FZJ75 Fuel line identification help....please!

[ranchero7]

Hey - I'm trying to figure out the fuel line connections to the three hard lines that go back to the tank. Mine came with an aftermarket Holley fuel injection and I'm going back to stock carb. This is a 95 FZJ75 LHD. I can't find it in the service manual.

There are three hard lines mounted to the frame just below the PS reservoir: The middle line is larger and goes from the tank pickup to the fuel filter and then to the carb (I think). The front line looks like it is the return line as it appears to go up next to the top of the tank along with the fuel pick up line. The rear line goes back to the tank and runs along the front edge of the tank until it tees and one part goes up and the other to the passenger side.

Any assist? Thanks
Steve

 

[DrRock]

Hello Steve, I have a 1992 FZJ75 Ute with 1FZ-F LHD single fuel tank which is bone stock. I'm just about to head out for the weekend but when I return on Sunday I can get whatever pictures you need.

In the meantime, let me know if there are any more specifics you need. I have to do some exploration myself as I have a vacuum in my fuel tank I need to diagnose.

Cheers, James

 

[ranchero7]

Hello Steve, I have a 1992 FZJ75 Ute with 1FZ-F LHD single fuel tank which is bone stock. I'm just about to head out for the weekend but when I return on Sunday I can get whatever pictures you need.

In the meantime, let me know if there are any more specifics you need. I have to do some exploration myself as I have a vacuum in my fuel tank I need to diagnose.

Cheers, James

Thanks, James!

 

[DrRock]

Thanks, James!

Hello Steve, Here are the photos from my truck. High level overview is there are three lines that come from the tank, supply, return and one other, probably the vent but I’ll confirm once I’ve studied the schematics. These lines come out of the tank and along the LH frame rail as hard lines. They then come up out of a manifold block mounted to the frame rail and go to the fuel pump, then into the carburetor. I’ve put the pictures below in order from the tank, to the carb. Let me know if you need anything else and if you find a plumbing schematic in your travels too.

From tank to Hardlines on the LH frame rail:

Hard lines going from tank to manifold.

Manifold location from above

Routing from fuel pump and charcoal cannister down to manifold.

Fuel pump lines to factory carburetor.

 

[ranchero7]

Hello Steve, Here are the photos from my truck. High level overview is there are three lines that come from the tank, supply, return and one other, probably the vent but I’ll confirm once I’ve studied the schematics. These lines come out of the tank and along the LH frame rail as hard lines. They then come up out of a manifold block mounted to the frame rail and go to the fuel pump, then into the carburetor. I’ve put the pictures below in order from the tank, to the carb. Let me know if you need anything else and if you find a plumbing schematic in your travels too.

From tank to Hardlines on the LF frame rail:

snip, snip

Thank you, James! That was super helpful! I may ask for some vacuum line assistance, but I got it started!

 

[Sethro60]

Did you have a Holley sniper setup on there?I just jot a 98 from the UAE and Texas and it seems to be having some problems altitude (8000 ft) Thought the Sniper setup might be a solution.

 

[DrRock]

I’ve been curious about a possible swap to a Sniper at some point too. I did the swap on my 60 and it has been fantastic. Very reliable and no struggles with the truck from sea level all the way up to 13k feet. My 75 runs really well now so I don’t want to try to solve a problem that doesn’t exist but with parts becoming more scarce ( charcoal canister for the 75 is NLA) the swap seems to be more a topic of when, not if.

 

[OGBeno]

I’ve been curious about a possible swap to a Sniper at some point too. I did the swap on my 60 and it has been fantastic. Very reliable and no struggles with the truck from sea level all the way up to 13k feet. My 75 runs really well now so I don’t want to try to solve a problem that doesn’t exist but with parts becoming more scarce ( charcoal canister for the 75 is NLA) the swap seems to be more a topic of when, not if.

You can use the charcoal canister from a later FZJ7x and it will work with some slight adjustments.

 

[DrRock]

You can use the charcoal canister from a later FZJ7x and it will work with some slight adjustments.

Super, thanks for the pro tip, much appreciated.

 

[ranchero7]

Did you have a Holley sniper setup on there?I just jot a 98 from the UAE and Texas and it seems to be having some problems altitude (8000 ft) Thought the Sniper setup might be a solution.

I'll be selling the Sniper. I live at 7000 feet, but barely drove it up here because I had rod knock. The replacement motor with a carb runs a lot better than the Sniper did, and I haven't even tuned the carb for altitude yet. Carb and engine was on a car at about sea level. I love fuel injection, but I kind of like the idea of no computer and limited electronics.

 

[JuanJ]

Did you have a Holley sniper setup on there?I just jot a 98 from the UAE and Texas and it seems to be having some problems altitude (8000 ft) Thought the Sniper setup might be a solution.

Hello,

Your carburetor needs a tune up.

If possible, add an altitude compensator.

After tuning, idle speed at altitude can be around 800 rpm.





Juan

 

[ranchero7]

Hello,

Your carburetor needs a tune up.

If possible, add an altitude compensator.

After tuning, idle speed at altitude can be around 800 rpm.





Juan

Juan - can you take some pictures of the connections for the altitude compensator to the carb? I found one for my 1FZ-F, but I'm unclear of the connections on that, the purge canister to the gas tank and the purge canister for the carb.

 

[JuanJ]

Juan - can you take some pictures of the connections for the altitude compensator to the carb? I found one to my 1FZ-F, , but I'm unclear of the connections of that, the purge canister to the gas tank and the purge canister for the carb.

Hello,

This is what I have.

Note that the altitude compensator (in red and black) is in the bottom.

Another image, from above.

And another view from the front.

Hope this helps.







Juan

 

[ranchero7]

Hello,

This is what I have.

View attachment 4055127

Note that the altitude compensator (in red and black) is in the bottom.

Another image, from above.

View attachment 4055130

And another view from the front.

View attachment 4055132

Hope this helps.







Juan

Thanks, Juan. That is a great help! It seems like there are different ways to hook the HAC up. Most I've seen plug the ports on the right and the left.

 

[OGBeno]

Juan - can you take some pictures of the connections for the altitude compensator to the carb? I found one for my 1FZ-F, but I'm unclear of the connections on that, the purge canister to the gas tank and the purge canister for the carb.

You really should get the manual for your truck. It’s has all of the vacuum routing and information about your carb and your fuel tank system.

Engine Manual:



Chassis Manual Supplement:

1992 FSM.pdf | Powered by Box

app.box.com

Chassis/Body Manual:

 

[JuanJ]

Thanks, Juan. That is a great help! It seems like there are different ways to hook the HAC up. Most I've seen plug the ports on the right and the left.

Hello,

Depending on emissions requirements, there were different setups.

Some General Market trucks had a hot air circulation system and what Toyota calls a "thermostatic valve" in the air filter housing. These features were connected to the carburetor's vacuum lines.

Middle East and Colombia spec trucks had a simpler setup, without hot air circulation and valve.

Different setups imply different ways to connect the compensator to the carburetor.

The pictures are from a truck with hot air circulation and valve setup.





Juan

 

[JuanJ]

You really should get the manual for your truck. It’s has all of the vacuum routing and information about your carb and your fuel tank system.

Hello,

x2.

The engine manual has an entire section devoted to the carburetor and its vacuum lines.

In my humble opinion, the 1FZ carburetor it is a bit more complicated than its 2F counterpart.

Hint: the chassis manual has the fuel tank lines setup details.







Juan

 

[ranchero7]

You really should get the manual for your truck. It’s has all of the vacuum routing and information about your carb and your fuel tank system.

Thank you for loading those Beno. I have poured over the manuals and cannot find any vacuum diagram or the emissions diagrams.

 

[OGBeno]

Thank you for loading those Beno. I have poured over the manuals and cannot find any vacuum diagram or the emissions diagrams.

Have you checked your hood? Should be a vacuum diagram under the hood.

Otherwise you need ERM086E.

Or you can try Toyota Australia tech info and get a 24hr subscription and download the specifics.

Or you can try Toyota Europe tech info and get a 24hr subscription and download the specifics.

 

[DrRock]

Thank you for loading those Beno. I have poured over the manuals and cannot find any vacuum diagram or the emissions diagrams.

Hello Steve, here is a photo of the vacuum line diagram Beno was referring to that should be under the hood. I found this searching one day so thanks to whomever added in the comments where the decal is damaged.