I've got a 98 4Runner with the V6 and a TRD Supercharger, dealer installed when the vehicle was new. I have to replace a fuel injector which requires removing the supercharger. My question is, does the throttle body need to be removed from the supercharger, or can the supercharger and throttle body be removed as a single unit? The only potential problem I see with leaving it attached to the supercharger is removing the coolant hoses from the bottom of the throttle body. I'd appreciate any advice.
Steve

Well since you are pulling the SC, might as well pull the TB and give it a good cleaning ...make sure you use the right gasket when you re-install it though...

Heres the TRD SC install manual in case you don't have it...

http://www.parksoffroad.com/tacomamo...4LSCInstal.pdf

You pretty much answered your own question. Yes, you can remove the supercharger with the throttle body connected, but you then have to remove the coolant hoses. The throttle body only has 4 bolts and a couple connections on it. I'd remove that just so you don't have to worry about radiator fluid spilling everywhere.

Thanks for the advice and the manual. The job went OK, I took it slow and didn't screw anything up. However, after checking 3 dealers for the TRD throttle body gasket, the third one told me there wasn't one in the state, and Toyota can't get them any more. So I left the old gasket on. It looked in good shape but I would have preferred a new one. Also, I bought a can of NAPA/CRC Throttle Body Cleaner, and read the can when I got home which stated NOT FOR SUPERCHARGED VEHICLES. Great. So I cleaned it the best I could with a rag and gasoline. Replacing the injector was complicated by poor clearance for the banjo bolts on the fuel rail at both ends. The TRD belt pully mechanism on the front restricts the timing belt cover which blocks easy access to the front banjo bolt, and the plastic wire harness cover in the back gets in the way of the rear banjo bolt. I managed though and got the job done OK.
Steve

Good job..

My local Stealership also told me that they discontinued the TRD gasket...I ended up ordering one from rimpainter.com - Paint Your Rims Products to paint rims / wheels...

I found that Seafoam works really well for the TB cleaning. Yeah, that tensioner pulley seems to get in the way of everything...

Enjoy the SC...When done right, it makes that 3.4 a completely different motor

I'm looking to remove me SC to send it in for a rebuild. I downloaded the manual. Is it simply a matter of working backwards from the end I've read people take anywhere from 15 minutes to an hour. TIA for your insight!

Yeah for the most part. Honestly there's no "wrong" way to do it. If it helps, this is how I do it since I've had mine off 3 or so times.

1. Remove throttle, transmission and cruise control cables (you may not have all these).

2. Remove intake boot

3. Remove the S/C belt. Make sure you loosen up the oil dipstick first since the tensioner likes to hit it and bend it if you don't.

4. Disconnect all hoses (PCV, brake booster, etc.). Put little labels with tape if you're worried you won't know where the go back. I switched up my fuel return line and vacuum booster once LOL. Let's say I had a strong fuel smell..

5. Remove throttle body coolant lines. If you live in a warm climate where icing isn't an issue you can just get a barbed connector and put these together. Will lower your IAT's without having hot coolant pulsing through your throttle body and never bother with these again. Honestly this is the most tricky part since the clamps are hard to get to.

6. Unbolt the supercharger. You've got the one long bolt as well as the little guys that can be tricky to get to along the intake runners. A wobble extention or universal joint helps a lot here. You might have to use a torx bit if your socket is too big, don't strip them. There's also a nut to take off in the front & back.

7. Take it off. Go slow and if you feel any resistance, stop and figure out what you missed. Lots of little hoses and wire connectors it can snag on.

Yo!!!! Thank you SO MUCH for this! I'm good at following directions, but the install instructions seem to fly right over my head if I have to go backwards. You the man!