gas mileage...tried all the normal stuff

[aparker813]

with mostly city driving in my 99 auto gt im only getting only about 170 TOPS. when i got the car in august i had the fuel filter changed,new spark plugs, had to replace a COP, oil is good, its lowered and i just added a steeda straight shot...any other suggestions? i punch it every now and then but dont have a lead foot or anything, anything else i should be checking?

 

[97gtblue]

yeah a gas leak maybe

 

[ponysarepretty]

MAF? O2 Sensors?

 

[aparker813]

MAF? O2 Sensors?

cleaned that with some electical cleaning spray also...how can i check 02s? i know they arent throwing any codes, not sure how else to check em

 

[DBMSTNG]

what kind of driving do you do? city or highway or a mix? how many gallons are you using for that 170miles?

 

[billfisher]

if city only that all you get. hwy 28@60 mph. of course that is a thing of the past. i really doubt the 5.4 willl get that good. wife's ricer gets 34.

 

[deftsound]

i get 25on the highway doing a mix of speeds, usualy around 70mph, city i get around 18 or 19 but i have a 5spd

 

[aparker813]

on my drive up to school when i first got a tank got me 275miles of straight up highway, no city at all driving around 75-90 the whole time, so around 170 city is about average for an auto gt? up here at school the only driving i do is in the city since all i drive to is school and stores and what not...except for the occasional joy drive to wherever

 

['13_ImpactBlue_GT]

Hell 170 aint average for an auto GT, before I changed my fuel filter I got about 270-280 miles per tank and at least 50% of my driving is around town (speeds up to 55-60).

 

['13_ImpactBlue_GT]

I forgot to ask what kind of mods do you have??

 

[ponysarepretty]

How long do you normally drive for? If its like 10 minutes, then that is petty much expected

 

[aparker813]

i also seafoamed...but yea usually my trips 15min or less, average around 45 or so

only mods are the steeda intake and weld-in flowmasters as far as i know

 

[billfisher]

i get 385 miles to a tank on the highway.(used to)

 

['13_ImpactBlue_GT]

i get 385 miles to a tank on the highway.(used to)

How?

 

[97gtblue]

i believe it i ust to get 340 to a tank when mine was bone stock and running 93 shell gas

 

[ADRENLN]

im +checking mine right now, but last time i checked i only got about 170 to the tank. i could be off. ill let you know what im done this tank. i do have more mods then you though.

 

[97gtblue]

yeah... i wonder if cams make a difference in milage

right now mine gets about 200 to a tank

 

[jasonh_86]

I get about 240-260 a tank, that's city ONLY driving.. 5-spd.. and i get on it every other day.. sometimes more ... poor car

 

[Tommy 00GT]

every time i had bad gas mileage it was because of exhaust leaks