Very poor gas mileage
#1
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I am averaging about 160 miles per gallon on my tank and my car is basically stock, only a cutout and the lid. I go WOT maybe 1 time every two days and shift relatively smoothly. Something has to be wrong because thats maybe 9 miles to the gallon, which is pathetic. Fuel filter? O2's? Thanks
EDIT: 160 miles of all city driving
EDIT: 160 miles of all city driving
#3
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Something is wrong. I get much better gas milage than that in my car with significantly more mods. Hopefully someone can chime in to give you an idea of what the actual problem is.
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im havign a similar problem. i just installed an intank walbro 255 and a timing tuner and my gas mileage dropped by alot. i went from like 16 mpg to around 10 mpg overnight. no check engine light or anything. any ideas?
Last edited by 2000slpss; 05-07-2006 at 03:19 PM.
#6
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ya same over here. . i used to get close to 200 miles on a tank but now im getting sumwhere around 160 - 180 depending on much high way . .and ihavent changed anything. .? it all started when my clutch started to slip im wondering if that could be the problem .
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ill average about 200 miles to a tank city-ish driving and about 220-225 highway-ish driving. pure highway driving would probably be close to 235-250 but ive never taken any long trips like that
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damn! on my 2001 z28 m6 I get over 300 miles to the tank city/hwy. I try to run as few appliances as possible. keep that a/c off! unless you have a passenger that requests it or something.
#9
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On my 2000 Z28 M6 I get between 260-300 around town and near 400 on the highway. I don't think that appliances could cause a loss that large to drop mpg to around 9. That is just horrible. 9 mpg $3.00 per gallon so you only get about 3 miles for every dollar of gas you put in.
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i dont really know wat i am talking about...but my car was getting **** for gas milage and my fuel pump just broke on me...i got it replaced and now i get alot better gas milage...just an idea?
#14
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i spoke with my tuner just recently and he told me thjat with the walbro i mpushing more pressure which is why its running soooooooo rich, he said with a little bit of tuning it'll be back where it used to be
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I get around 285 on a tank of gas, which is mostly high way miles, putting it in 6th gear at 60 mph, basically babying the car to save gas, it average around 21 miles a gallon which i think sucks considering the window sticker says 30 on highway, 19 city, with a 6 speed, and my car is stock for the most part. I ran it close to empy, put in 13.7 gallons of gas. I put some STP fuel injector carburator cleaner in there to see if it helps, if not I will try the STP gas stuff...
#16
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rear end gear ratios would help alot in this thread.
I know most Z-28s come with a 2.73. I have a 98 Trans Am A4 that has a 3.23 in it from the factory with a 3600 stall, lid, full lenghts,and an off road Y-pipe that gets about 180 miles per tank full of gas. The car got the same mileage before I put the converter and full lenghts/Y-Pipe on it. Does anyone have the same or close to the same combo ? If so what kinda mileage do you get ?
I know most Z-28s come with a 2.73. I have a 98 Trans Am A4 that has a 3.23 in it from the factory with a 3600 stall, lid, full lenghts,and an off road Y-pipe that gets about 180 miles per tank full of gas. The car got the same mileage before I put the converter and full lenghts/Y-Pipe on it. Does anyone have the same or close to the same combo ? If so what kinda mileage do you get ?
#18
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Originally Posted by 2000slpss
i spoke with my tuner just recently and he told me thjat with the walbro i mpushing more pressure which is why its running soooooooo rich, he said with a little bit of tuning it'll be back where it used to be