Thanks. I enjoy the mechanic side as well as the creative side of putting these kind of DIY automotive videos, and I would like to make a lot more in the future, but I need a Prelude first. Any donations out there?
Literally the best maintenance/repair video I've ever seen. Literally just got done doing this whole process on my 97 Prelude SH thanks to your video. I did a cold start up and it's pretty cold outside as it was idling very high and it didn't do that stupid self revving idle thing anymore
This is very helpful as my '00 Type SH is also acting up in a similar manner, I start her up and she sometimes idles at 1,000 RPM on a good day, but most of the time like around 700 and dropping to 500 and going back up to 700. The car turn off on me on neutral because my intake was completely loose, but we got that taken care of. Now at least twice a day my car turns off on me while I'm on neutral, RPMs dropping to zero and stuff, but this video should help me fix that (: Your videos encouraged me to get under the hood and get to know my car more better, thank you
+Gustavo Castillo No problem, glad I could help out. It sounds like you most likely have carbon build up in the FITV and/or the IACV. Remove it and clean it out. It should fix the issue.
If you don't live in a cold (winter freezing) climate you can just disable this, disconnect the coolant line and route it straight back to the thermostat housing, then blank off the part where the three o-rings are with some paper gasket material (not normal paper!). you'll never have any problems with it again and as a bonus it won't be heating up your throttle body and intake air.
I did not use the metal plate as in this write up, I just put the gasket material between the 2 pieces and bolted them back to together, been fine for several years so far. www.preludeonline.com/f91/how-tb-iac-coolant-bypass-block-plate-118675/#/topics/118675?_k=qjgisg
OK YOU WIN I WILL COMMENT!! THIS CLEANING WAS A SAVER FOR ME I WATCHED ONE VIDEO WHERE HE SAID TO TIGHTENED ALL THE WAY DOWN. I DID IT SUCKED YOUR VIDEO TWISTED IT BACK UP TOWARDS THE TOP I REDID AND IT SAVED MY 300 DOLLAR CIVIC. STILL GOT NORMAL CODES BUT ITS DRIVABLE. I WILL WORK ON THE OTHER TWO CODES FOR THANKS FOR THIS VIDEO. ABSOLUTELY AMAZING.....
Thanks for commenting. Glad it helped out. Yes, you're supposed to tighten the valve all the way down then go back about a turn and a half. Something like that. I forgot exactly as I haven't done this in a very long time. Cheers
Does anyone know if the fic needs to be adjust all the way down? Especially when trying to burp the system? Just did a swap, and j have very low idle. Yes everything is clean and new.
What does this do exactly? Does it bypass the valve? Mine was about 1/2 way threaded in, why is it even threaded? Screwed it in most of the way, idles a lot lower at cold start, but idle still fluctuates after it warmed up on cold days 1500-2500 rpm up and down constantly. Thanks for any info
Hi, so sorry I missed this comment and did not reply much sooner. My 97 Prelude would die sometimes while stopped at a red light or stop sign. As the vehicle got older, the engine started to die more often when at a full complete stop. So cleaning out the FITV and IACV will help improve the engines idle, if the engines idle is bouncing around and/or going down to 0rpm, at a stop light, stop sign and start up. The FITV and IACV just gets a build up of carbon and it blocks the airflow.
Im getting an idle surge after/during cold start.. the idle will raise to 2k rpm and back down to normal idle.. so no stalling just rasing idle and this is intermittent, somedays its normal.. could it be the fitv?
Hello nice video man. :) I have h22 IACV idle is the problem even if i already change a new IACV. I have skunk2 alpha 70mm TB so it means i don't have FITV. what do you think any causes i'd still have a poor idle? hopes you can help me please.
Check for vacuum leaks all around the manifold. If you just installed a new throttle body, you might need a new gasket. But check for any air leaks all around the throttle body and then the intake manifold. That would be my best guess.
Just bought a lude 1996 si h23a only after car is warm up ,idle rises to 2-3000 rpm when i pull back on gas pedal rpm returns to normal . Any help can be appreciated.
Congrats on your new ride! Preludes are amazing, never give it up! May you clarify a little? I'm not sure what you mean. The engines idle rises to 2-3000 RPM when the engine is at operating temperature?
Yes, you can ask. Bleeding the coolant after disconnecting the FITV will remove any air that got into the system. Otherwise, there will be an air bubble stuck in the coolant lines which will cause a bouncing idle. Sorry for the late response!
I don't know. I did not replace the ECT sensor though. And I no longer have the vehicle. It was parted out and put back to stock then sold. Looking to get into a 4th gen now, 94-96 SRV
I heard some people using water in a spray bottle while others use carbon cleaner/brake cleaner. Which ever you decide to use, just let it dry throughly.
I think I changed the TB from Gude Performance Bullfrog back to OEM. If member serves me well, I was parting out the vehicle back then, and converting everything back to OEM to sell the Prelude all stock.
Hi mike... i did this and turn it all the way.. when i put it back, im getting really low idle, and when i put it in drive, it feels like its going to stall? should i turn it back half way?.., i also cleaned the idle control valve(iacv)
I'd experiment. Turn it a little more, another half turn, see if it improves. If it doesn't, turn it all the way back to the very end and see if that helps. Let me know how it goes. Sorry for the late reply.
Once you disconnect the FITV and or the IACV air will most likely get into the coolant system. Therefor you should bleed the coolant to get rid of any air bubbles. You might be able to get away with it by opening the rad cap, start the car and let the vehicle run for several minutes. You should see air bubbles coming out of the radiator.
If I remember correctly, screw it back in all the way then turn it back about a full turn and a half, so 540 degrees. It should say somewhere at PreludePower website.
Sure. That can work too. One will also require a proper block off plate, and possibly a tuned ECU as the stock H22A4 ECU is not set up to run correctly without the IACV. Nonetheless, this video is about the Fast Idle Thermal Valve (FITV). So, a little different, but the same principle applies.
This entire video is a masterpiece from start to finish. Thank you for your service to us all
Thanks. I enjoy the mechanic side as well as the creative side of putting these kind of DIY automotive videos, and I would like to make a lot more in the future, but I need a Prelude first. Any donations out there?
Man if all car maintenance/repair videos were like this...
Thanks, I try to make it easy to watch.
i need to listen to this kind of music so i won't loose my shit...thanks
+nezerpgs Classical music is quite soothing.
Literally the best maintenance/repair video I've ever seen. Literally just got done doing this whole process on my 97 Prelude SH thanks to your video. I did a cold start up and it's pretty cold outside as it was idling very high and it didn't do that stupid self revving idle thing anymore
Glad it helped!
I cried at the end of this! Very good.
Probably the best video I've ever seen, great choice in music and I appreciate the walk through. Hopefully this fixes my preludes problem. Thanks!
This is very helpful as my '00 Type SH is also acting up in a similar manner, I start her up and she sometimes idles at 1,000 RPM on a good day, but most of the time like around 700 and dropping to 500 and going back up to 700. The car turn off on me on neutral because my intake was completely loose, but we got that taken care of. Now at least twice a day my car turns off on me while I'm on neutral, RPMs dropping to zero and stuff, but this video should help me fix that (: Your videos encouraged me to get under the hood and get to know my car more better, thank you
+Gustavo Castillo No problem, glad I could help out. It sounds like you most likely have carbon build up in the FITV and/or the IACV. Remove it and clean it out. It should fix the issue.
One only one Tear drop dropped down my right eye 👁. Beautiful video
This honestly made me tear a bit .. Job well done with the music and video ;__;
Please keep the lude videos coming. SO USEFUL!
If your having a rough bouncing idle , clean out that iacv. It really helps . Mine was completely gunkd up.
How do you know how far to unscrew the IAC back out after putting it back in?
Measure how far the screwdriver goes in before you unscrew it.
Thank you so much for this video, it helped me fix/service my accord's 94 FICV...
If you don't live in a cold (winter freezing) climate you can just disable this, disconnect the coolant line and route it straight back to the thermostat housing, then blank off the part where the three o-rings are with some paper gasket material (not normal paper!). you'll never have any problems with it again and as a bonus it won't be heating up your throttle body and intake air.
I did not use the metal plate as in this write up, I just put the gasket material between the 2 pieces and bolted them back to together, been fine for several years so far.
www.preludeonline.com/f91/how-tb-iac-coolant-bypass-block-plate-118675/#/topics/118675?_k=qjgisg
Holy shit youre description sounds exactly like my problem lol ive been chasing this weeks thank you so much im goona do this
OK YOU WIN I WILL COMMENT!! THIS CLEANING WAS A SAVER FOR ME I WATCHED ONE VIDEO WHERE HE SAID TO TIGHTENED ALL THE WAY DOWN. I DID IT SUCKED YOUR VIDEO TWISTED IT BACK UP TOWARDS THE TOP I REDID AND IT SAVED MY 300 DOLLAR CIVIC. STILL GOT NORMAL CODES BUT ITS DRIVABLE. I WILL WORK ON THE OTHER TWO CODES FOR THANKS FOR THIS VIDEO. ABSOLUTELY AMAZING.....
Thanks for commenting. Glad it helped out. Yes, you're supposed to tighten the valve all the way down then go back about a turn and a half. Something like that. I forgot exactly as I haven't done this in a very long time. Cheers
Informative and peaceful thank you!
This is such beautiful music.... thank you sir
No problem, glad you like it.
Love the music it's so relaxing.
Beautiful music.. tears...
Claire de Lune - Debussy... Amazing song. Thanks for the explanation
Good bro, thanks a lot, music, advices and knowledge
Excellent video. Helped me out.
Have some gasket making material ready a hand before doing all that amd don forget to unplug the battery terminals also before doing all of that.
Thank you so much for this video it helped me so much.
The one coolant line can you disconnect it without losing any coolant
usefull 100% / полезная видяшка для клапанов такого типа
Wow I really enjoyed this video, thanks
Evil within song !!!!and I have a prelude best of both worlds!
Does anyone know if the fic needs to be adjust all the way down? Especially when trying to burp the system? Just did a swap, and j have very low idle. Yes everything is clean and new.
This video fix my prelude engine surge
Surge while your driving or when you start up
@@randygentry1533 fixed it on Startup
@@randygentry1533 If you are having a surge or power loss while you're driving it is the idle air control valve .
How do you screw the plastic part all the way down mines get stuck with 2 full turns and then I have to twist it back up to redo the process
Awesome video! I'm doing this tomorrow!!
Thanks, good luck!
@@mikeschmeeedotcom it worked! thanks again!! Idle doesn't drop down low when coming to a stop anymore.
@@diegomoya8404 Nice! Glad to hear that it worked out. Cheers!
What does this do exactly? Does it bypass the valve? Mine was about 1/2 way threaded in, why is it even threaded? Screwed it in most of the way, idles a lot lower at cold start, but idle still fluctuates after it warmed up on cold days 1500-2500 rpm up and down constantly. Thanks for any info
Hi, so sorry I missed this comment and did not reply much sooner. My 97 Prelude would die sometimes while stopped at a red light or stop sign. As the vehicle got older, the engine started to die more often when at a full complete stop. So cleaning out the FITV and IACV will help improve the engines idle, if the engines idle is bouncing around and/or going down to 0rpm, at a stop light, stop sign and start up. The FITV and IACV just gets a build up of carbon and it blocks the airflow.
How do you adjust the middle part of the valve after cleaning it??
Im getting an idle surge after/during cold start.. the idle will raise to 2k rpm and back down to normal idle.. so no stalling just rasing idle and this is intermittent, somedays its normal.. could it be the fitv?
Hello nice video man. :) I have h22 IACV idle is the problem even if i already change a new IACV. I have skunk2 alpha 70mm TB so it means i don't have FITV. what do you think any causes i'd still have a poor idle? hopes you can help me please.
Check for vacuum leaks all around the manifold. If you just installed a new throttle body, you might need a new gasket. But check for any air leaks all around the throttle body and then the intake manifold.
That would be my best guess.
thank you i will check all.
Just bought a lude 1996 si h23a only after car is warm up ,idle rises to 2-3000 rpm when i pull back on gas pedal rpm returns to normal . Any help can be appreciated.
Congrats on your new ride! Preludes are amazing, never give it up! May you clarify a little? I'm not sure what you mean. The engines idle rises to 2-3000 RPM when the engine is at operating temperature?
mikeschmeeedotcom. Yes like a sticky gas pedal. After car is warm . idle rises .
Clean your IACV. It controls idle on a warm engine.
Laughing at the comments of this music lol nonetheless love the b!b6 vids make more pls
This fix your issue?
can I ask why bleed the coolant ?
Yes, you can ask.
Bleeding the coolant after disconnecting the FITV will remove any air that got into the system. Otherwise, there will be an air bubble stuck in the coolant lines which will cause a bouncing idle.
Sorry for the late response!
Aaaand it still surged because the real problem was the coolant temp. sensor. No?
I don't know. I did not replace the ECT sensor though. And I no longer have the vehicle. It was parted out and put back to stock then sold. Looking to get into a 4th gen now, 94-96 SRV
@@mikeschmeeedotcom how many turns to loosen when adjusting please?
What type of screwdriver tip called ?
Sorry for the ignorance but what can I use to clean it?
I heard some people using water in a spray bottle while others use carbon cleaner/brake cleaner. Which ever you decide to use, just let it dry throughly.
It’s clear u change the throttle body but never mention why n wat kind of throttle body that u replace it with
I think I changed the TB from Gude Performance Bullfrog back to OEM. If member serves me well, I was parting out the vehicle back then, and converting everything back to OEM to sell the Prelude all stock.
Thanks for the video! when screwing the diaphragm back in, do you keep turning it till it doesn't go any more?
All the way then turn it back about a full turn and a half.
Hi mike... i did this and turn it all the way.. when i put it back, im getting really low idle, and when i put it in drive, it feels like its going to stall? should i turn it back half way?.., i also cleaned the idle control valve(iacv)
I'd experiment. Turn it a little more, another half turn, see if it improves. If it doesn't, turn it all the way back to the very end and see if that helps. Let me know how it goes.
Sorry for the late reply.
IAC cleaning video you will have
do I really need to do a coolant bleed when doing this? are there any ramifications if i don't?
Once you disconnect the FITV and or the IACV air will most likely get into the coolant system. Therefor you should bleed the coolant to get rid of any air bubbles. You might be able to get away with it by opening the rad cap, start the car and let the vehicle run for several minutes. You should see air bubbles coming out of the radiator.
mikeschmeeedotcom ok I'll get right on that, thank you
this music is dope
That white thing with the spring, how do I know hjow much to screw it back In?
If I remember correctly, screw it back in all the way then turn it back about a full turn and a half, so 540 degrees. It should say somewhere at PreludePower website.
Hey do I twist it all the way down and bring it up a little.
yup! Bring it back up about a full turn and a half. That's what I remember reading on the Prelude Power forums
And you are parting this beauty out :(
Yea I'm gonna play some Beethoven while I do my repairs. Thanks
Nice!
Found problem it was leak on downpipe.
Sweet! How did you fix it? With new Mugen parts?! :)
I wanna like it.. but I can't ruin the perfect like number
The easiest way to deal with fast idle iacv bs is just delete it and the problems go away
Sure. That can work too. One will also require a proper block off plate, and possibly a tuned ECU as the stock H22A4 ECU is not set up to run correctly without the IACV.
Nonetheless, this video is about the Fast Idle Thermal Valve (FITV). So, a little different, but the same principle applies.
😴