Gas Cap P/N
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Do you have evaporative emission control? That's the charcoal canister in the engine compartment.
The difference between with and without is if you have the evap system, the fuel cap is non-vented. Without evap the cap is vented.
The difference between with and without is if you have the evap system, the fuel cap is non-vented. Without evap the cap is vented.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
You believe? Do you want the correct fuel cap or not? The fuel caps with Evap/Em do not interchange without Evap/Em.
"Coffee can" is a vacuum reservoir, located on left (drivers) side inner fender apron (if so equipped).
1970/77: Evap/Em steel charcoal cannister is round, mounted on the right (passenger) side inner frame rail, either below the alternator, slightly in front of it, or in front of the engine crossmember.
1978/79: Same possible locations, but the cannister is rectangular and plastic.
"Coffee can" is a vacuum reservoir, located on left (drivers) side inner fender apron (if so equipped).
1970/77: Evap/Em steel charcoal cannister is round, mounted on the right (passenger) side inner frame rail, either below the alternator, slightly in front of it, or in front of the engine crossmember.
1978/79: Same possible locations, but the cannister is rectangular and plastic.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Are you SURE both caps are the correct ones? The parts catalog doesn't list a different number for the aft and mid tanks.
Here's what the catalog lists:
Cap assy, fuel tank filler
Fits:
77 F150-350 w/o evaporative emissions
non-locking
2 5/8" OD, vented, handle on top of cap, zinc plate finish.
use w/ aft axle and/or midship tank
D7TZ-9030-H replaced by D8TZ-9030-A, Motorcraft FC-931
Perogie Enterprises, Highstown, NJ has 1 of the D7TZ caps (609) 448-5593
These have the D8TZ cap:
Haven Ford, Haven, KS has 1 (620) 465-2252
Tison Motor Co., Estill, SC has 1 (803) 625-2551
Wesley Obsolete Parts, Liberty, KY has 1 (606) 787-5293
Antique Auto Supply, Arlington, TX has 1 (817) 275-2381
Here's what the catalog lists:
Cap assy, fuel tank filler
Fits:
77 F150-350 w/o evaporative emissions
non-locking
2 5/8" OD, vented, handle on top of cap, zinc plate finish.
use w/ aft axle and/or midship tank
D7TZ-9030-H replaced by D8TZ-9030-A, Motorcraft FC-931
Perogie Enterprises, Highstown, NJ has 1 of the D7TZ caps (609) 448-5593
These have the D8TZ cap:
Haven Ford, Haven, KS has 1 (620) 465-2252
Tison Motor Co., Estill, SC has 1 (803) 625-2551
Wesley Obsolete Parts, Liberty, KY has 1 (606) 787-5293
Antique Auto Supply, Arlington, TX has 1 (817) 275-2381
Trending Topics
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
What bothers me is OP's "late 1977" jazz (Is it really an early 1978? What is the VIN?) and 'saddle tank' whiz bang.
1977/79 Stylesides have fuel doors, but if mid-ship tank not installed, open fuel door-nothing is there.
But aftermarket fuel tanks could have been installed on the left and right sides, as that's what 'saddle tanks' refers to.
------------------------------------------------------------------------------------------------------------------
D8TZ-9030-B (replaced D7TZ-9030-D) .. 'Single' Locking Fuel Cap w/2 keys / Use on Mid-Ship and/or Aft Axle Fuel Tank (Motorcraft FC-805) / Obsolete
Applications: 1977/78 F100/350 without Evaporative Emission.
NOS PARTS LTD in Waxahachie TX has ONE = 972-937-2201.
CARPENTER NOS OBSOLETE PARTS in Concord NC has ONE = 800-476-9653.
------------------------------------------------------------------------
D7TZ-9030-D =
KINSEL L/M in Beaumont TX has ONE = 800-816-2894.
NOS PARTS SOURCE in Olathe KS has ONE = 913-220-5746.
With factory installed mid-ship and aft axle tanks, FoMoCo offered fuel cap kits that contained two caps and 4 common keys.
1977/79 Stylesides have fuel doors, but if mid-ship tank not installed, open fuel door-nothing is there.
But aftermarket fuel tanks could have been installed on the left and right sides, as that's what 'saddle tanks' refers to.
------------------------------------------------------------------------------------------------------------------
D8TZ-9030-B (replaced D7TZ-9030-D) .. 'Single' Locking Fuel Cap w/2 keys / Use on Mid-Ship and/or Aft Axle Fuel Tank (Motorcraft FC-805) / Obsolete
Applications: 1977/78 F100/350 without Evaporative Emission.
NOS PARTS LTD in Waxahachie TX has ONE = 972-937-2201.
CARPENTER NOS OBSOLETE PARTS in Concord NC has ONE = 800-476-9653.
------------------------------------------------------------------------
D7TZ-9030-D =
KINSEL L/M in Beaumont TX has ONE = 800-816-2894.
NOS PARTS SOURCE in Olathe KS has ONE = 913-220-5746.
With factory installed mid-ship and aft axle tanks, FoMoCo offered fuel cap kits that contained two caps and 4 common keys.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Thread Starter
|
Freshman User
Joined: Feb 2013
Posts: 25
Likes: 0
Thanks for the feedback. This is the same problem I'm having at NAPA/etc. There is only one listed cap.
Last 5 of the VIN are 44164, truck is titled as a 77.
Both tanks were installed and to the best of my knowledge are factory tanks. The mid ship tank's gas cap is the one listed below by Mike.
The aft tank needs a different cap and appears to be a factory installed tank. The diameter is fine but the 'arms' on the cap need to be taller.
Thanks
Last 5 of the VIN are 44164, truck is titled as a 77.
Both tanks were installed and to the best of my knowledge are factory tanks. The mid ship tank's gas cap is the one listed below by Mike.
The aft tank needs a different cap and appears to be a factory installed tank. The diameter is fine but the 'arms' on the cap need to be taller.
Thanks
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
It sounds like you may have a cap for a tank WITH evap emissions. I don't have the physical data but I know that the locking tabs between the two were different. The cap w/ evap emissons was non-vented, w/o evap was vented.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
As I recall, Evap/Em cap is not only non vented, but has 4 narrow prongs, two above, 2 below 180 degrees apart.
Evap/Em: Unleaded fuel, restrictors in filler necks, served two purposes. Lower prongs of cap twisted into restrictors.
Back then, there were two sizes of gas station nozzles. Restrictors designed so larger in diameter leaded gas nozzles wouldn't fit.
But unleaded was more expensive than leaded regular, so some peeps knocked out the restrictors so they could use leaded gas.
Peeps unaware that leaded gas melted the charcoal inside cat converters shoving it into muffler. Vehicles soon sounded like vacuum cleaners headin' on down the road.
Wasn't too long before they died alongside the road, muffler plugged up solid.
OP: Look at aft axle tank adjacent to sending unit for round hole that contains the Evap/Em fuel vapor valve.
Cannister, vapor lines, restrictor may have gone bye bye, but valve may still be present w/nipple capped off.
Evap/Em: Unleaded fuel, restrictors in filler necks, served two purposes. Lower prongs of cap twisted into restrictors.
Back then, there were two sizes of gas station nozzles. Restrictors designed so larger in diameter leaded gas nozzles wouldn't fit.
But unleaded was more expensive than leaded regular, so some peeps knocked out the restrictors so they could use leaded gas.
Peeps unaware that leaded gas melted the charcoal inside cat converters shoving it into muffler. Vehicles soon sounded like vacuum cleaners headin' on down the road.Wasn't too long before they died alongside the road, muffler plugged up solid.
OP: Look at aft axle tank adjacent to sending unit for round hole that contains the Evap/Em fuel vapor valve.
Cannister, vapor lines, restrictor may have gone bye bye, but valve may still be present w/nipple capped off.
Thread Starter
|
Freshman User
Joined: Feb 2013
Posts: 25
Likes: 0
Truck has filler neck set up for UNleaded. There is no evap hole on the tank.
If yes, what year cap do I order from the knucklehead at NAPA who doesn't know how to do anything but read the computer screen even though they have a rack of books in the back that nobody knows how to read....
Thanks
If yes, what year cap do I order from the knucklehead at NAPA who doesn't know how to do anything but read the computer screen even though they have a rack of books in the back that nobody knows how to read....
Thanks
More Turbo
Joined: Nov 2006
Posts: 538
Likes: 11
From: Great N/W
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Here's my build thread https://www.ford-trucks.com/forums/8...with-pics.html
This is what the canister looked like before I cleaned it up
Okay, hijack over
