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FIAV and ISC removal

In honor of some old threads I *finally* got my lower throttle body off. It's a bitch, or it was. 1 Screw came out easy. 2 came out with the phillips screwdriver bit in the drill. 2 had to be slotted. One broke the flathead bit in the drillscriver
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I'll make a blockoff plate now and give everyone good dimensions. The one bim posted was for a JDM TB so it's slightly off.

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Haha. No that's further down my legs. My car "pants" have giant holes in them everywhere.
 

Yes, I think I would HIGHLY recommend people use an impact driver to remove those screws!
 

me = no impact driver
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me = battery powered drill-scriver and success! The right tools probably would have made this job much easier but mine were as tight as they come and this method eventually did the trick for those out there without an impact driver.
 

turbowop

Well-known member
Joined
Apr 29, 2001
Messages
11,971
Location
Yakima, WA
I replaced the screws in mine after finally getting them out with some nice allen head screws. Now it's easy to get the bottom half off.

I blocked off the FIAV by filling its channel with JB weld, so that I could retain the ISC's function. I just did this tonight so we'll see how it works out tomorrow.
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quote:Originally posted by turbowop:
I replaced the screws in mine after finally getting them out with some nice allen head screws. Now it's easy to get the bottom half off.

I blocked off the FIAV by filling its channel with JB weld, so that I could retain the ISC's function. I just did this tonight so we'll see how it works out tomorrow.
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Replacing the screws with allen head bolts is an excellent idea!
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When I took off the lower half of the throttle body I had to slot all but one screw with a Dremmel tool. Pain in the a$$! Sometimes I wonder who installed some of these screws/fittings/flanges (throttle body screws, fuel line fitting, fuel filter fitting, etc.). Superman, Hulk, Mr. T., or some other ultra-strong 80's figure...
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blockoff.JPG


Blockoff is completed and works pimp'n style
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Bolts are m5x0.8 10mm length allen head. Next up is the throttle body rebuild VFAQ style. I'll post pictures here for those who search the archives. Hehe
 

V8EATER

Well-known member
Joined
Aug 19, 2003
Messages
2,172
Location
Independence, MO
what is the gain in blocking off the ISC? I've already blocked off the FIAV and the EGR for throttle surge issues, but the ISC?
 

Bimmubishi

Well-known member
Joined
Jul 15, 2003
Messages
5,702
Location
Boston, Massachusetts
Two notes on this cause I've done it as well.

When you're done there's an unavoidable feeling like you should have adapted a larger TB instead of tearing the Mitsu' down. I was sort of disappointed with mine because all of the crucial interfaces that made the TB a Mitsu one were gone, the motor, the wires everything. Time may be better spent adapting a 'stang body but who knows. My idle works.

Also, the screws can be grabbed with vice grips if you have nice fresh ones. It makes the job a snap with no chance of stripping the heads.

AL

PS -Plesko.. that is your crotch. Don't deny it.
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The mitsu works really well and I don't really feel the need to go bigger yet. We'll see if that changes now that I eliminated lots of it.

Bim - You know you framed that picture on your wall now
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quote:Originally posted by V8EATER:
what is the gain in blocking off the ISC? I've already blocked off the FIAV and the EGR for throttle surge issues, but the ISC? yes Chris I just read up on the FIAV blockoff on vfaq so I understand that. But can you elaborate more on the purpose of the complete blockoff? Thanks.
 

The ISC basically gives you temp dependant idle changes. Good for a normal car I would think but I don't need it anymore. I"ll set the idle for warmed up and just crack the throttle a bit to get it warmed up when it's cold. Now the only idle controls will be the BISS and ECU. Much simpler for my purposes. Plus I've got no AC and PS is soon to go. My latest quest is to eliminate everything I don't need on this car so If/When I go to a standalone it will be easier and the car gets faster to work on when I break. Probably not what everyone is after.
 

I wanted to keep my ISC so I used the "jb weld" method of blocking off the FIAV.

After getting the 5 screws out(I used an impact driver and still stripped two) pop the freeze plug out by hitting it a couple times.

5 screws and the freeze plug is marked in red
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Put a flate plate over the side that sandwiches to the other half of the TB and hold it there while you fill the channel full of jb weld through the hole where the freeze plug was. It should look like this when you're done.
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Hold or clamp the flat plate in place until the jb weld cures(tip: use jb-quick cure)and then put the freeze plug back if you want. I left it out. Then if you want you can clean the throttle body with a little carb cleaner and reinstall. Rock solid idle baby
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YEAH!!!
 
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