Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)
spg356

Fuel Gauge Stops at 1/2 Tank on 2001 996C4

Recommended Posts

I am aware of the saddle bags fuel tank setup I have on my 2001 C4 and that the gauge should estimate remaining fuel after 1/2 tank. However, my gauge just stops at 1/2 tank and stays there. Since it never reads lower it is up to me to estimate on my own how much fuel is left which has led me to run out of gas twice now, so I want to do something about it. After much searching here I read about many different issues with these C4's and their fuel gauge woes, just not this one in particular.

 

Any ideas? Thanks in advance.

Share this post


Link to post
Share on other sites

What you describe sounds to me like a problem with the fuel level sensor.  Should be an easy change out.

As you can easily fill up the tank, this does not sound like the fuel filler valve issue.

Good luck.

Share this post


Link to post
Share on other sites

I have the same problem, but my gauge stops at about 3/8 of a tank.  In my case I have an LS3 V8 so I've interrupted what ever metering device was there.  I've been told that

the sensor in the tank reads to the bottom of the middle tank, then the Porsche computer takes over and computes fuel left and miles to go.  So if my information is correct you have a mechanical read to the bottom of the center tank, then a computer read out for the remaining gas in the saddle tanks.

 

There must be a transducer to read fuel flow by the computer.  I tend to think you don't have a sensor problem, but a computer problem...  I'll be interested in what you come up with, it's a pain to have to be guessing how many miles to go.  In my case my mileage can fluctuate from 12 MPG to 24 MPG depending how spirited I drive the car.

Share this post


Link to post
Share on other sites

Thanks for the replies. We will do the recalibration as Loren provided to see where that gets us. Once done I will report back.

Share this post


Link to post
Share on other sites

I've had this problem since I bought my car - the previous owner had it as well, and he ran out of gas. ** My "fix" is to reset my trip Odometer each time I refill the tank. With a full tank, I now check my trip odometer on occasion and when I reach 200 miles I refill the tank. This leaves me a reserve of about 100 miles (roughly 5 gal.). While this isn't what I'd call an ideal situation, it has worked well for over two years now and I haven't run out of fuel - not even close...Last time I was at my local dealer I mentioned the fuel guage problem to the service manager, and asked if he could recalibrate my gauge - his response was "no that can't be done, we'd have to replace the fuel level sender unit"...That's why I don't take my car to the dealer...:cursing:

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.