Intake Silencer Removal Mod Update
For 2002 Rigs
1/2/2003

Paul (ALBPM on the forums) shows you how he did the Dr. Z intake mod, and had to do a few things differently on the 2002 engine.

Here's the Revised Mod for a 2002 4x4 4-Runner as the engine differs from the 2001 and earlier models.
Notice the lack of a hose port on the plenum below for the 2002 engine.

Step 1:
This is the FPR hose that was attached to the Air Silencer Box - Now removed and replaced with a Stainless Steel Pipe. It won't be needed so remove it.

Step 2:
Locate the "Capped Off" Steel tube coming out of the rear of the plenum. Remove the cap. You will also see a length of unused steel tube on the top of the plenum.

Step 3:
Locate the round FPR unit behind the plenum. Remove the piece of vacuum tubing that connects it to the steel pipe running under the plenum to the front. You have already removed the larger hose from the front end of this steel tube in Step 1.

Step 4:
Now you are ready to add the new Vacuum Hose to connect the unused line coming out of the rear of the plenum to the FPR unit. I bought 2 ft of NAPA part # H-459 it cost a whole $1.25
You will need ~3.25" to connect the capped end to the steel tube. (right side in picture)

Step 5:
You will need ~11" to connect this end of the steel tube to the FPR unit.

Now, pull the EFI fuse out for a few minutes and you are done...

Total cost for the 2002 and possibly 2001 Mod done this way was $6.25 total.

$5.00 for the stainless pipe that replaced the Silencer Box and $1.25 for 2 ft of the NAPA vacuum hose (part # H-459).

Here is the mod in place on Paul's engine.

If you choose to do this mod good luck, and if you have any questions  (ALBPM) on the Yotatech Forum.

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