Fuel Gauge Problem - AudiWorld Forums

Go Back   AudiWorld Forums > Audi Models > Audi TT / TT-S / TT-RS > TT (Mk1) Discussion
Log In 


TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

Fuel Gauge Problem

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-04-2010, 03:31 PM   #1
Audiworld Junior Member
 
Join Date: Apr 2009
Posts: 13
Default Fuel Gauge Problem

I have 02 Quattro coupe with 67K miles, which I bought used (I'm third owner). I've had car for 9 months, and drive it about once a week. Instrument cluster was replaced by Audi dealer just before I bought the car in Mar. At one point a few months ago after topping off, and while at idle, the gauge dropped to zero and an alarm sounded (steady beep). After five seconds or so, the alarm quit and the gauge returned to full (position before the alarm). From that point on, gauge is inaccurate. Now, after filling, fuel gauge reads full for about 200 miles, and then will move slowly to half-full. For the next 100 miles, needle will drop to 3/8 full and no further. I just topped tank and it took 14.4 gals. I've gone through car's maintenance history and it's never had a fuel gauge problem. I'm unsure what to do. I hate to have to take it to the Audi dealer. I have a local mechanic but if there is any chance this is due to the instrument cluster replacement then I suppose I do have to take it to the dealer. Any help appreciated.
LTTLWHT is offline   Reply With Quote
Old 01-04-2010, 06:38 PM   #2
AudiWorld Super User
 
AudiMick's Avatar
 
Join Date: May 2002
Location: Redmond WA
Posts: 5,119
Default

Quote:
Originally Posted by LTTLWHT View Post
I have 02 Quattro coupe with 67K miles, which I bought used (I'm third owner). I've had car for 9 months, and drive it about once a week. Instrument cluster was replaced by Audi dealer just before I bought the car in Mar. At one point a few months ago after topping off, and while at idle, the gauge dropped to zero and an alarm sounded (steady beep). After five seconds or so, the alarm quit and the gauge returned to full (position before the alarm). From that point on, gauge is inaccurate. Now, after filling, fuel gauge reads full for about 200 miles, and then will move slowly to half-full. For the next 100 miles, needle will drop to 3/8 full and no further. I just topped tank and it took 14.4 gals. I've gone through car's maintenance history and it's never had a fuel gauge problem. I'm unsure what to do. I hate to have to take it to the Audi dealer. I have a local mechanic but if there is any chance this is due to the instrument cluster replacement then I suppose I do have to take it to the dealer. Any help appreciated.
Sounds like the senders need cleaning or replacing. They get corroded (ethanol in the fuel is a culprit). And it's not just Audis. My Ford pickup has this problem.

You can try the "techron fuel system cleaner" trick . Add a couple of bottles of this stuff to a several full tanks of gas. It sometimes cleans up the senders.

Remove both senders and clean with a pink pearl eraser. About half way down the page. If you DIY it's a couple of gaskets.

http://forums.audiworld.com/showthread.php?p=16766762

FYI: Vag.com is a great piece of software to have if you plan on keeping your car for any length of time. VAG.com can test the cluster for you.
__________________
2001 180 TTQ coupe (sold)
1976 Triumph Spitfire
2008 A4Q 2.0T (sold)
2003 A4Q 1.8T (sold)
1996 A4Q (sold)
AudiMick is offline   Reply With Quote
Old 01-04-2010, 08:30 PM   #3
AudiWorld Member
 
Join Date: Jun 2002
Posts: 276
Default FSU's

In my Roadster, I have had the Fuel sending units out (x2). Dont forget to buy new gaskets prior to opening your tank. Your existing ones will NOT reseal.

The fuel sending units get worn from the float arm rubbing on them constantly. Once you remove the arm and FSU from the tank sometimes you can clean them. Be careful! The FSU is made by VDO and is printed on ceremic and is easy to break. If you pull it out and see that the pads are gunked up, just use a light abrasive like scotch brite and water to clean. If the pads are worn off, you will need to replace.

Good luck.
__________________
CartoonDog is offline   Reply With Quote
Old 01-05-2010, 01:39 PM   #4
Audiworld Junior Member
 
Join Date: Apr 2009
Posts: 13
Default Thanks

AudiMick and CartoonDog, I appreciate the information. I'll use the Techron now to see if I'm lucky. Maybe it will do the trick. I've sent the information you gave me to my mechanic. If we have to pull the sending units then he'll know exactly what to do. He'll also be able to run Vag.com check for me on the instrument cluster. If it's bad I can take the car to the dealer. I checked with them today and the cluster is still under warranty. You recommend that I purchase my own Vag.com, which I will do since I plan to keep this car until I kick the bucket. But can you recommend to me what or which to buy? I'd rather bypass the learning curve part of this process and use whatever it is that you recommend. Again, thanks for your help. Invaluable.
LTTLWHT is offline   Reply With Quote
Old 01-05-2010, 02:57 PM   #5
AudiWorld Member
 
Join Date: Jun 2002
Posts: 276
Default Vag com

The Ross Vag com is nice, and it will allow to easily test your dash/fuel gauge. I would get the USB version. I have an earlier serial version which is kinda a pain, but does work. The Vag com will help you solve problems yourself instead of guessing or taking it to a mechanic and have him guess at your expense. Do note, it is not a magical oracle and will require some trouble shooting and experience. One of the best features is that you can clear faults- if they come back you have a problem, if they dont your good!

I would just plan to change your FSU, and save yourself some bucks. Its about a two beer job, say 3hrs. All said and done, no more than $300 bucks including parts.

Goodluck.
__________________
CartoonDog is offline   Reply With Quote
Old 01-06-2010, 06:11 PM   #6
Audiworld Junior Member
 
Join Date: Feb 2007
Posts: 32
Default

Mine did that.

Would show empty with 5 gallons in tank.

First time they replaced fuel sender.

2nd time they replaced cluster under recall.

Its doing it a third time, my guess is they will replace cluster with a stock cluster that has the same inherent problem.

It will work for a while then go bad again.
alan93 is offline   Reply With Quote
Old 01-07-2010, 10:11 AM   #7
AudiWorld Super User
 
AudiMick's Avatar
 
Join Date: May 2002
Location: Redmond WA
Posts: 5,119
Default

Quote:
Originally Posted by alan93 View Post
Mine did that.

Would show empty with 5 gallons in tank.

First time they replaced fuel sender.

2nd time they replaced cluster under recall.

Its doing it a third time, my guess is they will replace cluster with a stock cluster that has the same inherent problem.

It will work for a while then go bad again.
You said they replaced " fuel sender".

There are (2) on a quattro, is your TT FWD?
__________________
2001 180 TTQ coupe (sold)
1976 Triumph Spitfire
2008 A4Q 2.0T (sold)
2003 A4Q 1.8T (sold)
1996 A4Q (sold)
AudiMick is offline   Reply With Quote
Old 05-15-2010, 07:07 AM   #8
Audiworld Junior Member
 
Join Date: Apr 2009
Posts: 13
Default

Follow-up re my problem with fuel level sensors: Fixed!!! The Techron did the trick. I actually used two bottles of the Techron and two bottles of a Gumout equivalent, filling the tank with Chevron gasoline each of the four times. Again, thanks for the tip. Without the Forum I would have had to have these sensors replaced unnecessarily.
LTTLWHT is offline   Reply With Quote
Old 02-26-2011, 11:24 AM   #9
Audiworld Junior Member
 
Join Date: Feb 2007
Posts: 32
Default

SOrry for late follow up.

I did not know there were 2 fuel senders.

I had it replaced again and it fixed it. Between cluster and FS it required 3 repairs in 3 years. All under warranties thank goodness.
alan93 is offline   Reply With Quote
Old 02-28-2011, 04:53 AM   #10
AudiWorld Member
 
Join Date: Aug 2006
Posts: 246
Default

Does anyone know the part numbers for the gaskets that need to be replaced?
My car does the exact same thing and I would like to try and pull the senders to see if I can clean them.
typ44q is offline   Reply With Quote
Old 05-16-2012, 05:27 AM   #11
AudiWorld Newcomer
 
Join Date: May 2012
Posts: 2
Default Dream Car turning into Nightmare..........

I bought a 2002 TT last June....One month later, it was in the shop racking up a $1560.00 bill for a clutch and flywheel that for the most part had just crumbled into pieces....Two months after replacing the clutch and flywheel, it was back in the shop getting new coil pack, spark plugs, and fuel filter....about 6 months later back to the shop to replace the Oil Pressure Sensor.....Now, they tell me that the Catalitic Coverter is going out but they aren't sure which one?????? And my dash cluster is on the fritz and telling me the tank is empty, I go to fill the tank and it only takes $7.00???? So my questions are, how bad am I going to want to shoot either myself or the mechanic when he tells me how much it will cost me to replace the Catalitic Converter(s) and is the fuel gauge problem the dash cluster or the fuel sensor and would anyone like to buy a 2002 Audi TT??????????
BlondeMoxie is offline   Reply With Quote
Old 05-16-2012, 08:03 AM   #12
AudiWorld Newcomer
 
Join Date: May 2012
Posts: 2
Default another one for ya

Here's another question for you.....After all the mechanics that have looked and worked under the hood of my 2002 Audi TT, not a one of them has caught that the belt flipped.....While unclogging the PCV valve I noticed it.......any suggestions on the best way to get to the belt to flip it back?
BlondeMoxie is offline   Reply With Quote
Old 05-16-2012, 07:48 PM   #13
AudiWorld Super User
 
AudiMick's Avatar
 
Join Date: May 2002
Location: Redmond WA
Posts: 5,119
Default

Quote:
Originally Posted by BlondeMoxie View Post
I bought a 2002 TT last June....One month later, it was in the shop racking up a $1560.00 bill for a clutch and flywheel that for the most part had just crumbled into pieces....Two months after replacing the clutch and flywheel, it was back in the shop getting new coil pack, spark plugs, and fuel filter....about 6 months later back to the shop to replace the Oil Pressure Sensor.....Now, they tell me that the Catalitic Coverter is going out but they aren't sure which one?????? And my dash cluster is on the fritz and telling me the tank is empty, I go to fill the tank and it only takes $7.00???? So my questions are, how bad am I going to want to shoot either myself or the mechanic when he tells me how much it will cost me to replace the Catalitic Converter(s) and is the fuel gauge problem the dash cluster or the fuel sensor and would anyone like to buy a 2002 Audi TT??????????

How many miles, catalytic converters usually go for 120,000 miles or so, it's all one pipe so not sure what your mechanic is talking about? If the gauge agrees with the "miles to empty" in the central display it's the sender. If not it's the gauge (cluster), you can test it with a program called VAG.com. The clusters were subject to a recall long expired.

You can do cheap fixes for this stuff if you DIY, but it doesn't sound like an option.The senders can be cleaned using an pink eraser (believe it or not) just replace $20 of tank seals when you do it. Chevron makes a fuel cleaner that you add to your gas that can sometimes clean the fuel senders. I have used it a couple of times, it's the ethanol in the gas that corrodes the TT fuel senders.

Coil packs were a free recall, sounds like you had the run-around. Clutch at $1560 isn't that bad. That's a huge amount of work on a Quattro.
__________________
2001 180 TTQ coupe (sold)
1976 Triumph Spitfire
2008 A4Q 2.0T (sold)
2003 A4Q 1.8T (sold)
1996 A4Q (sold)
AudiMick is offline   Reply With Quote
Old 06-27-2012, 05:33 AM   #14
AudiWorld Member
 
Join Date: Jun 2009
Posts: 103
Default

Boys..on what year TT's were the clusters recalled?
imncrxtc is offline   Reply With Quote
 
 
 
Reply

Tags
01, 2002, 2005, 42, a4, audi, empty, fuel, fule, gas, gauge, geage, quattro, s4, working

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Questions about various 2001 TT Repairs ThomBoh TT (Mk1) Discussion 8 08-08-2015 09:58 AM
Instrument Cluster gauges issue andyred A4 (B5 Platform) Discussion 0 08-03-2015 12:40 AM
Fuel gauge not working from half to empty zafirovp A6 / S6 (C6 Platform) Discussion 1 07-31-2015 05:34 PM
2011 Q7 Overheating Bizarre Temp Gauge Readings jayada Q7 Discussion 2 07-27-2015 05:39 PM


All times are GMT -8. The time now is 04:11 PM.


Copyright 2014 AudiWorld.com Audi Enthusiast Community