I know that. I was stating that is all I have done. I just replaced my ignition coils and my battery. Nothing was plugged in wrong. I know some people have swapped terminals on accident. I'm just frustrated.

Help, im facing this problem too, what has immobilizer has to do with changing ignition coil pack? i just dont get it. checked all fuses, all still good, checked ignition ground is good too.

but the immobilizer light keep flashing hence cant start the car.. Help anyone?

Look closely at your engine fuse.
I shorted a wire against thw engine lift bracket and popped it, wasn't obvious at first.

Same thing happened to me when I installed a BHR coil kit.

Sorry for the question that im about to ask, i just want to be 100% sure, where is the Engine fuse located? If possible, a pic please.

Pardon my ignorance, senior!

First thing to check is ALL the fuses. Not just a quick eyeball - use a tester and do each one.

The computer fuses are in the driver footwell fuse box.

Until they are all proven good, you are just spinning your wheels.

Senior, mine's a Right-hand drive. where would it be? thank u.

Still in your footwell.

A little curvy panel on the door frame, below the trunk button.

I will find it and i will change it.

Thank u so much senior! Im PUMPED!!!

ok, it's at the engine bay, lol. i changed it, and it snapped again and again and again. what could go wrong? i disconnected the coils just to test and it snapped too.. is it definitely a bad/weak ground or any other problem? PS : i cleaned the ground and the body too.

Hey Charles,

No it's not the coils, took off all 4 connectors to the coil and tried to on it(without coils), and snapped, there goes the 15a engine fuse again. it must be an old bad ground. hunting it down.

Hope i find it quick. cant wait to drive it with new coils!

ok i will recheck all 4 harness and supply wire.

Thanks for the heads up!

Look closely at the connector harnesses, they can be rubbing against something or pinched somewhere.
If you didn't have the issue before the work you did, then it's likely related to what you worked on.
Retrace your steps of everything you did and inspect closely before looking at other things.
It could be a coincidence, but I doubt it.

All 4 connector harnesses are clean and good. still looking.. getting tired but this is my dream car since it came out, so i wont give up lol. dang im too invested!

Update!
Car is up and running, turns out the ECU is corroded or somesort and had someone fixed it, but new problem arises

AC blower not blowing (Display on, AC Compressor on but no air blowing out, no current is flowing to the blower motor)
EPS (Cleaned everything but it doesnt goes off, decided to open the module and see, doesnt look good, some what corroded or been serviced before(solder marks))

Are they connected in somewhat? meaning the EPS module got something to do with the AC blower?

But the car has no more misfires and revs up to 9k like a champ, BHR FTW!

I'm guessing you still haven't checked all the fuses.
I give up.

Whoops
 

Hey y'all, I hate to ask but I've read this thread (as well as others on the same issue) at least 30 times over, and I still can't seem go boot the rx8 back up. So I was removing my UIM last weekend and I pulled one of the biggest rookie mistakes and through my battery in backwards. Unfortunately it now won't start. So here's what I've noticed

The 120a main fuse works SOMETIMES. When it is NOT working, my windows, a.c., radio and power seats all work. At this point the immobilizer is flashing rapidly

when the fuse IS working, I'm getting no power to the Windows or to anything else. I have power to all my the lights on my cluster. At this point the immobilizer is off but it still won't start.

what I've noticed to is that the fuel pump doesn't prime, nor does it crank when the fuse IS working and when it is NOT working. I'm getting no clicks or anything from it as well.

if anyone has any suggestions lemme know. Again sorry for reviving an almost 3 year old threat

Marshall.

and through my battery in backwards.

That's usually fatal.

If the main ECU sees reverse power, it usually smokes.

Your only hope is that the BTN or Room fuses blew and saved your ass.

Otherwise....

Fuel pump wont prime or run
 

Fault log report generated by Torque for Android
=================================================

Vehicle VIN: JM1FE173240119143
Vehicle Manufacturer: Mazda
Vehicle Calibration ID: N3Z2EU00013H6020

Current Fault Log
------------------
ECU reports no current faults

Pending Fault Log
------------------
ECU reports no pending faults

Historic Fault Log
------------------
ECU reports no historic faults
Other discovered fault codes
(possibly pending, current or manufacturer specific)
----------------------------------------------------
P0610: Control Module Vehicle Options Error
U1900: Unknown code - More information may be available on the web

End of report.

Well the immobilizer is blinking slow i have the original keys and the original computer in the car i did put my back-up engine in my car and now the fuel pump wont prime when i turn the key on it was fine before i swapped engines. The fuses and the power and ground are fine i checked that first but let me add that the car was down for 3 years with no motor or computer im at a loss for what it could be.

"down for 3 years with no motor or computer"
If you switched you're ECU to the other car's ECU and not the one original one that came with the car and the keys, The new ECU is going to be looking for the other cars key chip, not the original one which is for the car. I had a problem kinda like this, I took the receiver off from around where you put the key in and taped it under the dash with the old key taped into the hole so the car will read the old cars chip in the key but you can still use the original key that fits the steering column.

Most likely it's not you're keys and it's the receiver that reads the key. It could have maybe gone bad and needs replacement

I googled "rx8 key antenna" to find more.
https://www.rx8club.com/series-i-tro...cation-165856/

https://cimg8.ibsrv.net/gimg/www.rx8...18f5ec84c1.jpg

I thank you very much @thebubbadog