Gas gauge not working any idea?

[Reumster]

Where should I look first?

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1972 2wd Blazer, 350/700R4/3:73 posi/NOS. Power is nothing without control!

[Fast68Chevy]

is it pegged ot the right E or no ? the cause depend son thew symptom when it comes to fuel sender system, if its pegged to right then the tan wire that runs from the fuse panel back to the unit in the tank has lost connection at the panel or at the unit or is broken inside the insulation along the way somewhere.
also the float ball could have fallen off of the float arm

if not pegged ot right then either unit could be bad or the hot source to the gauge from thepanel could have been lost, IE problem in fuse panel or ign switch

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Randy- Lincoln, IL
randy@ccaonline.com
-71/C-10(thx teeitup and crews!)350 4+4/CH465(thx 71Chev, GMCPaul, and CPNE)longfleet bed(thnx meathead95)!still building it-
-'84 Z28 H.O. 305 L69 700R4 GT4 3.73
- 1984 Firebird SE 2.8L T-5 GT4 3.73
-1981 Cutlass Supreme, dunno what im gonna do with it yet...
-79 G20 pass van, 350/th350/10bolt
*Paint is overrated
© RSS Enterprises 2000

[lukecp]

Take out the sending unit in the tank, and hook up a multimeter to it. The sender works on resistence, so put the multimeter on the OMS (or OMHS im not sure, lol) and move the float arm up and down. If moving it up and down changes the resistance, the sending unit is fine. If it dosen't, your sending unit is shot.

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Lucas

"Another proud owner of one of the coolest trucks ever built"

drop_shift@hotmail.com

My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, 300 HP thanks to a few go-fast goodies. Ochre with a white top. Future plans include a frame off restoration, and maybe a blown 383.

[Reumster]

Not about to take the tank down! LOL If I did that I'd have to order a new sending unit while I was at it! It worked before, but i think I did something when I pulled the gauge cluster out of the dash?? What could I have done??

Next question is there a filter on the fuel pickup on the sending unit thingy bobby??

Also how much is a new sending unit? And is there different grades of units? IE Stainless ones?? Also anyone ever put a poly tank in a blazer??

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1972 2wd Blazer, 350/700R4/3:73 posi/NOS. Power is nothing without control!

[lukecp]

I was thinking you had a truck, not a Blazer, lol. There is a little nylon bag around the pickup on the sending unit. The unit costs about $50 for a truck, it may be the same for a Blazer but im not sure.