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Spark Plug change on RX8

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Old 04-29-2017, 06:18 PM
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Spark Plug change on RX8

Its been a while since I worked in my own car since I got rid of my RX7...Now that I have an RX8 i want to work on it as much as I can...

On the RX7 when i change new plugs and check timmings i usually turn the crank angle sensor to correct timmings.

On the RX8 i heard you dont have to do this anymore and it auto corrects itself...then theres one says I have to reset the Crank sensor by pumping the brake 20 times.

Whats the next actual step after replacing plugs before i start the car?
Old 04-29-2017, 06:22 PM
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Replace spark plugs. Start the car. That's about it.
You can do the 20 brake pedal reset any time, it's not really warranted by spark plug changes. If you change the sensor or the engine then you need it.
Old 04-29-2017, 06:23 PM
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You had an FC? 😎

Anyway......change plugs...start car. You can reset profile and ecu if you want but it isn't necessary
Old 04-29-2017, 06:37 PM
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Originally Posted by dannobre
You had an FC? 😎

Anyway......change plugs...start car. You can reset profile and ecu if you want but it isn't necessary
Yeah I had a 1990 GXL RX-7...got it with 90,000 miles back in 2000...Got rid of it back in 2012 due to crack's on the bottom frame and it was deemed a safety hazard on the road, they wouldnt wel it anymore cause they said its already compramised the integrety of the chassis...it had 251,000 miles and it was still running...i cried i got rid of it 🙁...I drove a 2004 Corolla, which just became an point A to B car, after that and actualy got a 2016 PRIUS for about 6 months before i decided to trade it in then got my 2010 RX8 GT back in October last year!

So with the RX8 just change the plugs and drive it pretty much? thats actually kinda cool...i dont have to bust out my timing light, not even sure if the darn thins still works LOL.
Old 04-29-2017, 10:19 PM
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Simple as that. Just swap 'em out.

But I'd recommend doing coils and wires at the same time, because a weak point in one affects the other...
Old 04-29-2017, 11:29 PM
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good idea...but i was told by the Dealer that the Series 2 Coils are an updated version from series 1...so thats not the case?

i know its not the Rev C version but should be more durable than series 1 coils right?

and on that note where do i get Rev C Coils?. I kinda want to stay close to OEM

Last edited by jorlanjm; 04-29-2017 at 11:34 PM.
Old 04-30-2017, 01:05 AM
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At the very least, test your coils and wires.

But it's your engine.

Mazmart has the updated
Old 04-30-2017, 02:22 AM
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Originally Posted by RX8Soldier
At the very least, test your coils and wires.

But it's your engine.

Mazmart has the updated
Thank you...the Rev C Coils is just a direct replacement correct?...not bad i can order a whole Tune up set from Mazmart as well...cool
Old 04-30-2017, 08:51 AM
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Correct. Plan on replacing/checking the coils every 25k. The series 2 /Rev C are better, but **** happens.
Old 04-30-2017, 05:06 PM
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You have a number of options for coils:
- The Cheapest option: BWD/Intermotor coils from auto parts stores like Advance Auto. 4 coils, 4 plugs, and 4 wires can be had for around $190-220 total based on whatever promotion is running at the time, shipped to your door for free. They are considered to be the first coil revision and you should expect to need to replace them around 20,000 miles, 30,000 miles max. They often come with a "lifetime warranty" by the auto parts store, which could potentially be leveraged for perpetually new coils.

- The Best Upgrade:
The BHR ignition coil upgrade can be had for around $500, which eliminates the need to continue replacing coils periodically, as well as deliverying a significantly stronger spark for minor mileage and power gains. It is a proven kit with top notch customer service supporting it. It includes the wires, you still need to add plugs ($80)

- The For-Sure OEM:
Mazmart sells all 4 coils of the latest OEM coil revision (C) for around $250, (just the coils, you still need to add plugs and wires) Supported by top notch customer service. They will likely last longer than 30,000 miles, but we don't have much solid data on how long the latest coil revision will last.

- The Most Expensive option: Buying from a dealer will run you around $300+ for the coils, $500+ for coils, wires and plugs, and if you have them do the install, expect to get a bill for anywhere from $700 to $1,800. You may not get the latest coil revision. Yes, you are getting shafted if you take this option, so bring lube.

- The Highest Risk option: Ebay coils continue to pop up as counterfeit, mislabeled, dead on arrival, and have zero post-purchase support largely. They are the "cheapest" listed price, but when you add that $92 or whatever to the price of anything in the list above from having to do it over again, you can see that they are no longer the cheapest option. Do it right the first time. "Motor King" coils are popping up at an attractive price on Ebay, but are being proven as ineffective, to the point of being unable to get the engine fired. "Mazda" branded coils on ebay are almost always counterfeit. Check the seller's name though, since some of our vendors sell legitimate coils there. The price will be $200+ though. Anything sold as "Mazda OEM" under ~$26 per coil should really be considered as suspect and probably counterfeit.

Be wary of "LSx D585 coil upgrades", as not all D585 coils are created the same, and the standard generic D585 coil is not properly designed internally for the RX-8's ignition needs. They generally "work", but there are anomalies and performance issues that have to be solved, if they can be solved. Definitely NOT a plug and play option, even if it is advertised as "plug and play"

SakeBomb Garage IGN-1A Ignition Coil Kit
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