Why Do Single-Tank Trucks Need A Tank Switch?

classic Classic list List threaded Threaded
6 messages Options
Reply | Threaded
Open this post in threaded view
|

Why Do Single-Tank Trucks Need A Tank Switch?

Gary Lewis
Administrator
I found something in the catalog today that has me puzzled, so perhaps y'all can explain it to me.

As you can see below, the catalog says that 1980 - 86 trucks with a "single fuel system" take tank selector switch D5TZ 9A050-A, which is marked D5TB 9A050-AA and has 5 terminals.  I just so happen to have one of those rascals and can tell you that it takes a different connector than all of the other tank selector switches, which have a 6-pin layout.  (By the way, I have a page up that shows the various switches used on these trucks: Fuel Systems/Fuel System Wiring.)

I've gone to the EVTM's and am now even more confused.  The 1981, 1884, and 1984 EVTM's show a 5-pin terminal that can only fit the D5TZ 9A050-A, and it isn't until the 1986 EVTM that the 6-pin layout appears. However, the catalog shows that a 6-pin format was used as early as '83.

But none of the EVTM's show a switch on single-tank trucks, only show a switch for trucks with dual tanks.

What am I missing?  Why do trucks with only one tank need a switch?  And, did they have one?  Any of y'all have a single-tank truck?  Does it have a switch?

Or, does "single fuel system" mean that they only run on a single fuel and not, say, gasoline and LPG?









Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Reply | Threaded
Open this post in threaded view
|

Re: Why Do Single-Tank Trucks Need A Tank Switch?

85lebaront2
Administrator
Very likely, Ford and and Chrysler were all offering LP gas options for trucks. We had a father in our scout troop who would loan us a GMC pickup with the 305 V6 and 4 speed Hydra-Matic that ran on LP gas.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

Reply | Threaded
Open this post in threaded view
|

Re: Why Do Single-Tank Trucks Need A Tank Switch?

reamer
No tank switch on my single-tank flareside...
1986 F-150 Flareside 4x4, 351, 4-v, ZF5 speed. AC, Cruise, Tilt, Slider, Digital clock, Radio, Lariat seat, Pwr doors/locks
Reply | Threaded
Open this post in threaded view
|

Re: Why Do Single-Tank Trucks Need A Tank Switch?

FuzzFace2
reamer wrote
No tank switch on my single-tank flareside...
Same here on my 81 F100 single-tank flare side.............till I added the 2nd rear tank
Dave ----
Dave G.
81 F100 flare side 300 six / AA OD / NP435 / 2.75 gear
http://cars.grantskingdom1.com/index.php/1980-Ford-F100?page=1
81 F100 style side 300 six/SROD parts truck -RIP
http://cars.grantskingdom1.com/index.php/1981-Ford-F100
Reply | Threaded
Open this post in threaded view
|

Re: Why Do Single-Tank Trucks Need A Tank Switch?

Gary Lewis
Administrator
I think "single fuel" must not mean "tank" and instead means it wasn't set up for more than one fuel.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Reply | Threaded
Open this post in threaded view
|

Re: Why Do Single-Tank Trucks Need A Tank Switch?

Dyn Blin
In reply to this post by FuzzFace2
Hey Fuzz, do you have a write up on your 2nd tank addition somewhere?  

Thanks
Sonoma County,CA
1982 F150 Flareside XLS
NP435 4x4
351W Motorcraft 2150