How To: EGR Removal and Cleaning for Rough Idle Fix

[Kansei]

IAC? hmm did I miss something? Does the IAC need to get cleaned often too? I don't even recall where it is haha.

 

[protegeric]

its the little plastic piece at the end of the spring. anyone out there with a wrecked protege wanna pull theirs off. please do. the IAC was way dirtier than the EGR. the IAC is right on top of the intake manifold near the throttle body. u need a tamper-proof T25 torx bit and its easy to do. but... BE CAREFUL.
once again, anyone with a junked protege, pull ur IAC off and let loveofmoney69 know. we have a seed of somethin off a tree in it right now and it works but idles funny. HA! seed mod!

so i did the egr cleaning today that went smooth but went to go clean the iac that didnt go so great. I lost a little tiny plastic piece that is at the end of the plunger inside of the iac.If you want to know i had butter fingers and it fell.parts everywhere.Need to go look for a new iac tomorrow. Plz everyone that is going to try this on there own be very careful with the iac.

 

[LordWorm]

not sure what the go is with the US version of the car, but i run mine here in australia with the EGR unplugged...i.e. it never opens. Ever. So i never ever get exhaust emmissions through my intake. evil thing it is.

ANYWAY

no CEL, no ill effects, there is probably an error code on there, havn't been stuffed plugging it into a diagnostic thingy, really couldnt be stuffed, as it works with it unplugged

 

[dstone]

The IAC is the Solenoid valve, I cleaned it before the EGR, but it made no difference in the rough idle.
Idle Air Controller (IAC), a motor-driven valve which controls intake air to maintain idle RPM in internal combustion engines
http://www.msprotege.com/forum/showpost.php?p=1797962


The EGR heats the incoming air, helps get rid of toxic gases, and makes the engine more fuel efficient.
http://en.wikipedia.org/wiki/Egr

 

[Pmpkinhead]

Have you done the EGR cleaning or are you now planning on it? Sounds like you have a vaccuum leak. Check all your intake pipes and stuff. My car did that when I busted a hose clamp on my intake. The MAF wasn't seeing any air go by because the engine was getting it's air straight from the bay.

I did it early this Summer but I may have to do it again. Saturday nite in N. Kentucky it got REALLY BAD. I will check for air leaks but how?

367 (mp3yellow

 

[loveofmoney69]

wow i had a friend with an extra IAC wooo hooo should get it on tonight wish me luck.Hey eric,Greg came through he did have an extra throttle body left . )))))))))

 

[Maxx Mazda]

Ya, IAC had more to do with bad idle than the EGR did for me...

 

[loveofmoney69]

man my car is running smooth now.MAn what would i have done with out this forum,i think i would have been totally lost.Thanks everyone,this is what the mazda family is about

 

[bazooka joe]

man my car is running smooth now.MAn what would i have done with out this forum,i think i would have been totally lost.Thanks everyone,this is what the mazda family is about

cool!

 

[bazooka joe]

over the last few days my idle has become increasingly eratic...runs about 700 then drops to almost 0..jumps up to 1k....slowly drops to 500-700..back and forth.....looks like egr cleaning tomorrow!!

cleaned the egr tonight, IAC tomorrow!

 

[BadKarma]

Cleaned my EGR before the weather got poor here, and the results were noticable.

Most prominent change would be the quieting of the idle, something I do really appreciate. Overall, things are smoother and generally improved.

Thanks for posting this Britt!

 

[urbanbiker]

Hey,

did the IAC on my car cause it was a 10 min job from off to back on. It really didn't do anything for the idle or anything. It was quite covered in carbon though. I reset the ECU after it was done as well. I'll have to try the EGR now and see what that does.

Matt

 

[Kansei]

I think it's time for me to do the EGR cleaning before it gets too cold in the garage. My idle hasn't been the smoothest lately, of course with the AWR front motor mount it only makes it worse

 

[bazooka joe]

cleaned the egr the other day, honestly i was surprised how clean in was...there wasn't any carbon on the spring/plunger...IAC tomorrow...of course i can't test anything till i get my newly repaired and ceramic coated MAM mani back next week!! i can't wait to get back in my car...it's been about a month now and it's killing me to not be able to drive it!!(pissed)

hey chris, would you be interested in my MPI? i'm going FMU and voltage clamp soon...just asking...

 

[Kansei]

I've never really looked into the MPI.. is it a standalone?

 

[bazooka joe]

I've never really looked into the MPI.. is it a standalone?

no, piggy back...controls fuel and timing...it works, just a bear to tune with an auto...and i'm not running mad psi so the fmu and clamp will do me fine...just and fyi..stand alone is major bucks $$$

 

[Kansei]

not for megasquirt+EDIS

 

[bazooka joe]

bruce cleaned my IAC (it was all carboned up11) today reinstalled it and the egr...got my new mani on reinstalled all the crap and after a few cranks...started up and ran well! took her for a ride and realized i forgot to tighten down a cold pipe..the blow off valve opened and bam off came the pipe...well needless to say it did run to well...limped home tightened her up....nice an smooth baby!!
if your having idle problems don't forget the IAC...!​

 

[red95_240sx]

what is the IAC. i have a 1.6l. wheni crank it, the idles bounces and stumbles like the engine is gonna die and it corrects itself. thenonce i put it in gear, the ca rolls for a while and dies.

 

[jeswin12]

On Step 7, what is the PCM and how will you reset it?

Also, what is IAC and how to clean it?