How to fix your stalling Miata for FREE - Throttle body IAC

1992 NA Mazda Miata - stalling at idle. This is my free fix for rough idling and stalling when the car warms up.

[@MikeB_UK]

This is NOT the throttle idle control. What you have worked on is the 'throttle dash pot'. This item is not fitted to all cars around the world. It is a damper that slows the closing of the throttle which can help prevent engine stalling. Bad idling is usually the idle control valve not working and that can be found in other videos or forums.

[@N-JOEI]

ahh thank you, I was a little confused too because my car didn't have that

[@christopherpaez4948]

Do you happen to know what those hoses are that are at the side of the intake? It looks like there is coolant In then on my brothers Miata and I’m not sure that’s normal

[@MXCoriginal]

Ah crap I'm so damned confused

[@seriouscatisserious]

Thanks for this tutorial. One thing to note, be very careful when removing the rubber boot around the pot. Some of these are 30 years old, and mine ripped in half. :/

[@alanszymczak6173]

Thanks just bought a 1990 Miata low miles the rpm's drop when you push the clutch in, your video helped!

[@johnnycee5179]

Doing this and it working would be a whole lot cheaper than trying to replace the IAC, it's worth a try.

[@huhnturr]

Would have been nice to actually see what was going wrong...

[@Extremecakespetal]

I am not knocking you for names of parts being wrong. Great job with video an voice. Great job trying to fix it your self. My daughter in a coastal region just found 5 mechanics that no one should take there car to. They told her everything from bad throttle body, worn out engine, bad clutch, imbalance drive shaft, an. One even said “the Miata surges because you right front wheel an your left rear wheel are out of balance,,”, the last but not lest was what another mechanic said,” Your 94 Mazda Miata MX 5 is programmed to get air out of your brake system that way. You have air in your brake system. . I showed here how to fix it. One mechanic had it in the right area. He was going to change the throttle body. But if he did not change everything connects to it, it would be just partially fixed.

[@MXCoriginal]

Would've really helped if you went back and refilmed taking the thing off, most miata videos are on 1.8 engines and I'm very confused

[@classic287]

I wonder if this is what I need to do. Is this diaphragm what keeps the throttle from dropping too fast? Thanks..

[@justin54511]

classic287 yes

[@classic287]

Justin Nonya , That’s completely missing on my 99...

[@alexmassa9226]

how long did this fix last?

[@hannahbeaty6628]

I can not for the life of me find where that first 10m bolt ( 1:59 ) is that we need to take out… anyone know where it’s at? I can’t tell from the picture smh

[@vexpho4512]

did u find it?

[@charlieedmonds1376]

Thanks

[@marciaz31]

I like where you live .....

[@josednn]

Thanks!

[@christopherw8654]

My miata idles good but when I hit the gas it stalls.

[@malachibury9006]

Mine is doing the same thing, did you ever fix it?

[@jacobk9049]

Most likely your fuel filter. Does it get worse the more gas you give it?

[@austinsoto7247]

@@jacobk9049 if i hold it down it will rev up all the way to redline but will almost stall when i first press it down. i have a 1990 miata

[@user-jb7sg7zv5h]

@@austinsoto7247did you ever figure out what it was, I’ve had this problem for over a month now and I’m dying to fix it

[@jewvonte]

🤨 0:32

[@MrEzplay]

Thanks! What’s the name of the diaphragm?

[@concordsst]

Dashpot

[@justsaiyansteve]

Dang great tip. Thanks.

[@TheNorcalshooter]

Hey thanks for the Tip , My 93 miata is doing the dip idle thing , i will have to do that fix today

[@KineticLatency]

Mine is suffering from the same, did this work for you?

[@angelmx5734]

Same i need to try it today

[@LockdownFilms]

Great vid man! seeing the spraying part would help but its good to know about that diaphragm! I had no idea! Im going to check mine! also, I would replace your RAD hoses since you are going restore route! I just did mine from MISHI, and I love em! keep up the restore videos going, I am doing the same on my channel! cheers!

[@tens8635]

Just a tip to others if this doesnt fix your idle, try replacing your fuel filter. i was getting a 18 afr idle jumping up and down, its a $10ish fix, even if it doesnt fix your issue it will help