I have an '09 R3 with 48k, and I know a lot of members suggest that coils, wires and plugs need to be replaced on regular basis ~30k (miles). As a result I replaced the coils at a dealership and an order was placed for ignition wires. I was thinking of changing the plugs as well soon.

However, after the coils were changed the car starts little weird, I can upload a video, and from 3-5k rpms I can feel 10-15hp loss of power.

Any ideas what might be the case?

 

You have an accurate butt dyno lol, my best guess is that the wires aren't fully connected.

 

Recheck all of the connections. Make sure everything is bolted down to the required torque and leading to the correct coil/plug, and make sure all wires are snug (hear a click).

 

what specs do the coils need to be bolted down to i just tightened them till i couldnt manually turn it anymore.

Having power loss issues as well after 5k and weird screaming noise check it out

https://www.rx8club.com/rx-8-discuss...cluded-245758/

Sorry for the threadjack Filip could i thought we could be having the same issues.

 

^ We can't help you any further until you take a look at your cat

 

Is "a dealership" a Mazda dealership? If not, make sure the wires are ordered correctly L1T1L2T2. Also make sure the spark plugs are tightened all the way (as much as you can by hand, then a 1/4 - 1/2 turn (this is very important ... i had a lot of power issues when my spark plugs werent torqued down ... they will back themselves out slowly)

 

Alright ill have a look as soon as i can. Just havent had time lol.

 

From the video, the sound is most definitely the Cat.

 

Thanks bro. Im gonna gut it soon or i find a midpipe i might just swap it.

Quick question .. when you gutted yours im assuming it through a CEL right ??

And emissions wont be passed with it gutted ?

 

OMG! You are not gonna believe it. I opened the hood to check everything and they forgot to put on coil. So there is only 3 connected. And yes paimon.soror, I did it at Westowne Mazda (427/dundas).

Now, I'm not really good with mechanics, but is it ok to drive it like that to the dealership which is like 8km away from my house?

 

One*

 

What isn't connected on the 4th? If it's at the wiring harness end, then yes, technically you can, although it's not great for the engine.

If it's a plug wire not connected, the coil will fry fast. Give them a call first.

Either way, both are REALLY easy to connect.