General Honda Civic Forum Archive. The archive is dedicated to storing threads for research purposes only, please place questions in their appropriate forum.

why is my car bad on gas?

 
Thread Tools
 
Search this Thread
 
Old Nov 21, 2003
  #1  
shelsuspensions's Avatar
Thread Starter
Registered!!
 
Joined: Mar 2003
Posts: 60
Likes: 0
Rep Power: 0
shelsuspensions is an unknown quantity at this point
why is my car bad on gas?

hey, i have a 2003 civic lx 5spd. 1 year old. i have an intake, took out the power-steering, and a whole lot of suspension mods.....but, why is my gas mileage really bad!!!!!!i tried all different styles of driving and shift points, but it's still drinks like a V6. my friends twin cam integra 5spd saves more gas????? i thought civic's are suppose to be really good on gas????
Old Nov 21, 2003
  #2  
FALKEN's Avatar
Civicforums Junkie
iTrader: (55)
 
Joined: Oct 2002
Posts: 16,087
Likes: 0
From: ARIZONA
Rep Power: 448
FALKEN is a glorious beacon of lightFALKEN is a glorious beacon of lightFALKEN is a glorious beacon of lightFALKEN is a glorious beacon of lightFALKEN is a glorious beacon of lightFALKEN is a glorious beacon of light
what do you consider 'bad'??
Old Nov 21, 2003
  #3  
djmota's Avatar
Premium Member
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (34)
 
Joined: Jun 2002
Posts: 3,242
Likes: 0
From: so cal djmota=oscar
Rep Power: 323
djmota is just really nicedjmota is just really nicedjmota is just really nicedjmota is just really nice
when was the last time you cleaned the filter on your intake?
and have you reset the ecu after installing the intake or removing the power steering?
Old Nov 21, 2003
  #4  
shelsuspensions's Avatar
Thread Starter
Registered!!
 
Joined: Mar 2003
Posts: 60
Likes: 0
Rep Power: 0
shelsuspensions is an unknown quantity at this point
bad means that it gobbles more gas than a 1.8 twin cam integra, 2.2 twin cam prelude. i had a mazda mx6 V6 before this car, and i think the gas mileage is the same....i'm just expected a lot better gas mileage from an econo-car.

how do you reset the ecu????
Old Nov 21, 2003
  #5  
kjgracing's Avatar
Hail to the king baby
iTrader: (3)
 
Joined: May 2002
Posts: 2,325
Likes: 0
From: NorCal
Rep Power: 315
kjgracing will become famous soon enoughkjgracing will become famous soon enough
check your spark plugs...if they are bad they can easily rob you of 15hp and significantly
lower your gas mileage.
Old Dec 5, 2003
  #6  
03civicdx's Avatar
Registered!!
 
Joined: Oct 2003
Posts: 273
Likes: 0
From: Arlington Heights, IL
Rep Power: 0
03civicdx is an unknown quantity at this point
check the sparkplugs air filter, tire pressure and even try using a differnt brand of gas shell and citgo have very good gas in my opinion but maybe thats just me but check those three things
Old Dec 5, 2003
  #7  
Sickboy's Avatar
Registered!!
iTrader: (3)
 
Joined: Sep 2003
Posts: 693
Likes: 0
From: Boise
Rep Power: 282
Sickboy will become famous soon enoughSickboy will become famous soon enough
I have an 03' EX with 14k miles and my mileage has slowly gone down from 30mpg to 25mpg. Is this bad gas mileage to you? In my case it's probably the air filter and possibly plugs, I'll eventually check and reset my ECU when I get some free time.
Old Dec 5, 2003
  #8  
Green Civic's Avatar
Registered!!
 
Joined: May 2003
Posts: 2,464
Likes: 0
From: Luling, Louisiana
Rep Power: 0
Green Civic is an unknown quantity at this point
You can reset your ecu by taking the positive off the battery and leaving it off for 10-15 minutes. Then put the positive back on and start your car. What gas milage are you getting? You never said. I get 38-39 in my 2001 ex coupe.
Old Dec 5, 2003
  #9  
Zzyzx's Avatar
Autocross Junky
Hey! Look At Me!! I'm a Supporting Member!!
 
Joined: Oct 2002
Posts: 7,211
Likes: 0
From: Las Vegas, Nevada, US
Rep Power: 380
Zzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond reputeZzyzx has a reputation beyond repute
How are you measuring gas milage? by compairing Miles to gallons consumed, or by how often you have to fill up the tank?

I ask this because there is a big difference between the two. Miles/gallons is the right way to do it. How often you have to fill up is determined by how large your gas tank is (ours is 12 or 13 gallons).

Need info........
Old Dec 5, 2003
  #10  
SMX's Avatar
SMX
Registered!!
 
Joined: Oct 2002
Posts: 364
Likes: 0
From: Bay Area, California
Rep Power: 0
SMX is on a distinguished road
I drive with the pedal glued to the floor and never get less than 30 mpg. This is with i/e mods and 16s. If you're getting less than that you have a mechanical/ECU problem.

When you reset your ECU, let it idle for 10 minutes or so before driving it. I understand that gives the system time to figure out what it's doing.
Old Dec 5, 2003
  #11  
civicskater's Avatar
Chicks dig my scent
 
Joined: May 2003
Posts: 1,185
Likes: 0
From: Hickville, NC
Rep Power: 0
civicskater is an unknown quantity at this point
Do you have larger wheels, 17s or 18s? I think when i put my 17s on (33pds w/tire compared to 30pd stocks) i lost some gas mileage, but i also my need to clean my filter. But yes, reset your ECU, i might try this too....will doing it cause the CEL to come on? Or any other crazy ish?
Old Dec 5, 2003
  #12  
Sickboy's Avatar
Registered!!
iTrader: (3)
 
Joined: Sep 2003
Posts: 693
Likes: 0
From: Boise
Rep Power: 282
Sickboy will become famous soon enoughSickboy will become famous soon enough
You had 30lb stockers? Did you mean 40lb.?
Old Dec 5, 2003
  #13  
Explosivo's Avatar
The dog told me to do it
 
Joined: Apr 2002
Posts: 1,592
Likes: 0
From: Fort Lauderdale, Florida, US
Rep Power: 0
Explosivo is an unknown quantity at this point
Yeah... I was going to say that you really need to post what your mpg rate is, before anyone can tell you anything. I think I am getting between 28-30mpg w 50/50 street/highway driving.
Old Dec 5, 2003
  #14  
CivicHX01's Avatar
Premium Member
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (14)
 
Joined: Sep 2001
Posts: 3,101
Likes: 0
From: Los Angeles, CA
Rep Power: 0
CivicHX01 is an unknown quantity at this point
i get about 40 mpg on my HX... try not to shift above 2.5k and don't press the gas pedal all the way...
Old Dec 6, 2003
  #15  
dKj's Avatar
dKj
Registered!!
 
Joined: Jul 2002
Posts: 345
Likes: 0
From: Bay Area, California, US
Rep Power: 0
dKj is an unknown quantity at this point
i get about 350 miles for 9/10 gallons, i reset my trip a thing everytime i fill up. but i have an 01, and there was a recall on sumthin with the gas tank, but my light goes off hella early so i dont even bother looking at it
Old Dec 6, 2003
  #16  
EnProceso's Avatar
98% of people will die in their lifetime
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (11)
 
Joined: Feb 2003
Posts: 10,823
Likes: 0
From: Bay Area, CA
Rep Power: 401
EnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questionedEnProceso should not be questioned
it might be the intake, i changed from stock to injen CAI (and reset the ecu) and it still killed my MPG, used to get 330 miles on a full tank, now 275 more or less...
Old Dec 6, 2003
  #17  
Whelan's Avatar
Registered!!
 
Joined: Sep 2003
Posts: 635
Likes: 0
From: Milford, CT
Rep Power: 0
Whelan is an unknown quantity at this point
with my AEM cai Im gettin 280 steady but I fillup before the light goes on just below a 1/4 tank. On highway trips to see my gf in VA I pull 350.
Old Dec 6, 2003
  #18  
CuRiOuSfIsH's Avatar
Back From The Banned!
iTrader: (13)
 
Joined: Nov 2002
Posts: 5,226
Likes: 0
From: Queens, New York, US
Rep Power: 338
CuRiOuSfIsH is just really niceCuRiOuSfIsH is just really niceCuRiOuSfIsH is just really niceCuRiOuSfIsH is just really nice
there are so many things to look at when talking about gas milleage. Like, driving conditions (traffic), driving style.... although gas milleage has also gone down somewhat on my car (average of 36 to 32/33) these 2 months, I find it it's b/c I either have the need to pass and mash the pedal or downshift to a lower gear. But I tried driving like I used to and it went back up to 35.... so....
Old Dec 9, 2003
  #19  
TemjinX2's Avatar
Registered!!
iTrader: (11)
 
Joined: Nov 2003
Posts: 4,576
Likes: 0
From: Lakewood, 562
Rep Power: 320
TemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to all
i have a 2004 ex civic coupe auto, it has about 1200miles on it. I get around 24mpg when i rev high and accel fast and about 29mpg when i drive around 3000rpm or below. I get about 33mpg on the freeway. I think thats pretty good mileage, i dont mind paying $10-15 for gas when i use to pay $20-30 for gas with my old car.
Old Dec 9, 2003
  #20  
greeot's Avatar
Registered!!
iTrader: (2)
 
Joined: Aug 2003
Posts: 292
Likes: 0
Rep Power: 0
greeot is an unknown quantity at this point
i get about 33-35mpg, but its mostly highway driving.
Old Dec 11, 2003
  #21  
KeNsHiN's Avatar
LEVA
iTrader: (1)
 
Joined: Sep 2002
Posts: 4,226
Likes: 0
From: California, US
Rep Power: 0
KeNsHiN is an unknown quantity at this point
i say take into the dealer and see what they say
Old Dec 11, 2003
  #22  
civicskater's Avatar
Chicks dig my scent
 
Joined: May 2003
Posts: 1,185
Likes: 0
From: Hickville, NC
Rep Power: 0
civicskater is an unknown quantity at this point
will resetting your ECU really help? Has anyone tried this?
Old Dec 11, 2003
  #23  
TemjinX2's Avatar
Registered!!
iTrader: (11)
 
Joined: Nov 2003
Posts: 4,576
Likes: 0
From: Lakewood, 562
Rep Power: 320
TemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to all
i figure my ecu is still learning the way i drive. Thats my my mileage is a little down.
Old Dec 13, 2003
  #24  
MangoEX's Avatar
Just Be
iTrader: (2)
 
Joined: Nov 2002
Posts: 2,775
Likes: 0
From: San Fernando Valley
Rep Power: 0
MangoEX should not be trusted
Originally posted by TemjinX2
i have a 2004 ex civic coupe auto, it has about 1200miles on it. I get around 24mpg when i rev high and accel fast and about 29mpg when i drive around 3000rpm or below. I get about 33mpg on the freeway. I think thats pretty good mileage, i dont mind paying $10-15 for gas when i use to pay $20-30 for gas with my old car.
I get the same exact milage, 24 MPG/240 Miles per tank MAX. thats 100% city stop and go so cal driving (so cal seems to have a curse on fuel milage)

One time on the freeway with a full car, i got 33 mpg on a highway trip.

Old Dec 14, 2003
  #25  
TemjinX2's Avatar
Registered!!
iTrader: (11)
 
Joined: Nov 2003
Posts: 4,576
Likes: 0
From: Lakewood, 562
Rep Power: 320
TemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to allTemjinX2 is a name known to all
i just wished our gas tanks would hold more gas so i dont have to refill my gas tank every week and a half.
 
Related Topics
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Tedverseti
Wheels, Tires & Brakes Modifications
6
Apr 23, 2020 01:45 PM
McD
1st - 5th Generation Civic 1973 - 1995
4
Apr 29, 2015 03:50 PM
bsmiley
7th Generation Civic 2001 - 2005
3
Apr 27, 2015 01:27 PM
dooner24
Mechanical Problems/Vehicle Issues and Fix-it Forum
1
Apr 14, 2015 07:51 PM
Gunner
Engine DIY
3
Oct 6, 2012 12:37 PM




All times are GMT -5. The time now is 02:14 AM.