Comments on: 2004 Mazda MPV Stalling and Rough Idle: Replacing the Idle Air Control (IAC) Valve

By: mazdampv

mazdampv — Wed, 30 Jun 2010 23:44:46 +0000

Thanks for your post and I pray all of you, this is very use full discussion. I bought the mpv last week and start spending $$
my life become hell and now i stopped spending $$ and start review the answers. all are really good advices. thanks buddy.
i will try all my self step by step.

By: Jacob Hammond

Jacob Hammond — Fri, 18 Jun 2010 16:11:27 +0000

Ross, I’m not 100% sure what the exact code is, but I’d definitely guess a misfire code would be the one.

By: Ross

Ross — Fri, 18 Jun 2010 12:57:57 +0000

My ‘01 MPV is having similar issues. The coil pack you guys are talking about, could that throw a code for a misfire?

By: BlackhawksFan

BlackhawksFan — Wed, 16 Jun 2010 01:36:20 +0000

Dead on. I had the same issue and brought it to the dealership, they replaceed the PCV Hose and nothing changed, I told then about the IAC valve. They Checked it and Yup that was the issue.

Thanks for the help!!!

By: Stuart Patterson

Stuart Patterson — Mon, 17 May 2010 14:09:38 +0000

Thank you so much for this post. I was having the same stalling problems described by most and I wasn’t looking forward to long drawn out repair cycle with the local dealer for this intermittent problem that had been getting worse. The day before I found this post our MPV had stalled 3 times during an 8 mile city-driving run. I already had most (if not all) of the coils replaced over the last 18 month period, so I was glad to read that this could be something other than more coil problems.
I bought the suggested replacement valve from Autozone and installed it myself. It really is as easy as described. It has been about 5 days now since the repair and so far my 2004 MPV seems to running great with no stalls. It might be my imagination, but it seems to be running smoother with more pick-up than before the repair. My only concern with the Duralast part is that the gasket that came with the valve (which I did install) is not flush with the interior openings in the valve. The OEM gasket that removed had cut outs that exactly matched the shaped of the opening. Could this be a problem? Should I have re-used the old gasket?
Thanks again to all.

By: Jth

Jth — Wed, 12 May 2010 01:11:45 +0000

Thanks to the OP – Awesome Post !!!

My car: 2006 MPV LX (v6)

Problem: Stalling at low idle, stopping.

Tried:
1) MAS Cleaner (nope) – tech said not to mess with the mass air sensor as it is fragile and expensive.

2) Battery swap test ( thought it might be weak battery) (nope).

3) Used throttle body cleaner to clean throttle body ( after removing air cleaner assembly) (nope).

4) Used throttle body cleaner (and q-tip swabs to clean out black carbon deposits in Ilde Air Control Valve) (worked!) No more stalling.

Using the cleaner alone didn’t seem to do it so I used q-tip swabs to clean off the depoits off the parts inside the two chambers of the IAR. Paying special attention to cleaning the steel pin running from the valve through both chambers. Alot of black gunk came off on the swabs when the chambers didn’t look that fouled up begin with. Do a thorough job here so you get as much black onto the swabs as possible being careful to not damage the rubber seal in the one chamber.

Worked brilliantly and super simple to do. Original IAR gasket was dry and reuseable.
Glad the cleaning worked as it took 15 minutes and saved me the cost of a new IAR ($69 at autozone). Note: other stores could not find it under “IAR” and the like but found the Duralast part referenced earlier in this thread.

Thanks a million for saving me some time and coin!!!

By: Jacob Hammond

Jacob Hammond — Fri, 07 May 2010 18:05:41 +0000

Random misfile on load is a coil issue. The second time I had a coil failure, it was two coils failing at once, so it could be that you have more than one failing. My approach was to simply replace them all.

By: Kevinj

Kevinj — Fri, 07 May 2010 17:42:50 +0000

What if the van have a random misfire when on load? When go up a hill, it stalls and check engine came on. I took to my mechanic to do code scan each time the check engine lightcame on and each time he scaned a differend cylinder # is misfired. Yet it runs fine after afew stall and the engine light came on. Is this part of the iac or the coil? My mechanic recommend to change the booth of those misfired. All 6 sparks plug changed within 3 months. Any suggestion?

By: Kenny Clyde

Kenny Clyde — Mon, 03 May 2010 17:18:41 +0000

I have a 2003 MPV that has had the coils exchanged, not it is running hot while ideling, and the air conditioning gets warm, once I get some speed, it cools. Any help needed, not a lot of money to spend on repairs.

By: Eric Pistek

Eric Pistek — Mon, 19 Apr 2010 17:58:53 +0000

Hello

Thanks for your very helpful info. This part was at O’Reillys for $63.66. Sorry ’bout the $ grand you spent, I pray that GOD will bless you ten fold. You are like no other, thanks.

Eric