ddawson88

My car has been running misfiring for a little while now (2 months) after I got a new engine installed. I finally decided to take it to the shop and they ran a compression test again. They said the engine was fine but I needed a tune up. They said $1041 for just a tune up!!!! I asked how much labor would cost they said around 150 so I'm just going to buy my own parts. Can someone recommend me a good tune up set or individual parts? (Coils, Plugs, Wires) Thanks in advance

ddawson88

I've seen good reviews on the BHR kit but I'm not an expert on engines nor do I have lots of money

ddawson88

Would this work?

Genuine Mazda RX 8 2004 2011 New Set of Four Ignition Coils NGK Wires | eBay

Chrishoky

iTrader: (9)

I too have been looking at tune up packages. I dont know if I would trust parts from ebay, they are known for selling knockoffs as the real thing. I would check out the vendor section here on this site, check out mazmart and mazdatrix in particular. I believe both offer packages that include plugs, coils, and wires. Keep in mind the stock coils and wires last about 30K miles, while the BHR ones should last a lifetime, and improve performance. The BHR costs $580 for all three. I think the mazmart package runs about $400 (which includes all OEM parts). As mentioned I am looking to do a tune up soon as well, and the BHR seems to make sense since I wont need to replace by coils or plugs ever again.

ddawson88

I'm torn honestly. I cannot make up my mind. I don't drive my 8 over 5k a year so 30k is a long time. 209 vs 580?

ddawson88

Saw some reviews on the coils the ebay sellers feedback.... They said they're garbage looks like I'm purchasing BHR's ignition package

Mossless

iTrader: (1)

I recently installed the BHR ignition and new plugs, and its incredible. You 'll find a lot of info about the mod and ignition health is one of the most important things for your 8. Its worth it in the long run, more reliable and I gained almost an extra 5 mpg on average. I have saved around 200$ just in gas over the past 3000 miles. Easy install and never have to worry about the coils for a while, its a win for me.

monchie

I bought a tune-up kit on eBay for $245 that includes a genuine Mazda coils, NGK plugs and wires. I paid $80 in labor cost to get it installed at a local rotary shop (Rotary Evolution). So, everything i paid is just $325 total. The car is running better than before and i redline the car once a day to take the carbon build-up away...

BigCajun

iTrader: (1)

Hello, the BHR ignition is highly recommended.
I bought the BHR midpipe, couldn't afford both, so I went with OEM ignition. Advance Auto lifetime warranty coils, 4 for $125, 4 NGK laser iridium plugs for$86, and NGK wires for $33.
Car runs great.
Btw, misfires kill cats pretty quick.
If you've been misfiring for 2 months, don't be shocked if you need a new one soon.

ddawson88

I treated myself with the BHR coils plugs and wires. It was odd though seemed to only miss at idle.

ddawson88

I was going to purchase the same thing but I read seller reviews and there was a negative review on the Mazda oem coils? Also I read in posts that they could be lower quality. I wonder how much the dealer will kill me with the install.

monchie

It's up to you to decide, i had mine installed January of this year, and the car is still running good, did i mention its running better than before...

Anyway, if you want to upgrade, then just get BHR...

Coldwound

iTrader: (1)

IMHO BHR and if you cant you need to consider if this is really the car for you.

Maintainance will get a bit costly and going the cheapest route today is gonna cost you far more tomorrow, or next week, "etc."

BigCajun

iTrader: (1)

IMHO, if one chooses to use OEM ignition parts, this in no way reflects on the suitability of this car for any individual owner.
I do my own work for the most part.
I replaced my converter, did my tuneup, and other assorted maintenance tasks.
A modicum of mechanical aptitude, a willingness to learn, and a small investment for the necessary tools is all that's required.
This is where true savings occur.

-_- just.gimme.my.ticket

autozone bruhhhh
120 for 4 coils + a 90 day warranty if your smart you can get the coils for freeeeee or new coils every 2 months
i did install my self took 10 min
cost me zero dollars

ceramic brake pads were also free for me

ddawson88

I got the BHR coils and plugs. Pricey but still cheaper than parts at the dealer. I hope I can feel a difference for the investment. But does misfiring really ruin the cat that quickly? I may invest in a used midpipe if that's the case

poacherinthezoo

If you're at 30,000 miles I bet you will feel a difference, be if from the upgraded coils or from just changing the plugs I don't know. But I know that I felt a (unexpected) difference when I did the BHR kit at 25,000 on my car. The engine felt far more willing to gain and lose rev's.

As to how many misfires kills a cat - I don't know for sure. I believe once reading that a certain number of misfires is acceptable to the ECU on the RX8? What I do know is that in my previous car (a 2000 miata) coil pack failures (which were common) and the subsequent misfires killed the cat within a few miles if you continued to drive on it.

Depending on the age of your car your cat may be replaced under warrenty - but the only way to extend the life of the cat is to take it off the car. Our cats get HOT! Over 1600 F while just steady 65 mph cruising - and the "danger zone" for damage starts around 1750 F. I frequently see temps above 1750 F if I do any "spirited" driving/runs through 1st, 2nd, and 3rd.

Personally, I'd love to be able to ditch my cat for a nice midpipe, but then I wouldn't be able to pass emissions testing.

ddawson88

Within a few miles???? I drove nearly 1k on the new engine before I took it in! It only missed during idle though and didn't drive rough?

poacherinthezoo

I'm guessing that since you don't have a CEL from the post-cat O2 sensor reading out of spec your misfires were less severe than those caused by a completely failed coil (as in the case of the miata's).

ddawson88

I did initially have a CEL within 50 miles on the new engine but it was "fixed" and didn't return

Coldwound

iTrader: (1)

Check your battery as well... I changed mine recently and it made a huge difference

tylerdurden

Rockauto.com has a full ignition for $230 if you want or need to stay OEM (like I do for warranty issues). It's a pain to install but certainly not out of the skill set of a shade tree mechanic.

monchie

Will more cranking amps help? Just curious...

Hinesmikerx8

I am very new to this form I have a question my rx8 is misfiring not all the time for the most part the higher the rpm's the more it brakes up I've changed the MAF sensor I will admit I don't know to much about the rx8 motor

-_- just.gimme.my.ticket