67-72 Chevy Truck fuel gauge diagnostics 101 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jjzepplin · 11-08-2014, 02:15 PM

OK so I go after this mutha with a vengeance and tested the new sender with my old gauge and boom she works fine. Drop the empty tank and pull the old unit. Then it hits me-new one does not have a pickup for the fuel! Sumbugger! So I modify the old pickup to use the new sender. Took a pencil torch and soldered it on. Tested and boom still working good. Then it hits me-again this whole apparatus needs to fit thru a small arse hole. Aint happenin the way I have it. So rebend the pickup and float and bend this and that and finally it goes in. I think It works as I put 2.5 gallons from a can in it and the needle moved up. I think It may register full for a couple gallons before it registers any movement but it will tell me when it's empty. Full should be at 30 gallons.

**TBONE1964** · 11-08-2014, 02:23 PM

Quote:

Originally Posted by jjzepplin

OK so I go after this mutha with a vengeance and tested the new sender with my old gauge and boom she works fine. Drop the empty tank and pull the old unit. Then it hits me-new one does not have a pickup for the fuel! Sumbugger! So I modify the old pickup to use the new sender. Took a pencil torch and soldered it on. Tested and boom still working good. Then it hits me-again this whole apparatus needs to fit thru a small arse hole. Aint happenin the way I have it. So rebend the pickup and float and bend this and that and finally it goes in. I think It works as I put 2.5 gallons from a can in it and the needle moved up. I think It may register full for a couple gallons before it registers any movement but it will tell me when it's empty. Full should be at 30 gallons.

Sounds like you got it. I will be curious to know how it works when you fill it and as it runs back down to empty.

Good work JJ,

Take care,
Tom

wayno · 11-11-2014, 11:15 AM

fantastic write-up TBone.. now if I can get you to do a similar write up for TACHs lol

jjzepplin · 11-11-2014, 12:27 PM

Oh yeah! I'm in for that too!

**TBONE1964** · 11-14-2014, 03:04 PM

I am slowly working on getting the tools together to help me diagnose the factory tachs and figure out a way to repair them. I can currently fine tune the calibration and check function but no repair yet.

I have heard about some aftermarket kits that replace all of the insides to a modern style tachometer but allow the tach to look original.

I am always looking for ways to help people out with these things but limited to what I can invest.

I will always keep everyone updated with new developements.

Take care and have a good weekend,
Tom

11-08-2014, 02:15 PM	#1
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,546	Re: 67-72 Chevy Truck fuel gauge diagnostics 101 OK so I go after this mutha with a vengeance and tested the new sender with my old gauge and boom she works fine. Drop the empty tank and pull the old unit. Then it hits me-new one does not have a pickup for the fuel! Sumbugger! So I modify the old pickup to use the new sender. Took a pencil torch and soldered it on. Tested and boom still working good. Then it hits me-again this whole apparatus needs to fit thru a small arse hole. Aint happenin the way I have it. So rebend the pickup and float and bend this and that and finally it goes in. I think It works as I put 2.5 gallons from a can in it and the needle moved up. I think It may register full for a couple gallons before it registers any movement but it will tell me when it's empty. Full should be at 30 gallons. __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

11-11-2014, 11:15 AM	#3
wayno Registered User Join Date: Dec 2012 Location: Woolwich Twp, NJ Posts: 445	Re: 67-72 Chevy Truck fuel gauge diagnostics 101 fantastic write-up TBone.. now if I can get you to do a similar write up for TACHs lol __________________ 64 Step Side - The Mistress

11-11-2014, 12:27 PM	#4
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,546	Re: 67-72 Chevy Truck fuel gauge diagnostics 101 Oh yeah! I'm in for that too! __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

11-14-2014, 03:04 PM	#5
TBONE1964 Cluster King Join Date: Nov 2012 Location: Junction City, OR Posts: 5,263	Re: 67-72 Chevy Truck fuel gauge diagnostics 101 I am slowly working on getting the tools together to help me diagnose the factory tachs and figure out a way to repair them. I can currently fine tune the calibration and check function but no repair yet. I have heard about some aftermarket kits that replace all of the insides to a modern style tachometer but allow the tach to look original. I am always looking for ways to help people out with these things but limited to what I can invest. I will always keep everyone updated with new developements. Take care and have a good weekend, Tom __________________ Contact me on all of your gauge cluster needs. I specialize in restoration, repair and parts sales for 67-72 Chevy and GMC trucks. email me at tbonegarris@yahoo.com I am also a dealer for Counterpart for gauge cluster parts only. Also see my facebook page, CG&C



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