How to Remove and Clean Intake Manifold (Clogged EGR) - Mazda Miata MX-5

Do you have a check engine light on for the EGR being clogged? Here is how you remove the intake manifold and clean it. This is also how to replace an intake gasket. This applies from 1990-1997, but should be similar to the 1998-2005 Miata's.
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Note: Do this repair at your own risk! I am not responsible for any injuries or deaths. Improper use of tools, vehicle lifts, jack stands, electrical equipment, cleaning/penetrating oil/fluid and other chemicals and tools used in this video can result in serious injury and can be fatal.
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Channel Tags: Mighty Mechanic, The Mighty Mechanic

[@IIKCARUS]

Thanks for the video! The most informative and helpful one I could find online. Was able to get my EGR cleaned out and found a leaking injector at the same time. Car running like a top now. Thanks for saving me money!

[@MightyMechanic]

Glad it helped you out!

[@charlesmcgehee3227]

Well described. No wasted words. Just a very clear narration and demonstration. Thank you.

[@karloman00]

About to buy a used Miata with this issue for a steal of a price. Good to know the job isnt difficult

[@NovemberContent]

My '97 just threw a P0400 code. This is very helpful, thanks!

[@MightyMechanic]

You are welcome! Glad it helped.

[@jnmarycharles5754]

Thank you so much for your great support.Today With your video I managed to repair my car

[@ne0tekk1]

Great video, I've been meaning to get around to this but after seeing you do it first, it sure will make the job go quicker. Watching other people do the work on KZbin is so helpful, so much time saved. Thanks!

[@Dragon228833]

How do u reach the bottom nuts on the manifold

[@WiSeNhEiMeR-1369]

G@@D INFORMATION - but - it would have HELPED me considerably = if you would have kept the CAMERA rolling ... while you took the FUEL-RAIL out & when you removed the INJECTORS ... I missed so much of what I wanted to SEE because you only focused on your EGR Valve removal & cleaning --- Thank YOU for the VIDEO and the How-To on the EGR ( I had no idea that this passageway even existed or that it could become this CLOGGED !) = thanks again

[@joro8604]

Great video. Really helped me out a lot.

[@bleedingblacklife]

Do you need to also put a new gasket between the intake manifold and the throttle body?

[@KeepRolling1000]

You should change your radiator, looks like about to burst soon.

[@centripetal25]

This whole process could be avoided with the Otis cable-based gun cleaning kit. You can just feed it in top to bottom after you pop the EGR valve off.

[@jdahl7376]

Link for it?

[@malmansoori2384]

Yeah but how tf you gonna know how much you took off or if it’s cleaned all the way?

[@centripetal25]

@@malmansoori2384 its generally enough to clear the code / restore function so unless its just for the OCD, it serves the purpose

[@malmansoori2384]

@@centripetal25 You are so right! Lol i just tried it today i didn’t have to take the whole intake out i just sticked the lil thing in all the way and you could barely see it if you opened the throttle idk hopefully it removes my check engine light tho ( i already cleaned the egr valve )

[@drego42]

Great video! are you using any chemicals like throttle body cleaner to help the process?

[@MightyMechanic]

Yes, throttle body cleaner will help get more of that carbon out.

[@PrincetonTV]

9:10 - Looks Like Coffee , maybe that's how they get coffee? What do you think?

[@djisch]

Quick question. Csn i just light the inside on fire and blow it out? Or is there something in there that shouldn't burn. Because i have seen people just burning it out. Propably not because of the vics flaps

[@nando1584]

I wanted to know how you got the bottom to the right bolt off .

[@sokero85]

Awesome man thanks

[@anandkmurthy]

My MX5 NC thrown P2009 code any suggestions pls

[@asice716]

How do you know you have a clogged egr valve? I have a p0410 & p0171 code on my nb1 Miata.

[@GardsFTW]

Might be a bit late but that may be clogged injectors or fuel pump issue, sounds like a fuel issue rather than an exhaust issue. I'd check your fuel pressure first before doing anything.

[@TwistedThrottleyt]

Did you end up figuring that out i have the same codes

[@calebmoran5580]

Great video!

[@Lonkines]

how did you remove the bolts that is under the manifold? I can't really reach them... :(

[@MightyMechanic]

you have to feel around with your ratchet. I had to use different lenth extentions for different bolts. also flex head ratchets really come in handy when doing this. You won't be able to see them so you have to just stick your arm down in there and decide how long of an extension you'll need. I believe I used a wrench on one of them as well.

[@Lonkines]

Yeah, it was a great pain to remove and reinstall those bolts.... it was really really bad; I don't wanna do it again unless I have engine out. However, thank you for the video and reply. It really helped!

[@MrRotary]

Thanks

[@m3llowrush]

did it fix the egr problem?

[@tiedyezero644]

While I was removing the fuel line this little part broke off and I think it was the fuel injector pressure damper

[@tiedyezero644]

This car is my daily but I’m not sure about the aftermarket part to replace it

[@las3k91]

Hey, can you write something about symptoms of clogged EGR? Can it cause stalling and dieing, but only when engine is cold?

[@las3k91]

Nevermind, EGR is removed anyway :P

[@sleepinshinigami7216]

So sad man the part I needed was the fuel rail removal

[@pulsartech2945]

Could this fix a P0420 code?

[@Jessica-mq3mm]

Christ I hope so, I have the same problem.

[@danmaynez9664]

Did it work? Just got this code

[@pulsartech2945]

Dan Maynez no my P0420 code was caused by a bad catalytic converter. From the backside it looked fine, even had proper pressure readings and such. I found an ISR exhaust locally brand new and put it on and code went away. Cut the other side of my pipe off the old cat and the material inside had started to fuse pretty bad.

[@pmagnone2488]

Came to this video to see how you got to the lower manifold bolts, wasted my time noticing you skipped it

[@longelevenandahalfdong9586]

Damico?

[@coby533]

I got a code for p0402 and I replaced my egr valve, and cleaned my throttle body and intake manifold but still have the code. Do you recommend anyrhing?

[@MightyMechanic]

Does it still run bad? Did you clear the code after replacing those parts? It may need some time to reset if you did not clear the code.

[@zetto156]

Did you ever get yours fixed? My 99 is throwing "P0402: Exhaust Gas Recirculation Flow Excessive Detected" and I don't even know where to start.

[@argentinodelavillacomerata2399]

Did you ever figure it out? Mine is doing the same thing. Runs like a champ, but don’t want to start buying the EGR valve if it’s not going to fix it

[@corytv9689]

Did you ever figure this out? I have the same code and can’t seem to figure out how to fix it as well and have been trying to research a lot too