[flash]

it's been so long since i spent any real time driving the car regularly, that i can't remember how the gauge operated before. (yes, i know what the marks mean and how to read them - smart ass)



if i am going through a long sweeping turn one way, the gauge goes up a bit. if i go the other way, it goes down a bit. it's a slow process, taking a number of seconds, but it is consistent.



the gauge also seems to move very slowly downward (no, i'm not getting 40mpg). i will drive 200 miles, and the gauge will barely move 1/4 tank. then i stop, let it "rest" for a minute, get back in, and it's down to 1/2 tank. it just doesn't seem to accurately track the progress.



i was used to this is my old charger (especially the sudden drop to 1/2 tank). i just don't remember the 968 being quite this erratic.



how does yours behave?

Partial Post: Please Login or Register to read the full post.

[94SilverCab]

The one thing you didn't note is that even if gas is pouring out the spout, it NEVER reads "Full", always about 1/16th down from the mark.



MHO,



Jay

Partial Post: Please Login or Register to read the full post.

[flash]

not true. mine reads full just fine. it didn't always do that though. i had to recalibrate it when i had the cluster out. before anybody goes "aha!", no, that is not the problem. it did this before i recalibrated the gauge.

Partial Post: Please Login or Register to read the full post.

[ds968]

Same here ( somewaht..) in fact right up to the 1/2 tank mark it seems to be getting 40mpg, but then for the bottom half of the tank the gauge moves like I'm driving a 4000 lbs Olds with a 455 and two 4 brl Holly carbs sucking the gas..

Partial Post: Please Login or Register to read the full post.

[flash]

hmmm - what about the left and right thing?

Partial Post: Please Login or Register to read the full post.

[DaveN]

I have never noticed the sway level change in my car, I have in other vehicles, it all depends on the orientation of the float, baffles and hysteresis of the fuel circuit. Coming home from Paso I filled up many times and my gauge was fairly linear from full to 1/4.

Partial Post: Please Login or Register to read the full post.

[flash]

yeah - i think i may have buggered a baffle or something in the tank.

Partial Post: Please Login or Register to read the full post.

[fleetwood]

Mine's never read Full either.

Have noticed the sloshing effect sometimes but not always.

On most cars i've I had or driven -- per the fuel gauges, they all appeared to be sipping gas from full to 1/2 full, and as if the tank sprung a leak from 1/2 to empty

(varied makes too -- honda, gm, bmw, porsche).

Partial Post: Please Login or Register to read the full post.

[flash]

i'm not particularly worried about it. i just don't remember it being like this. it seems like it's stuck until i get well over 100 miles on the tank. i may just change it to see if it gets better.



most every car will respond to tilting. it depends on the float arm orientation.



as an example of this though, my denali reads very differently, depending on whether it is parked uphill in the driveway, or down.

Partial Post: Please Login or Register to read the full post.

[blau]

I've found that giving the top of the dash over my instrument cluster a good whack tends to make my gas gauge start working properly the few times it's acted up <img src="/forum/images/smilies/968/biggrin.png" class="smilie" alt="" />

Partial Post: Please Login or Register to read the full post.

[flash]

works on the dog too

Partial Post: Please Login or Register to read the full post.

[rxter]

I get the "not quite full" symptom as well. Once I filled while the car was still on (I know not a good idea but the SO was in the car and she was hot so the AC stayed on during refueling) and I noticed that the needle responded extraordinarily slowly - it took a good 5 minutes after I left the station for hte thing to read "not quite full". Weird.



I have also noticed how exaggerated the gauge markings are not linear. The space between 4/4 and 3/4 is huge compared to the space between 1/4 and R. So the Porsche folks also recognized that their measurement was wonky and they calibrated the gauge face to the tank meter. Frankly I don't trust the thing and I hit the reset button at every fill and refill around 320 or so.

Partial Post: Please Login or Register to read the full post.

[Langley968]

My fuel gauge also does not show FULL after I fill. It does drop in a progressive manner once the fuel has dropped to where the needle was reading when I fill up.

On the trip to Paso recently, I was able to get over 450 miles on a tank! I had not expected that, since with the stop & go driving around town, it is nowhere near that.

Partial Post: Please Login or Register to read the full post.

[tamathumper]

Mine shows full when it's full. Sometimes, and I haven't determined exactly why, it will drop from just below 1/2 to just above 1/4, but then go back *up* to about 3/8 a few minutes later?! If I'm on the highway it seems to be perfectly linear, but once or twice during stop-and-go or cornering driving, it has done the "bump down then back up" thing. I chalked it up to the gauge doing "averaging" on the tank level, but I don't know.

Partial Post: Please Login or Register to read the full post.

[ryker]

On my silver car, the gauge would not show full. On both the green and blue cars, the fuel gauges jump all over the place. Fortunately, I can tell how much fuel is in the tank because the needle keeps coming to a common spot, that gets lower as I drive, strangely. Funny that 50% of the 968's that I own have this identical problem. I really do not feel like pulling ANOTHER cluster, let alone two, in order to have a gauge repaired at North Hollywood Speedometer. Any chance this is the sending unit? I did read in other posts that it could be electrical, although both cars do not exhibit any other electrical gremlins. And, of course, may be the gauge, which I do not have a problem with but I don't want to pay $100 for them to "check it out".

Partial Post: Please Login or Register to read the full post.

[Bulti]

Mine has the same "never full" syndrome. Is there a DIY to recalibrate the gauge?



Left turns make the gauge go up, rights make it go down. The second half of the tank seems to empty faster, but this is the case with 100% of the cars I owned before, one more than the other, but ALL suffer from the same inconsistency.



As of late my gauge was acting up with all kinds of strange behavior. I pulled the sender out, cleaned the inner surface of the tube with a rag (some kind of a "hase" was removed where the metal thingy touches the tube).



Don't know if it was plain luck or maybe I did something good without knowing it, but it never acted up since then.



I believe I took a picture of the metal thing, if there's some interest, I'll post it here.

Partial Post: Please Login or Register to read the full post.

[Rap]

The gauge on my red car won't show full either. You need to gauge your usage at the track after two runs to see how much gas you are using. Sometimes it's holy crap how did I use so much gas that session. Then if you wait the gauge settles to its proper setting. Certainly the second half of the gauge bears more watching but many vehicles exhibit this behavior.

Partial Post: Please Login or Register to read the full post.

[gbarrier]

My needle touches the full mark when topped off. Drive 100 miles and it reads 3/4. Drive on to 200 miles and it reads 1/2. Drive on to 300 miles and it reads 1/4. Gets to empty at about 400 miles. takes about 18 gallons to top it up.



I'm OK with the needle not going past the full mark on my own ride. It's just that occasional rental that I get where this happens (recently a Chevy Spark) that pisses me off.

Partial Post: Please Login or Register to read the full post.

[ryker]

Bulti, it's certainly worth trying your fix. Would you mind posting photo? Thanks

Partial Post: Please Login or Register to read the full post.

[JWahlsten]

Have you guys having the issue checked your voltage? All the 944 series cars do this as the voltage regulator fails and/or the grounds are less effective.

Partial Post: Please Login or Register to read the full post.