45 replies to this topic

[joemaniaci]

Warning: When you take off your throttle body, be sure not to twist the body around the throttle cable or let it hang somewhere by the throttle cable, otherwise when you put the TB back on, the throttle cable will be tight and your idle will be quite high.

This is for people with rough or erratic idling, also for most people having issues with stalling, it also wouldn't hurt to spray down all electrical connectors while doing all of this work.


LOCATIONS

LOCATION IS UNDER THROTTLE BODY

BEFORE BEGINNING, DISCONNECT AND REMOVE BATTERY, ALSO REMOVE ENGINE COVER, AND ALSO REMOVE WHICH EVER INTAKE YOU HAVE


TO REMOVE MAF YOU NEED TO TAKE OFF 2 PHILLIPS SCREWS AND DISCONNECT THE CONNECTOR


THESE TWO WHITE ELECTRODES ARE WHAT MAKE YOUR BREAK YOUR MAF, SO BE CAREFUL


DISCONNECTING THE PVC, USE A LONG SOCKET, UNLIKE ME


JUST SHOWING YOU HOW TO CLEAN, SPRAY BOTH SIDES WHILE JIGGLING IT SIDE TO SIDE, SHOULD SOUND LIKE A SPRAY CAN, BUT NOT AS CLANKITY, BLOW INTO IT AND AIR SHOULD ONLY FLOW IN ONE DIRECTION


RADIATOR LINES GOING INTO IACV


DISCONNECT RADIATOR LINES AND PROP THEM UP SO YOU DONT LEAK FLUID

REMOVE THROTTLE BODY, ONLY HAS 4 BOLTS, FORGOT TO TAKE PIC

Edited by joemaniaci, 09 November 2007 - 05:19 PM.

[Roxtar]

i'll have to take another look, but i thought the iacv screws were a 5-point design? in any case, they will be a b**** to remove.

[joemaniaci]

REMOVING IACV FROM TB, SCREWS ARE SOFT SO USE SCREWDRIVER THAT FITS THE SNUGGEST, THEN BANG THE END OF THE SCREWDRIVER SO IT LOOSENS THE SCREWS AND CAUSES THE SCREWDRIVER TO FIT BETTER


HARD TO GET ADAPTER FOR THESE SO USE CHANNEL LOCKS, VICE GRIPS OR A TRUSTEE GERBER AND TWIST THE SIDES TO GET THEM OFF


AFTER THOSE COME OFF YOU CAN SEPERATE THE TWO PIECES EXPOSING THE END OF THE SHAFT


THIS IS THE PART OF THE SHAFT YOU WILL SPIN WHILE CLEANING


WHEN YOU FIRST SPIN, ITLL IMMEDIATELY STOP,NOW HOLD THE CHANNELS TOWARDS THE GROUND WHILE SPRAYING UPWARDS AND SPINNING THE SHAFT, YOU WILL IMMEDIATELY NOTICE YOU CAN SPIN AND ITLL ROTATE ON ITS OWN SEVERAL TIMES


USE QTIPS FOR THOSE HARD TO REACH PLACES, DONT GET A CHUNK OF COTTON LOOSE IN HERE


CHANNELS ON TB, CLEAN WITH THE SPRAY AND QTIPS


TB AND CHANNELS AFTER ITS CLEANED

Now just install the two IACV pieces back together, reattach the IACV to the throttle body, reattach the PCV and the MAF in their respective places, then reattach the throttle body to the intake manifold and reconnect the two radiator lines to the IACV.

[joemaniaci]

props to whoever it was who did the original MAF cleaning guide and to reggaetrix for letting me know about the IACV

[Petrucci914]

joemaniaci, on Mar 23 2007, 06:59 PM, said:

props to whoever it was who did the original MAF cleaning guide and to reggaetrix for letting me know about the IACV

Is the IACV the same thing as the TPS (Throttle Positioning Sensor)? Also, what is the other sensor on the Throttle body? I've been having a little bit of rough idling and some hesitation and I want to do this. Thanks.

[XR2003]

joemaniaci, on Mar 23 2007, 04:59 PM, said:

props to whoever it was who did the original MAF cleaning guide and to reggaetrix for letting me know about the IACV

that would be mistamatrix.

[serialtoon]

So what advantage does this have besides being shiney and clean?

[Ludoc]

Any chance we can get a size on that screw / nut for the Idle Air Control Valve?

Thanks in Advance....

[joemaniaci]

No, its a 6 sided spline key, never have been able to find an adapter for it, just use pliers and attach them to the side of the heads and twist and theyll come off.

The advantage is a much much smoother engine and especially idle, I have no vibrations at all, plus cleaning your MAF at least feels like you have more power, dont know if it actually does.

What happens is that CAI's do not filter as well and the IACV gets clogged real easier and there are a lot of people whos trix' are starting to stall and this will fix it.

[Ludoc]

Cant tell from the picture if it is 6 sided or not but mabey a torx bit? i know the MAF has torx bit screw heads...

[joemaniaci]

well I know for every year and model of matrix, there are actually 4 sub-versions, cause you have canadian,50-state legal,49-state legal and 48-state legal versions of matrixs. There are actually 3 different IACVs for example, so their screws might be different, I have regular phillips on my MAF, but I guess everyones will be different

Also some of the IACV in your cars are gonna be piston style instead of a rotating type, but I figure you could clean it just as well once you take it apart too.

actually, looking at that pic now, it is a spline key, so it should only have 5 grooves, not 6. but then again, everyone might have something different

Edited by joemaniaci, 10 April 2007 - 07:08 PM.

[Ludoc]

cool man ill give it a look in the morning... good article btw.

[XR2003]

The MAF on mine uses regular Phillips.

thanks for this "How-to" Joe. - Got me a project to do on my next day off.

[ManiacMartin]

awesome, exactly what I wanted to know, lol thx!

[serialtoon]

I do get alot of vibration during idle..maybe i should try this out.

[joemaniaci]

well if any of you do all this, let me know how it went

[Vinster03XR]

XR2003, on Apr 10 2007, 10:50 PM, said:

The MAF on mine uses regular Phillips.

Same here... but the 6 sided spline screw shown in that pic is a torx screw.

Vin

[DiamondJim]

according to this pdf
of the Throttle body parts, there is a metal gasket that is nonreuasable. did u get a new gasket or did u just put the one in that you already had...

[joemaniaci]

DiamondJim, on May 20 2007, 08:58 PM, said:

<a href="http://s94687403.onlinehome.us/data/ileaf/07toyrm/07toypdf/07rmsour/matrixrm/00500710.pdf" target="_blank">
according to this pdf
</a>of the Throttle body parts, there is a metal gasket that is nonreuasable. did u get a new gasket or did u just put the one in that you already had...

No, I reused it, I have no idea why they say that, its metal. I have done two cleanings with 4 months in between and I didn't see any excessive crud or dirt on the second cleaning to make me feel as though it can't hold up being reused

[kollerXRS]

nice, now i have to do this, mine have to be cloged and more if I have a CAI taking all that dirt from the ground... tnx!!