Footman

iTrader: (2)

Has anyone had the MIAC sound above 6k?

https://www.rx8club.com/rx-8-discussion-3/please-help-potential-new-owner-question-miac-181950/page4/

I have had it for awhile. I know the fix, I have the part, but I can't do it. I tried already.

Has anyone performed the orifice installation successfully and could give me a hand?

Footman

iTrader: (2)

Really? I'm surprised I am the only person in GTA with this issue

rx8-druggist

I had this problem since I got my series II in 09 - but just didnt bother to fix it lol. The dealer was no help and I just learned to live with it. It is kinda annoying tho... if you have a MIAC fix meet I'd come and watch :P

wcs

iTrader: (2)

Hey Footman.
If you wanna make the trip to Orangeville I don't mind giving you a hand.

I've never done it, dunna if I can, but I've got a heated garage to work in.

Just extending the offer.

Kafka

Based on the thread you posted, this problem usually came up for winter driving Rx8s?

Anytime afterwork during weeknights...I can come by for coffee and moral support :P

Maybe you can ask Al to lend you a spot in the shop and we can all meet up there (I think thats closer to Orangeville?).

Let me know.

wcs

iTrader: (2)

Mmm I don't where Al's shop is ... huh

Well I'm in for whatever, I'm not traveling right now soooOOoo I'm good.

Neo

I think Al's shop is by my area (Aurora)

I wouldn't mind getting some time to do a small wiring job regarding some LED lighting on my Miata.
Anyone up for that?

Footman

iTrader: (2)

THanks everyone for your kind offers...

Mars stepped up over the weekend to help me out and it's now done. First of all, the procedure itself is very simple, but due to the space constraints, it was a very difficult task for 1 person to do. At one point in time, one had to simultaneously plug the coolant hole on the engine block, hold the hose in a straight position, fit the orifice into the hose and also stuff it down... I don't know how some of the others on the forum could do it themselves, but I found that I needed at least a second set of hands to do the work.

Also, strangely enough, Mars was saying that I wasn't breathing at all when I was exerting force trying to get that damn spring clamp off and trying to pull the hose off. That contributed to me feeling light headed, and nauseated. I almost puked doing this job. I had to sit out for awhile to feel better, drank some hot water, and I also lost my appetite for dinner.

Another interesting revelation, as I had tried to do this prior task by putting the orifice into the other side of hose where it enters the firewall. I noted that it was impossible to put it in because the inner diameter of the hose was much smaller than the diameter of the orifice. I had thought that because the hose is identical at both ends, it would be the same case, but as it turns out it is not. The hose at the engine block side has a wider inner diameter! The orifice just fits in there perfectly. The only other trouble is because the hose is bent in that area, one has to apply enough force to straighten the hose first before trying to stuff it down with the back of a socket wrench.

Now for the all important info.... and I am pleased to announce that so far it has significantly reduced if not eliminated the MIAC sounds. Mars was riding shotgun and she says she could hear an extremely faint sand nose. This is with no audio, and no vent fan on, and all windows up. And for once, sitting at the drivers side, I could not hear anything.

To test this, I had driven the car up DVP on cruise at 8000 rpm for about 15-20 minutes. Occassionally giving the throttle a stab up to fuel cut off. A day later, I did some aggressive driving at WOT going up from 5k towards redline and I have not heard the noise at all.

Thanks again to Mars, and to those that have offered to help. I will keep monitoring and if you don't hear me writing anything back, that means it's a definite cure for me. For now, it's a success!

paimon.soror

iTrader: (15)

I have been following this thread for a bit and read up on a lot of the older threads and it seems that there are two common questions that haven't really been answered.

1. Is there any harm in letting it just be as it is?

2. Does this affect engine cooling.

Footman

iTrader: (2)

No it does not affect engine cooling. I had monitored my coolant temps throughout the weekend. They were exactly the same as before.

Meaning....

Constant cruise engine maintains 82 C...
Between stop and go traffic, it would peak out at 98 C before the fans start coming on. The fans shut off at 91 C.

No changes from before.


There is no harm in letting it just be. It is all for noise. It bothered me because it really sounded like *** when you're trying to rip it to 9k. I bought the car to expect it to run it there and be a rewarding drive. I shouldn't have to wince at the nasty sound everytime I get up there in the RPM's, hence I did it.

If you have the MIAC noise, it does not harm your car.

Mazda_RX804

can u describe this noise? is is a high pitch whistle? That what i kinda hear from my car sometimes.

R.P.M.

iTrader: (1)

Wait.....what? You forgot to breath?





What??

Rotary-RX8

iTrader: (1)

for those who dont know. MIAC = marbles in a can

Footman

iTrader: (2)

Mike if you watch the video clip in the first page of the link you will hear it. The noise comes from the glove box. Don't be paranoid if you don't hear it don't go looking for it to pysche you out.

nate340

i've never had miac until i put my 3rd engine in. how much did the little pellet end up costing? if its not excessively expensive ill replace it it doesn't bother me that much.

Footman

iTrader: (2)

The part costs < $10 at dealership. I don't remember the exact price.