Gas gauge reads full all the time

 
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CzyKats44Offline
Back Seat Driver
Total posts: 16

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Greg U.
1999 Grand Prix GT
Joined: 03 Oct 2009
Location: Glenville, NY
PostPosted: Thu Apr 08, 2010 5:23 pm    Post subject: Gas gauge reads full all the time Reply with quote

Filled up the other day and 120 miles later ... still reading full. I hit a few larger bumps on purpose to see if the float would unstick ... Inconclusive. I'm planning on dropping the tank and seeing whats up with the float and mutlimetering the wiring. I dont think its wiring because if it was not getting power the gauges detent is empty (like when you shut the car off). Sound familiar to anyone? Thanks
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gpkid16Offline
Intercooled
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Chris Battaglia
2000 Grand Prix GTP
Joined: 14 Aug 2005
Location: Syracuse/Buffalo
Age: 35
PostPosted: Thu Apr 08, 2010 6:50 pm    Post subject: Reply with quote

Have you been in the dash lately to put overlays in or anything? I'm sure you would have thought of that if you did, but figured I would throw it out there.

I would guess it's something electrical related. Here is a pretty good article with a few possible causes.

http://www.chevytrucks.org/tech/gasgauge.htm
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loudgpOffline
Intercooled
Total posts: 593

Greg
1996 Grand Prix GT
Joined: 03 May 2006
Location: Ny
Age: 43
PostPosted: Thu Apr 08, 2010 7:27 pm    Post subject: Reply with quote

No need to drop the tank, access is via the trunk.... if you need a diagram email me Gregguido80@gmail.com i can send one...
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mguzzoOffline
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Michael Guzzo
1998 Grand Prix GTP
Joined: 03 Oct 2003
Location: in front of you
Age: 57
PostPosted: Fri Apr 09, 2010 11:19 am    Post subject: Reply with quote

you don't need to drop the tank. go thru the access panel in the trunk. it's accessible through the rear seat pass-thru. remove the trunk carpet so you don't generate any static. Once you pull the panel off, clean off all the dirt and disconnect the connectors. Undo the snap ring and lift the pump out. The canister will still be full of fuel so be sure you are grounded and don't spill any!!! Then you can check the float.
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1998 Silvermist GTP Coupe
Bone stock unicorn
1998 True Green Metallic GTP Coupe
Pullied, cammed, intercooled. With a kiddie seat. It once ran a 13 flat.
1998 True Green Metallic GTP Sedan (retired)
Stock: 14.33 @ 96.5
PB: 13.89 @ 101 mph
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CzyKats44Offline
Back Seat Driver
Total posts: 16

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Greg U.
1999 Grand Prix GT
Joined: 03 Oct 2009
Location: Glenville, NY
PostPosted: Sat Apr 10, 2010 4:50 pm    Post subject: Reply with quote

I pulled it out to inspect. All seemed well, I pushed the contacts in a little and cleaned the shit out of the connectors. All better! Thanks for heads up on the inspection cover I would have never known it was there!!

Thanks Fellas!
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loudgpOffline
Intercooled
Total posts: 593

Greg
1996 Grand Prix GT
Joined: 03 May 2006
Location: Ny
Age: 43
PostPosted: Sun Apr 11, 2010 7:27 pm    Post subject: Reply with quote

Good to hear, I have n extra float assembly if you need one...

Mike,,, Any word on those parts? i was sick the last week and a half... got hit hard...
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mguzzoOffline
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Michael Guzzo
1998 Grand Prix GTP
Joined: 03 Oct 2003
Location: in front of you
Age: 57
PostPosted: Sun Apr 11, 2010 9:01 pm    Post subject: Reply with quote

yeah I have the TB with MAF. I can't figure out how to get the ign cylinder out. any tips
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loudgpOffline
Intercooled
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Greg
1996 Grand Prix GT
Joined: 03 May 2006
Location: Ny
Age: 43
PostPosted: Mon Apr 12, 2010 8:50 pm    Post subject: Reply with quote

Tips~ Yea I'll pull it..... shoot me a text with when and $$ thanks man..
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