bad fuel mileage

Reply Subscribe

Thread Tools

Search this Thread

Oct 19, 2012 | 02:51 PM

transamguy1

Thread Starter

Teching In

Joined: Mar 2012

Posts: 12

Likes: 0

bad fuel mileage

Hey guys I have a 94 T/A A4 and I get terrible mileage below 1/2 tank. I drive 2 miles and it takes 1/4 tank. I've read another post that says it could be the temperate sensor on the driver side below the head. It also said the icm but i dont have a code. I have gave it a tuneup and a brand new opti and exhaust. Any help? Thanks

Oct 19, 2012 | 03:05 PM

nitrous2fast

TECH Fanatic

iTrader: (2)

Joined: Dec 2010

Posts: 1,084

Likes: 0

From: Oklahoma

Are you saying that your car gets good fuel mileage above 1/2 tank??

Oct 19, 2012 | 03:28 PM

transamguy1

Thread Starter

Teching In

Joined: Mar 2012

Posts: 12

Likes: 0

It gets around 18 on the highway above 1/2. Below 1/2 it gets around 8, maybe not even.
So yes.

Oct 19, 2012 | 03:31 PM

nitrous2fast

TECH Fanatic

iTrader: (2)

Joined: Dec 2010

Posts: 1,084

Likes: 0

From: Oklahoma

That doesn't make any sense. Are you taking the total amount of miles driven divided by the total amount of fuel required to fill up?

Oct 19, 2012 | 03:33 PM

transamguy1

Thread Starter

Teching In

Joined: Mar 2012

Posts: 12

Likes: 0

i did that awhile ago but forgot the number.

Oct 19, 2012 | 04:10 PM

KyleW707

Launching!

Joined: Oct 2011

Posts: 253

Likes: 0

From: CenTex

Mine was doing this and it was the temp sensor. The one in the head just controls your temp gauge in your dash. The temp sensor in the water pump is the one you'll want to change. If you do this, be sure to not get any water on the opti, and make sure the car is cool, or the water will be hot when you take the sensor out.

Oct 19, 2012 | 04:21 PM

goldylocks

On The Tree

iTrader: (4)

Joined: Jun 2011

Posts: 112

Likes: 0

From: Sunnyvale, CA

the fuel gauge is not accurate so if you are going off of it, stop. Just take the total miles you drove, fill it up at the gas station and divide by the number of gallons it took to fill up. dont trust the fuel gauge

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Oct 19, 2012 | 05:06 PM

BigD383lt1

On The Tree

Joined: Sep 2010

Posts: 198

Likes: 0

From: Dunedin, Florida

It sounds to me the gauge is not reading properly... Mine the gauge goes way past full and then when I get to 1/4 tank I am basically on Empty. What sucks for me is I don't have the low fuel light so I have actually run out a few times!

Oct 19, 2012 | 05:40 PM

#10

93 LT1 Vette

TECH Regular

Joined: Apr 2011

Posts: 441

Likes: 0

From: Deep in the heart of Texas

Quote:

Originally Posted by BigD383lt1

I second the gauge problem. Unless you have one helluva dent in the tank, which would cause the 1/2 to E problem cuz your tank wouldn't hold a true 16 gallons

Oct 20, 2012 | 11:04 AM

#11

transamguy1

Thread Starter

Teching In

Joined: Mar 2012

Posts: 12

Likes: 0

well I just replaced the temp sensor and we will see how this week goes as far as gas mileage. Thanks for the help guys

Oct 20, 2012 | 08:53 PM

#12

93Euphoria

TECH Enthusiast

Joined: Feb 2012

Posts: 631

Likes: 0

From: Orlando

When the gas gauge reads 1/2 full its actually 1/4 full. Ill fill mine all the way up and itll stay at full for more miles then it would when it reads 1/2 to empty.