Wonky Idle? Cleaning Miata IACV.

In this video I decide to clean my idle air control valve (iacv) which hopefully will solve my issue of idle drooping to 500 rpm when coming to a stop or sometimes randomly when sitting and idling. Time will tell...

[@lousarsol9005]

This was really cool! Thank you for running us through it and doing a little test drive, would love to know if it comes back. I had an issue with rough idle that I couldn't fix. Replace plugs, replace leads, sent the injectors away for testing and they were performing optimally, intake sensors were brand new, found a hole in the muffler which I thought was a good enough excuse and bought a new one. So I caved and asked my mechanic to look around, stuck EGR valve! 30 minutes of labour was all it cost me! Runs perfect now (just needs a tune) but your insight is invaluable and might save many more people down the line.

[@thirdgengarage]

Thank you, I'm hoping it solved it but if it doesn't i'll be sure to make a follow up video with anything else I try. Yeah, it seems like so many things can effect idle, it's alway the one thing you didn't think of trying 😂.

[@MrClean-du9zo]

Had this problem on a nb2, cleaned the idle air control valve and the upper plenum, more work but man did it make a big difference.

[@thirdgengarage]

I’ll add that to the list, thanks!

[@iamzbla]

I have to do the exact same thing on my Miata 😊 thanks for the video man 💪 your Miata looks great 😋

[@thirdgengarage]

No problem, thanks for checking out the video! 🙏

[@MotorBlades]

having a rough idle as well about to try this, thanks for the instructional video

[@thirdgengarage]

No problem 👍

[@GhostFlipping]

hey this was super helpful thanks!

[@thirdgengarage]

No problem!

[@murderedluv]

great video

[@thirdgengarage]

Thank you!

[@cosmo7787]

I have a high idle in my 99 NB but have replaced the IACV and cleaned the throttle body

[@thirdgengarage]

Sometimes mine is fine then out of nowhere it’ll be weird…. Then back to fine 😅

[@mattjacomos2795]

you probably have a vacuum leak somewhere...

[@mu5icman028]

Are those aftermarket headlights?? They look different than the stock ones. If so, where'd you get them?

[@thirdgengarage]

They’re the OEM NB1 headlights with a mini h1 projector retrofit, painted black trim and added led DRLs, did them myself.

[@mu5icman028]

@@thirdgengarage dang! Amazing work!!

[@kian3705]

bro whats the name of your sideskirts and where can I get them they look fire

[@thirdgengarage]

The sideskirts are oem, luckily i found some at a local junkyard a while back. I made the bottom splitter pieces out of PVC moulding from home depot.

[@martyrogers1154]

Gonna try this. Works fine till warm the. Idle goes to 500 to 2000rpm 😢

[@thirdgengarage]

Hope it helps!

[@mattjacomos2795]

check for a vac leak man. when it happens after warming up I'd bet a Million Bucks that's the issue.

[@smttywrbn]

Did it work?

[@martyrogers1154]

@@smttywrbn yes it worked. It was Full of black soot

[@mariocarreon1373]

How has it been running since cleaning the valve?

[@thirdgengarage]

The idle still dips just not as far or as frequent. Not perfect but it was an improvement.