Nate, >From what I've learned recently about these systems suggests that you have a 90 ohm sender which was made for the "later" gauges, versus a 30 ohm sender designed to mate with the "earlier" gauges. Mine had a 90 ohm, and with all working properly, a full tank registered as slightly above a half tank on the gauge. The jump up to a full tank suggests a break in the resister wire or gunk on the resistor windings in the sender, temporarily creating an open (=full) connection, making the gauge jump to full, just as if you disconnected the sender side of the gauge. The housing surrounding the resistor winding will be stamped 30 or 90 ohms, so it can be checked. Casey
Nate wrote... > Message: 8 > Date: Wed, 04 Jan 2006 15:21:40 -0000 > From: "vwnate1" <[EMAIL PROTECTED]> > Subject: Re: Stuck Gas Gauge Diagnosis > > > Keep at it and let us know , my gauge moved the other day so I went > to fill it up , it had been at 1/3 tank and it took 9 gallons (about > 1/2 a tank) , the gauge went to full for about 45 minutes then > settled back to slightly over thew 1/2 mark where it seems to be > happiest ... > > -Nate > Tom wrote: > > > > Nate, thanks very much for all the info. I did check the gauge by > taking > > the wire loose from the back of it. It immediately moved > to 'full'. So I > > think the gauge itself it OK. I also added a new ground wire from > the > > sender flange to the frame. Still, the gauge won't move past > empty. I'm > > still checking things that you (Nate), Mike, and Casey > recommended. Got a > > feeling when all's said and done, the sender is bad and will need > to be > > replaced. I sure appreciate all the help, guys! > > Tom Caperton > > '47-2nd Series ... in Whiteville, NC > > [EMAIL PROTECTED] > > > > ----- Original Message ----- > > From: "vwnate1" <[EMAIL PROTECTED]> > > To: <[email protected]> > > Sent: Saturday, December 31, 2005 11:11 PM > > Subject: [old-chevy-truck] Re: Stuck Gas Gauge Diagnosis > > > > > > > > > > Tom ; > > > > > > If the gauge won't go above empty , try disconnecting the higher > > > wire on the back of the gauge ~ if it now reads ' full ' the gauge > > > is fine and the gauge to sender wire has a short in it > somewheres , > > > prolly where it goes through the firewall and a rubber grommet > > > rotted away allowing the harness to chafe or perhaps on one of > those > > > little frame loom clips , they often cause intermittant shorts . > > > > > > If the gauge stays on empty when the sender wire is disconnected > > > from the back of it , the gauge head is bad , I dunno if you can > fix > > > it or not , no harm in trying as it's dead now . > > > > > > -Nate > Ole Chevy and GMC trucks rule! To unsubscribe, send an email (with no subject, no body, just the email), to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/old-chevy-truck/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
