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How did you depressurize the system?

 

Like a boss.

I disconnected the hose. The left hose at the bottom of the picture. If you want you could pull the fuel pump fuse and let the truck run until it dies.

 

When you used the mr gasket pump how did you power it and about how long did it take empty? I may go buy one from advance auto tomorrow and pump the gas in another vehicle.

 

Here is a link to the fuel system.
Fuel delivery issues 2005 pre runner 4.0L

 

It took about 15-20 minutes. My tank was FULL with about 30 or so miles on it. I powered the pump with an old battery charger. You could use anything as long as it's 12v. The little Mr Gasket pump only draws 2 amps.

 

The plan is to do the removal and install tomorrow. I skimmed through the URD install and was confused on one part. It'll probably all make sense once I see the internal unit. If I have any questions I'll definitely let you know.

 

To me, the hard part is getting your hands up in there to get the lines disconnected. The one by the filler neck was the one that gave me trouble.

You have to squeeze in on both sides of the connector kind of hard then pull the the line off. On my truck they were a little crusty and didn't want to come off.

Push hoses together, while pushing together squeeze tabs, then pull apart.

These were a little helpful for the vent hose by the filler neck, when snapping it back on. There's not a ton of room for your hands to get a grip on both sides of the hose.

$35 ATD Tools (813 11'' 3-Piece Ring Nose Pliers Set

https://www.amazon.com/ATD-Tools-813-3-Piece-Pliers/dp/B00A7EQF8A

For getting the filler necknhose to break free from the filler neck, these can be helpful:

$38 Lisle 80380 Hose Remover Set - 5 Piece

https://www.amazon.com/Lisle-80380-Hose-Remover-Set/dp/B0079GPYR2

 

I took a bunch of random pics during the modification of the tank unit. Let me know which part and I'll see if I have a pic of it.

A couple of other notes...

When you get to the point of removing the OEM pump from the bucket... There is a tiny hose running up to the top of the bucket and the loops back down the outside of the bucket then snaps in at the bottom. I don't know for sure what it's for, but there's no provision on the Walbro to attach and re-use it. So I just removed that whole hose assembly and didn't put it back on. The truck starts, runs and drives without it.

After putting the tank back in and transferring the fuel back into it. Before starting the engine: (1) turn the key on for a few seconds (2) Turn the key off. Repeat (1) and (2) a several times to allow the pump to prime the lines and get the air circulated through.

When I started the engine with the tank filled, the fuel gauge light was on and stayed there for a few minutes. I thought I had done something to damage the level sensor. But over a period of about 5 minutes, the gauge gradually climbed up to where it should have been. When I fill up at the gas station that never happens. I can only attribute it to the fact that since the tank unit was unplugged it took a few minutes for the ECM to recalibrate. Not really sure as I'm not a Toyota tech, but the short of it is that the gauge is reading fine now.

Also, do your hands a favor and pick up a box of latex gloves.

 

Did you have any problems getting the siphon hose in the tank. I know some newer vehicles have a anti siphon but it looks like you had no problem. The 3/8 hose worked fine?

 

I had problems going through the gas cap opening. That is why I first removed the clamp for the fuel filler neck hose and inserted the 3/8 hose there to do the siphoning.

Here you can see between the cab and the bed, the hose inserted into the rubber filler neck pipe:

 

Oops I guess I over looked that one. Getting ready to go buy the parts needed to drain the tank. Again I appreciate all the feedback and will definitely let you know if I have any questions.

 

Awfully quiet. @tacomavoyager Did you ignite the fumes?

 

Got stuck doing other BS around the house. Unfortunately I won't have time to complete this weekend. Little bummed. I really want to get it done and be ready for the supercharger install but it'll just have to wait until next weekend.

 

Roger that!

I had a productive day. Cleaned out the garage a little, organized the shed, fixed the neighbors' remote start and washed the Taco and both Bimmers. About to head to Grandma's for dinner. Long day.​

 

Thanks for checking in. Hopefully I'll be able to get it done next weekend. And if I run in to problems or have questions I'll let you know. Really thanks again and hopefully we'll get are superchargers shipped out this week.

 

x10

I'm still waiting for my custom Speedhut gauges. The order status says "artwork department". I need to get my O2 bung welded on too. Other than that I think I'm ready.

 

Where are you planning on having the bung welded? looking for some feed back.

 

Innovate says 24" from the exhaust port. But that would put the sensor after the upstream cat. They specify to place it before the cat. If it is after the cat the readings will be artificially lean.

So if we are talking before the upstream cat, I believe the best spot would be on the passenger header sort of pointing toward the driver fender. The driver side would work too, but the steering shaft is right there in that area whereas on the passenger side that space is wide open.

I am not an expert on that subject so I still plan on doing a little reading to see where everyone else has theirs installed and why.

 

Ok, from what I am reading it looks like if you install the bung after the upstream cat down in the Y-Pipe, the amount of difference in AFR readings will only change by up to 0.4 lean. So the Y-Pipe seems to be the ticket. Which will actually be easier to get to for install purposes.

 

Good information.

What I recommend on behalf of TW is for you to consolidate all your posts and info into a separate thread. That way, all the pertinent fuel pump information is in a separate thread and easily archived & accessible as opposed to searching through this long-ass thread.

I'm definitely not saying don't post information here because it's useful as hell, but what you have is pretty informative and it would benefit a hell of a lot people who wouldn't necessarily look in this thread.

Wtf?!

Mine are installed at the 10 & 2 o' clock position a diameter and a half of the pipe distance upstream of the 1st set of cats.