fuel only reads e on both sides - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jon_bursey · 09-13-2012, 09:05 PM

i just got both tanks hung and wired and plumbed in and i can draw on the pass side cant switch to drivers side and fuel guage reads a constant e ??? could i have the fuel lines switched and the switch stuck on drivers side and selector valve be stuck on right side??? GRRRRR

russgt · 09-14-2012, 08:29 PM

Are both tanks empty? Just kidding, I had to say it

frog210 · 09-14-2012, 08:30 PM

The ground on the sender or the ground behind the cluster

**hatzie** · 09-14-2012, 09:21 PM

There are 2 valve systems in the 73-91 trucks.
What year is your truck?

Reading E means the sender wire is shorted to ground somewhere. I can get more specific once I know what year your rig is.

jon_bursey · 09-15-2012, 11:22 AM

1984 305/700r4/np208 new sending units had the new grounds attached into holes i chased with a tap beforehand. They appear to have seated good. Before i didnt have the tanks sending units actually wired up but now they are and it reads empty or actually 1/8 tank but they both are full dont ask how much 40 gallons cost geezzzz wow

**hatzie** · 09-15-2012, 08:05 PM

Roughly $160 to fill it at my prices... OWCH!!

When you unplug the selector valve plug does the gauge go to roughly 3:00? If it doesn't move then I'd suspect the gauge or flexible printed instrument cluster circuit panel.

The 84 sender wire runs from the selector valve through the main bulkhead plug on the firewall and from there to the instrument cluster plug. Check it over for shorts to ground.

jon_bursey · 09-17-2012, 04:24 AM

i figured it went to the tank switch on the dash first...there i go thinking again

huahuamick · 09-17-2012, 06:17 AM

Valuable thoughts and advices. I read your topic with great interest.

**hatzie** · 09-18-2012, 10:20 PM

Quote:

Originally Posted by jon_bursey

i figured it went to the tank switch on the dash first...there i go thinking again

Nope that's the first generation single wire tank valve. 73-8?
I don't have 81 & 82 wiring diagrams so I'm not sure which year GM changed the valve from Solenoid to Motorized. '83-91 has a motorized valve.

The '84 should have a motorized valve system with a 6 position weatherpak plug. The gauge switch is incorporated into the valve.

jon_bursey · 09-19-2012, 10:48 AM

evidently i didnt have the weatherpac connector snapped shut far enough the clip was snapped on the side of it but it needed another little push to fully seat the pins and amazingly it works i was beginning to doubt my wiring skills. thanks for everyones help here!! now on to the blown transfer case

09-13-2012, 09:05 PM	#1
jon_bursey Registered User Join Date: Feb 2012 Location: des moines, iowa Posts: 22	fuel only reads e on both sides i just got both tanks hung and wired and plumbed in and i can draw on the pass side cant switch to drivers side and fuel guage reads a constant e ??? could i have the fuel lines switched and the switch stuck on drivers side and selector valve be stuck on right side??? GRRRRR

09-14-2012, 08:29 PM	#2
russgt Registered User Join Date: May 2008 Location: Waukesha, WI Posts: 904	Re: fuel only reads e on both sides Are both tanks empty? Just kidding, I had to say it __________________ 70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634

09-14-2012, 08:30 PM	#3
frog210 Registered User Join Date: Mar 2012 Location: San Antonio, Tx Posts: 784	Re: fuel only reads e on both sides The ground on the sender or the ground behind the cluster __________________ San Antonio, TEXAS -Frog -I'm a valet and well I've driven BMWs, Mercedes, Porsche,Bentlys, fiats, Hondas, etc and well even do I like a few features, I love my shortbed, it dosent bore me out, just press on the gas and you'll remember why you love it.

09-14-2012, 09:21 PM	#4
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: fuel only reads e on both sides There are 2 valve systems in the 73-91 trucks. What year is your truck? Reading E means the sender wire is shorted to ground somewhere. I can get more specific once I know what year your rig is. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

09-15-2012, 11:22 AM	#5
jon_bursey Registered User Join Date: Feb 2012 Location: des moines, iowa Posts: 22	Re: fuel only reads e on both sides 1984 305/700r4/np208 new sending units had the new grounds attached into holes i chased with a tap beforehand. They appear to have seated good. Before i didnt have the tanks sending units actually wired up but now they are and it reads empty or actually 1/8 tank but they both are full dont ask how much 40 gallons cost geezzzz wow

09-15-2012, 08:05 PM	#6
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: fuel only reads e on both sides Roughly $160 to fill it at my prices... OWCH!! When you unplug the selector valve plug does the gauge go to roughly 3:00? If it doesn't move then I'd suspect the gauge or flexible printed instrument cluster circuit panel. The 84 sender wire runs from the selector valve through the main bulkhead plug on the firewall and from there to the instrument cluster plug. Check it over for shorts to ground. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

09-17-2012, 04:24 AM	#7
jon_bursey Registered User Join Date: Feb 2012 Location: des moines, iowa Posts: 22	Re: fuel only reads e on both sides i figured it went to the tank switch on the dash first...there i go thinking again

09-17-2012, 06:17 AM	#8
huahuamick Registered User Join Date: Aug 2012 Location: Baltimore, MD Posts: 71	Re: fuel only reads e on both sides Valuable thoughts and advices. I read your topic with great interest.

09-19-2012, 10:48 AM	#10
jon_bursey Registered User Join Date: Feb 2012 Location: des moines, iowa Posts: 22	Re: fuel only reads e on both sides evidently i didnt have the weatherpac connector snapped shut far enough the clip was snapped on the side of it but it needed another little push to fully seat the pins and amazingly it works i was beginning to doubt my wiring skills. thanks for everyones help here!! now on to the blown transfer case

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