing, is do some real testing...

fill up the car until the gas pump stops pumping by itself... set the trip meter to 0, now drive... drive hard, drive easy, just drive one way consistently for at least half, and preferably 3/4 of the tank. Now, you think you're done, but no... now, go fill up with gas at the exact same place, using preferably the same nozzle and pump and let it shut off automatically again...

write down your mileage and divide by exactly how much gas you put in the car, include decimals, it makes a difference...

I get 15-19 mpg in my sc400 in town, and 25+ on the highway... it takes some control on the highway, but it's doable...
Old 02-14-07, 06:51 PM
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ki_soarer
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$3/gal?!?!?!?!?!? holy crap! im glad its only about $2.30 here for premium.
Old 02-14-07, 07:44 PM
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I think you need to redo your math. I drive pretty hard and even I get more then 13-14 mpg.

Maybe you should try filling up all the way and then see how much milage you get out of a full tank. That is the only real accurate way of finding out your mpg.
Old 02-14-07, 08:26 PM
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reset your ecu. either pull the fuse or unhook the battery and let the ecu relearn its fuel/ignition maps and see if that helps. its always good to do it when the seasons change to get optimum performance and mileage.
Old 02-14-07, 08:45 PM
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o2 sensors, fuel filter, wires, plugs, rotor, cap, ignitors, seafoam, tb cleaning, new filters, reset ecu, fill up with 91+.. all i can think of.
Old 02-14-07, 10:34 PM
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i did the math before.. i pumped like 12.08 galons once, and did the math and only got like 14 mpg. it was really bad.. like i get really bad gas milage. its almost like i can watch my needle drop. it just seems like its dumping fuel somewhere but i dont know where. its driving me crazy. im pretty sure its not supposed to be this ****ty guys
Old 02-14-07, 10:36 PM
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my mileage is pretty bad too. i got 11mpg once.. now averaging 13mpg city..

i need help too
Old 02-14-07, 10:39 PM
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after i do a full tune up im gonna do a full tank test
Old 02-15-07, 07:14 AM
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that happened to me, too. here was my 2 issues:
  • original fuel filter
  • binding front brake caliper
Also, reset the ECU, it'll take you 2 minutes
Old 02-15-07, 08:06 AM
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and if its still bad, get a new OEM gas cap, the seals go bad on them. there less than $20. i just fileld up and got 18 and i was driving like an idiot.


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