The fuel pump is in the fuel tank, so that may make it hard to upgrade.

 

Say more about what you are trying to accomplish.

Are you talking about the fuel pump or the fuel injectors?

The TRD S/C install requires larger injectors with a modified fuel map to adequately handle the additional forced air.

Even with the mods you mention above, there is no need to upgrade the fuel system. Even if you added a chip.

DEWFPO

 

Only upgrade the fuel system after the install of a forced induction system. The factory system can adjust for all of the mods you have mentioned.

 

I think this is true for almost all cars.... it takes a really big increase in air exchange to go over the capacity of the stock system. Maybe a stroker kit would require bigger or better injectors?

 

yup sounds like you're fine until you supercharge or something. I have most of your mods listed and a chip, and it is just fine with the stock injectors.

 

DEWFPO said it all,

I ran the Y pipe around behind the transfer case so it wasn't underneath it.

 

A chip is the biggest thing you can do to get all you can out of the mods you have listed. I run a custom mapped Unichip. The APR X-1 is another good, possibly better, option.

 

you do not need to upgrade the fuel system. not even for FI, unless you're going for huge numbers.

 

When upgrading to a 7th fuel injector system.

 

That's for the older s/c tacoma applications.

The FJ trd supercharger kit comes with (6) all new higher flow injectors and still DOES NOT require an upgraded fuel pump for proper function.

 

Generally the stock fuel pump is pretty good. It is a two speed unit controlled by the ECU. Under high fuel demand the pump sped up a bit.

The BIG problem is with the fuel filter. The USDM FJ's have the same tank/pump unit as the Tacomas. This is a plastic assembly that contains the pump, the filter, the float level and pump sump.

The fuel filter is very small and the fuel pump sits inside of it. On my truck it would clog up every 30,000 miles like clockwork and seriously restrict the fuel delivery. This caused my supercharged engine to go super lean. Just could not get enough fuel through that clogged up filter.

You cannot buy the filter seperate, you have to buy the whole tank unit for $500-600. I replaced the whole tank unit the first time, then 30,000 miles later, same thing. I was not going to buy another expensive tank unit and came up with a fix.

I found a way to adapt a high flow Walbro 255 LPH fuel pump into the tank unit replacing the small stock one. Then I relocated the filter outside of the tank. Now it takes just a couple of minutes to replace the fuel filter if needed. It has been over 40,000 miles now on the new pump and filter and it is not clogging up. I am using a LARGE filter compared to the stock one. This is a much cheaper way to fix this problem then replacing it with a new tank unit from Toyota. It also gives you more fuel for those thirsty supercharged applications.

The FJ's in other world markets are different. When I was in Columbia I saw the FJs down there had the fuel filter mounted in the engine compartment on the driver's side inner fender wall. Look much like the one used for 5VZ-FE applications, but had quick disconnects on it.

http://www.urdusa.com/product_info.php?cPath=79_12&products_id=1260518592

Gadget

 

The FJ's in other world markets are different. When I was in Columbia I saw the FJs down there had the fuel filter mounted in the engine compartment on the driver's side inner fender wall. Look much like the one used for 5VZ-FE applications, but had quick disconnects on it.

Underdog Racing Development

Gadget

Some years back the Fed in saving the American consumer /car owner money made car makers reduce the cost of maintaining cars so fuel filters were no longer needing replacement at 30 K 60 K or even 100 k mileage interviles. So it went into the fuel tank with the pump assembly and only needs replacement if the car doesn't run right, driveability issues. Sure would be nice if it was back out where it was easy to get to. Now very big bucks to replace the entire assembly, where was / is the savings?

 

Hey Gadget... does that system throw any errors on the FJ's ECM?

 

No.

G

 

Sounds like a mod I'd be interested in doing to my rig...