Another fuel gauge problem! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nosto · 09-01-2002, 01:50 PM

I just looked through past threads about fuel gauge problems and didn't find an answer to this one, so here goes...

I'm about halfway through rewireing the C-10 with the Painless kit. No problems, so far. Except I wanted to check all the dash gauges before I put it back in.

Took fuel gauge out of bezel, went to back of truck, attached it directly to the sender from the poly Blazer tank, grounded the faceplate of gauge and sender to ground on battery. Applied B+ to gauge. Pointer swung over to about 4 o'clock (waayy past full!). Took out sender, moved float from bottom to top and pointer only moved about 1/2".

Sender shows 0 ohms with float at bottom, around 100 ohms at top.

One last thing....C-10 was originally a 6, had original tank in cab. PO replaced 6 with 350. Later, I added the poly tank.

Is there a difference between a 6cyl sender and an 8cyl one?

Anyone have a suggestion?

Thanks,

bigvinnie · 09-01-2002, 03:31 PM

did a 6 to smallblock swap and had no problems with the guage. Your ohm readings sound correct, might wanna check it with another fuel guage if you have one laying around.

Also, that 4 oclock positiion is what you get when the sender wire isn't hooked up, so might wanna play with that as well....

nosto · 09-01-2002, 07:35 PM

Just swapped the connections on the back of the gauge and it worked right. I didn't know the gauge cared which terminal had +12 and which had the sender, I do now!

09-01-2002, 01:50 PM	#1
nosto Flamin' Bass Join Date: Aug 2001 Location: Galloway, NJ, US Posts: 315	Another fuel gauge problem! I just looked through past threads about fuel gauge problems and didn't find an answer to this one, so here goes... I'm about halfway through rewireing the C-10 with the Painless kit. No problems, so far. Except I wanted to check all the dash gauges before I put it back in. Took fuel gauge out of bezel, went to back of truck, attached it directly to the sender from the poly Blazer tank, grounded the faceplate of gauge and sender to ground on battery. Applied B+ to gauge. Pointer swung over to about 4 o'clock (waayy past full!). Took out sender, moved float from bottom to top and pointer only moved about 1/2". Sender shows 0 ohms with float at bottom, around 100 ohms at top. One last thing....C-10 was originally a 6, had original tank in cab. PO replaced 6 with 350. Later, I added the poly tank. Is there a difference between a 6cyl sender and an 8cyl one? Anyone have a suggestion? Thanks, __________________ Rick Olson /nosto/ Galloway, NJ Pics : http://community.webshots.com/user/nosto53 1972 Triumph TR6 - full resto, now with a Toyota 5-speed 1975 F**D F-100 - rusty, but reliable 1982 HD XLH-1000 1967 C-10, shortstep, 350/M21 4spd, nitrogen tank fills fast bags on 4 corners, Toyo 255/45X20s on American Eagle 221 20X8s, shaved locks and handles, antenna, fuel filler, tiny C-notch, rear fuel tank, long headers, Edelbrock, worn 600 Holley, Checkmate flush hard cover, rear pan, custom LED taillights - painted it, too! But don't like it so I'm gonna do it again!!

09-01-2002, 03:31 PM	#2
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	did a 6 to smallblock swap and had no problems with the guage. Your ohm readings sound correct, might wanna check it with another fuel guage if you have one laying around. Also, that 4 oclock positiion is what you get when the sender wire isn't hooked up, so might wanna play with that as well.... __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

09-01-2002, 07:35 PM	#3
nosto Flamin' Bass Join Date: Aug 2001 Location: Galloway, NJ, US Posts: 315	Just swapped the connections on the back of the gauge and it worked right. I didn't know the gauge cared which terminal had +12 and which had the sender, I do now! __________________ Rick Olson /nosto/ Galloway, NJ Pics : http://community.webshots.com/user/nosto53 1972 Triumph TR6 - full resto, now with a Toyota 5-speed 1975 F**D F-100 - rusty, but reliable 1982 HD XLH-1000 1967 C-10, shortstep, 350/M21 4spd, nitrogen tank fills fast bags on 4 corners, Toyo 255/45X20s on American Eagle 221 20X8s, shaved locks and handles, antenna, fuel filler, tiny C-notch, rear fuel tank, long headers, Edelbrock, worn 600 Holley, Checkmate flush hard cover, rear pan, custom LED taillights - painted it, too! But don't like it so I'm gonna do it again!!



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