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Terrible Fuel Economy - 6G Celicas Forums

Topic #19453 49 posts Started by exxtractor
Using 87 octane I'm getting approx 20-21 MPG.

Man my '94 1.8L ST auto is just getting brutal fuel economy... don't get me wrong its probably the way I drive, my typical commute is 45 miles round-trip (35 miles HWY/10 CTY), and I have bad habits like aggressive acceleration for green, driving 65-80 MPH on HWY. Last time I posted a few months ago it was 22. Amazing when I hear peole say they are getting in the 30's. Guess I should change my drivng habits... maybe not.
Have you done a tune-up on your car? Have you tried slowing down for a tank of gas to see if you get better economy?

It's possible that you need a tune-up or O2 sensor.

New Toyota project coming soon...
i don't think it's your driving habits. i'm having the same problem and i think we just need a tune up.

-dstrb

This post has been edited by dstrbcelica: Dec 16, 2004 - 2:21 PM

former celica owner.
I was gunna say, I thought i was getting terible, like somthing was wrong. I was getting around 24 mpg, and thought that was crap. Then I replaced the plugs, cleaned the air filter, and started driving a l,ot slower and shifting around 2500-3 compared to 3500-4. I got then around 30 mpg. It seemed to much of a pain to drive like that though. So now i drive norm. I still will accel kinda quick, but shift into higher gears faster, and cut out the always trying to race people an ****. so now im getting around an average of 26mpg. I would say replace your fuel filter, that would most likley help alot and prolly hasnt been changed. Come to think bout it, I should do the same.
I'm pretty good about trying to take care of the car, had the plugs changed at 87,000 miles. Regular oil and service, but I don't belive the oxygen sensor has been changed... possilby for the life of the celica. Might do that at the next oil change. Would changing the fuel filter have any effect?
Yes it will. A fuel filter clogged up with junk will kill your gas mileage. A new fuel filter wouldnt hurt and maybe sometime in the future flush your fuel line?
I just changed my fuel filter on my geo prizm (4a-fe). It wasnt all that bad to do. Just please remember to use TWO washers. One on the top side fuel line fitting(out > going to engine) and one on the bottom side of the out line. I forgot to check if both were on and it looked like my new fuel filter was a water fountain lol. The in line(from gas tank) is a metal line that you unscrew using a open wrench from the underside of the vehicle when its on a ramp or jacked up. Put something under the fuel filter too so you dont get it all over your driveway. I looked on my 95 GT and it looks MUCH easier to change on the celica than the prizm.
-exxtractor+Dec 16, 2004 - 1:47 PM
QUOTE(exxtractor @ Dec 16, 2004 - 1:47 PM)
Using 87 octane I'm getting approx 20-21 MPG.

Man my '94 1.8L ST auto is just getting brutal fuel economy... don't get me wrong its probably the way I drive, my typical commute is 45 miles round-trip (35 miles HWY/10 CTY),  and I have bad habits like aggressive acceleration for green, driving 65-80 MPH on HWY.  Last time I posted a few months ago it was 22.  Amazing when I hear peole say they are getting in the 30's.  Guess I should change my drivng habits... maybe not.
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I don't think its driving because i'm getting the same and i've changed my driving habits. I remeber when i bought the car it was getting around 26-30. So i think i'll try tune up first.

All I have in this world is my Balls and my Word and I'm not breaking em for no one,- Tony MontanaTeam 6gc 2005

Yeah my auto ST hardly gets 20mpg and I only drive it hard once in a while, such as going 100 on the freeway once every couple months. Other than that it shifts when it feels like it, I hardly ever take it to redline.

I replaced my air filter a while back but there was no noticeable difference, let us know how much the fuel filter helps if you decide to try it out.
agreed, I get a bit over 20 also. >frown.gif>>frown.gif>>frown.gif>>frown.gif>>frown.gif>>frown.gif> I think it's the O2 sensors though.
Honestly speaking... 20 mpg or so is very very poor. Your cars may need some serious tune ups. My Celica got 38-40 mpg during a road trip last summer... and still currently gets well over 30 mpg around town... Time for a tune up perhaps?

Oh yeah... and I drive the crap out of my cars... ;]

"It's ok to be naked girl... I'm an artist!"1995 AT200 Celica ST:stocked out daily driver...1984 AE86 Corolla GT-SR5:silvertop 20V 4AGE project car jacked up with goodies...1991 SW2x MR2 n/a:bare bones hardtop model soon to be...
Something is definatly wrong. I get 33-34 mpg with 148K miles on it. O2 sensor, fuel filter, and tune up ASAP.

my st205 swapandour Beams swap
For reference, I rarely see over 30mpg. 20-22 is very very normal. 7mpg is my record.

And UK gallons are bigger as well.

I'd debating attaching a bucket to the tail pipe to catch all the unburnt fuel it spits out.

JDM ST205Blitz Spec NUR Exhaust, somewhere over $1000Needing another one 18000 miles later, bloody annoying.
-Mr_E+Dec 17, 2004 - 1:29 PM
QUOTE(Mr_E @ Dec 17, 2004 - 1:29 PM)
For reference, I rarely see over 30mpg. 20-22 is very very normal. 7mpg is my record.

And UK gallons are bigger as well.

I'd debating attaching a bucket to the tail pipe to catch all the unburnt fuel it spits out.
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Yeah... but these are 7AFE engines we're talking about here... You have a gas guzzleing snail... ;] Also, I don't think the UK has as many long straight roads as in the US so you don't get as good of cruising MPG also... =P

"It's ok to be naked girl... I'm an artist!"1995 AT200 Celica ST:stocked out daily driver...1984 AE86 Corolla GT-SR5:silvertop 20V 4AGE project car jacked up with goodies...1991 SW2x MR2 n/a:bare bones hardtop model soon to be...
The man has a point.....

>biggrin.gif>

JDM ST205Blitz Spec NUR Exhaust, somewhere over $1000Needing another one 18000 miles later, bloody annoying.
augh! i just checked and I get about 18mpg. 18! ...maybe my o2 is bad after all.
how would i go about checking if the o2 sensor is bad, i don't have a cel going off or anything?

All I have in this world is my Balls and my Word and I'm not breaking em for no one,- Tony MontanaTeam 6gc 2005
Just saying the same as them all. get a tuneup. only reason i'm really posting is to say that i drive a 94 gt stick and i have probably worse habits than you as with the aggressive accel on a green light and about 100 down freeways. i run a 30/10 back and forth to school everyday. I get about a week of driving on 20$ of gas (2.18 over here when i tested). Round about 27mpg
I just went from Oshkosh to the Metrodome in Saint Paul this weeknd back and forth and filled up twice. Averaged about 35 mpg. >smile.gif>

EDIT: That's with 165,600 miles too.

This post has been edited by vangSTa_celica: Dec 20, 2004 - 4:47 PM

A Jaws4God Creation...
i get about 27 mpg city and about 35 hwy, and i drive it hard!
-Kwanza26+Dec 16, 2004 - 3:58 PM
QUOTE(Kwanza26 @ Dec 16, 2004 - 3:58 PM)
Honestly speaking... 20 mpg or so is very very poor.  Your cars may need some serious tune ups.  My Celica got 38-40 mpg during a road trip last summer... and still currently gets well over 30 mpg around town...  Time for a tune up perhaps?

Oh yeah... and I drive the crap out of my cars... ;]
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ain't that the truth

i got 25mpg in the city when my ST was turboed!

currently my sister is getting like 21 mpg. thats just horrible. i assume its her driving, but i will change out the plugs, air filter, fuel filter, and maybe even the o2 sensor.

btw, my wrx gets 21-22mpg in the city, and believe me, there are times when i really get into it. lowest mpg i got was 16mpg, but that was for the very first tank, which included the test drive, and showing everyone what the car had.

30mpg on the freeways

1994 Celica GT4 WRC Edition@gt4.wrc on Instagram
Lab vs Reallife

Spoke to the Toyota service rep., he suggested that you are better to compare to vehicles of the same age and model, then the quoted stats from Toyota. So looking at my post, we have: exxtractor (me), dstrbcelica, drocay, funnyboy, fallenhero and MrE (not sure model) who are all reporting real world fuel economy of around 20-21 MPG. I don't think I'm really that worried since it seems for many of us with the 7AFE 1.8L from 94/95 this is probably ok. Sure you are always going to get someone who gets 30 MPG with their 94/95. But to spend the cash to replace the fuel filter, oxygen sensors, and a tune-up on a 10 year-old vehicle... I'd rather not. I'm just going to do my routine maintenace and hopefully I can get anotehr 2 years and then I'll buy a new car.
dude... I can smell gas in my exhaust when the car is running. it's so flaimin out of tune you could blow fire out the tail pipe.

Jon= getting the car worked on after brakes are installed.)
but do any of u guys know how i could check to see if o2 sensor is problem its kinda expensive to just buy one and wing it and then not know which o2 sensor is causein the problem.

thanx.

All I have in this world is my Balls and my Word and I'm not breaking em for no one,- Tony MontanaTeam 6gc 2005
Remove it and you can see how dirty and cloged it is. I eye balled mine and changed them. They were rusted over and all nasty lookin. Otherwise, wait for the CEL light.
-exxtractor+Dec 21, 2004 - 7:51 PM
QUOTE(exxtractor @ Dec 21, 2004 - 7:51 PM)
Lab vs Reallife

Spoke to the Toyota service rep., he suggested that you are better to compare to vehicles of the same age and model, then the quoted stats from Toyota.  So looking at my post, we have: exxtractor (me), dstrbcelica, drocay, funnyboy, fallenhero and MrE (not sure model) who are all reporting real world fuel economy of around 20-21 MPG.  I don't think I'm really that worried since it seems for many of us with the 7AFE 1.8L from 94/95 this is probably ok.  Sure you are always going to get someone who gets 30 MPG with their 94/95.  But to spend the cash to replace the fuel filter, oxygen sensors, and a tune-up on a 10 year-old vehicle... I'd rather not.  I'm just going to do my routine maintenace and hopefully I can get anotehr 2 years and then I'll buy a new car.
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Even still 20 is ridiculous. As far as the cash goes if you spend maybe 300 bucks for all the stuff needed for a tuneup and DIY, you will save easily over that amount of gas in the 2 more years you plan on keeping the car. How many miles does your car have now? If you keep up on planned maintenance....not just regular maintenance, your going to keep your car operating at maximum performance. You mentioned you got the plugs and wires done at 97,000 so Im guessing you dont have much more than that. My 94 ST auto when it had 103,000 averaged 32mpg.

As far as the lab vs real world mpg....I now have a 5 speed GT. Toyota says 22 city, 28 highway. In summer I AVERAGED 29mpg. Now I average 27. My car has 105,000 miles.
*bump*

my problem seems to be fixed. i just flushed the fuel system. everything seems to be in working order again.

-dstrb

former celica owner.
really man, that sounds great wut mpg are u getting as of now.

All I have in this world is my Balls and my Word and I'm not breaking em for no one,- Tony MontanaTeam 6gc 2005
-Drocay+Jan 1, 2005 - 1:24 AM
QUOTE(Drocay @ Jan 1, 2005 - 1:24 AM)
really man, that sounds great wut mpg are u getting as of now.
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iono...i still haven't filled it all the way yet. but, it's better. i'll bump this again after i've gone through a full tank.

-dstrb

former celica owner.
cant you just try a higher octane,i might try an fit a octane converter,it fits on the fuel line after the filter and converts 96 octane to 99,costs £55,might be worth it,any way what are you guys complaining about,at least you dont pay £0.79 per litre,that works out about £40 per tank,scandelouse!!!!