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Teg Tip: Fast Idle Thermo Valve (FITV) adjustment/removal/internals

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  • Teg Tip: Fast Idle Thermo Valve (FITV) adjustment/removal/internals

    Fast Idle Thermo Valve (FITV)



    Disassembled



    INFO: At room temperature, the wax in the enclosure is small enough so that the needle is pressed in by the spring loaded valve, thus letting in air through the ring-cap and increasing the idle. The needle sticks out 6mm. As the temperature of the coolant rises to about 150F, the wax expands and the needle eventually protrudes to about 11mm at around 220F. The force of the needle on the spring keeps the valve closed. If the ring-cap is loose, there is not enough force to keep the valve closed thus letting in air and raising the idle when not necessary. These are the steps needed to tighten the ring-cap:

    [Disconnect916 informed us that he was able to just remove the plate and tighten the cap with his fingers]

    1. The FITV is held in by three #10 bolts. Remove the bolts to release the valve from the manifold. You do not need to remove the two coolant lines unless you do not have enough room to do the next step.

    2. The plate is held on with two #8 bolts. Remove the bolts to get the cap off. The plate will fall easily so be sure to catch it.

    3. Now you have access to the cream colored ring-cap inside. What you want to do is tighten it. There are 2 slits along the ring. Unless you have a short screwdriver or tool that is 1" wide, you need to use two screwdrivers in unison to tighten it.

    4. Reattach the plate and bolt the valve back on to finish the adjustment. If you removed the coolant lines, be sure to refill the coolant and bleed the system.


    [email protected]
    Attached Files
    Last edited by XDEep; 04 Nov 2006, 18:07:01.
    autozone online repair manual
    http://www.autozone.com/addVehicleId...leSelected.htm

    supplement with haynes manual from pep boys (<$15). includes vital troubleshooting and maintenence schedules.

    pics of all gsr rims

    b-series dynos

  • #2
    Good info XDEep
    <~~~

    Comment


    • #3
      thanks. you wouldnt believe it but i was so intent on trying to fix my idle problem i had that wax thing in a boiling pot of water, with a turkey thermometer, logging the lengths of the pin with a ruler and leak testing the ring-cap. i still get suction when warm
      autozone online repair manual
      http://www.autozone.com/addVehicleId...leSelected.htm

      supplement with haynes manual from pep boys (<$15). includes vital troubleshooting and maintenence schedules.

      pics of all gsr rims

      b-series dynos

      Comment


      • #4
        does this solve a bouncing idle during warmup?

        Comment


        • #5
          interesting.

          XDeep, can you get some pics for us where this is on the IM?

          Comment


          • #6
            so this would cause the idle to be higher then normal, when not needed.. hummmm...

            sounds like it's my problem right now..

            will try that in a few..

            Comment


            • #7
              also.. can u show us how you tigthen them please?
              knida hard for me to see how to tighten it with 2 flathead screw drivers..

              Comment


              • #8
                Originally posted by Blizzard
                does this solve a bouncing idle during warmup?
                sorry cant think.. need sleep.. more beer. signs point to yes. the iacv would account for idle after warming up.

                Originally posted by Xirphoid
                interesting.

                XDeep, can you get some pics for us where this is on the IM?
                its actually right below the throttle body. the spigot (nipple) is facing towards the front with that S shaped hose thats a bitch to reach.

                Originally posted by tegboi
                so this would cause the idle to be higher then normal, when not needed.. hummmm...

                sounds like it's my problem right now..

                will try that in a few..
                ya the wax would not expand, letting extra air in after its warmed up. however, i dont think there is a sensor that lets the ecu know exactly what is letting that air in. now since the iacv is doing its business and idle speed is set, i would think a readjusted idle screw would mask it. hmm..
                ok when cold the ecu runs in open loop (stored maps) and the FIV lets in more air. when warm the rpms drop and the o2 sensor is used in closed loop mode and the ecu tries to maintain target idle. but if the FIV is not fully closed the idle is raised. does the ecu correct it down? does it correct it down stable or intermittently like a pcv leak? i dunno.

                Originally posted by tegboi
                also.. can u show us how you tigthen them please?
                knida hard for me to see how to tighten it with 2 flathead screw drivers..
                oh just imagine a giant screw. a tiny flathead wont be able to turn it, so you would need to use two next to eachother to simulate a wider flathead. or use the back of a spoon or something..
                autozone online repair manual
                http://www.autozone.com/addVehicleId...leSelected.htm

                supplement with haynes manual from pep boys (<$15). includes vital troubleshooting and maintenence schedules.

                pics of all gsr rims

                b-series dynos

                Comment


                • #9
                  Originally posted by XDEep
                  sorry cant think.. need sleep.. more beer. signs point to yes.


                  or use the back of a spoon or something..
                  hahahaha.. happy new years

                  thanks.. spoon? they always come in handy..

                  Comment


                  • #10
                    whats wrong w my car?

                    when i start my car the idle stays on 1000 rpm but after 2 mins it goes up to 1700-1800 rpm and goes back down after another 3mins..anyone can help me bout this????

                    Comment


                    • #11
                      GRrr!!
                      i cant get the ferkin coolant lines off
                      nor can i use a screw driver to unscrew that part

                      i can get the cap off.. but there isnt enough room to tighten it

                      Comment


                      • #12
                        if you cant twist em loose, you can just cut it wiht a razor length wise and get new ones. now would be a good time to bypass the throttlebody too.
                        autozone online repair manual
                        http://www.autozone.com/addVehicleId...leSelected.htm

                        supplement with haynes manual from pep boys (<$15). includes vital troubleshooting and maintenence schedules.

                        pics of all gsr rims

                        b-series dynos

                        Comment


                        • #13
                          Originally posted by XDEep
                          if you cant twist em loose, you can just cut it wiht a razor length wise and get new ones. now would be a good time to bypass the throttlebody too.
                          one of the coolant lines go to the block and one to the head?
                          one is clamped on and the other is...? (how the the other connected)?

                          (i know both are clamped on the to FITV)

                          Comment


                          • #14
                            Bouncing idle FIXED

                            I went through the steps of this post and also cleaned out my iacv. Now the bouncing idle that has lingered for over a year is finally gone. Hopefully she passes smog and then it is time to install the B17 that has been chillin in the garage for too long. It is time for "Enron" to be on the road again.

                            Comment


                            • #15
                              FITV fixed...too

                              My idle fluctuated too until I came across Ben Ogle's thread and this one as well. I've had the my DA for about 2 months now and the idle has been fluctuating since I bought it. It did the same for the previous owner and he said that all that it need to be fixed was a new IACV.

                              Well $300 dollars later, it kept doing the same thing. I finally got enough time to get into the FITV today and I screwed in the white plastic thing about 20 minutes ago and it's now running like a champ!

                              Thank you very much for your informative thread.

                              Comment

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