JapCarForum General Discussions The JCF Lounge Mazda RX8 Engine issue.. any thoughts ?

Mazda RX8 Engine issue.. any thoughts ?

Mazda RX8 Engine issue.. any thoughts ?

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BOOSST
Banned
1,080
08-06-2018, 01:36 AM
#1
My mate has a 2004 Mazda RX8. It is the 231bhp model, but he had the engine replaced with a 192bhp a while back. Clock currently shows 37000miles.

However, recently he has had problems with the engine cutting out when in neutral. he cannot sadly verify what milage the 192bhp engine had on it so he doesn't know if he needs another new engine or if this is a common fault thats occurring ?

Anyone got experience of the RX8's and maybe have some answers.. all the garages he has gone to want investigate , investigate, investigate and at a cost !
BOOSST
08-06-2018, 01:36 AM #1

My mate has a 2004 Mazda RX8. It is the 231bhp model, but he had the engine replaced with a 192bhp a while back. Clock currently shows 37000miles.

However, recently he has had problems with the engine cutting out when in neutral. he cannot sadly verify what milage the 192bhp engine had on it so he doesn't know if he needs another new engine or if this is a common fault thats occurring ?

Anyone got experience of the RX8's and maybe have some answers.. all the garages he has gone to want investigate , investigate, investigate and at a cost !

Stoney
Posting Freak
2,117
08-06-2018, 02:36 AM
#2
Fitting an engine of unknown mileage or history is never a good idea! Though I expect you know that. Especially on these engines, as they need fully rebuilding with new internal parts, IIRC, at specific intervals.

Not sure why it would stall in neutral? Do you mean it stalls at idle? If you pop it in neutral and rev it, will it still stall? Does it need to be left in neutral for a while?

If I had a problem with my RX8 (or RX7 for that matter) I would look up the number for Dragon Performance and give them a call. Friendly helpful guys and I believe the UKs leading RX7/8 specialists.

[Image: tempsig2.jpg]
Confusedad: It was a tough call to make, but the Supercharged IS200 is being retired. Confusedad:
Stoney
08-06-2018, 02:36 AM #2

Fitting an engine of unknown mileage or history is never a good idea! Though I expect you know that. Especially on these engines, as they need fully rebuilding with new internal parts, IIRC, at specific intervals.

Not sure why it would stall in neutral? Do you mean it stalls at idle? If you pop it in neutral and rev it, will it still stall? Does it need to be left in neutral for a while?

If I had a problem with my RX8 (or RX7 for that matter) I would look up the number for Dragon Performance and give them a call. Friendly helpful guys and I believe the UKs leading RX7/8 specialists.


[Image: tempsig2.jpg]
Confusedad: It was a tough call to make, but the Supercharged IS200 is being retired. Confusedad:

Chri5
Posting Freak
1,894
08-06-2018, 04:13 AM
#3
Does it do this when hot or cold???
Has it done it since new engine fitted???
Could be an idle control valve either not working or not connected.

I would do either as stoner said and call Dragon Performance or Haywards Rotary
I would also go on rx8ownersclub.co.uk and look in the technical forum.
Chri5
08-06-2018, 04:13 AM #3

Does it do this when hot or cold???
Has it done it since new engine fitted???
Could be an idle control valve either not working or not connected.

I would do either as stoner said and call Dragon Performance or Haywards Rotary
I would also go on rx8ownersclub.co.uk and look in the technical forum.

Lexusboy
Posting Freak
9,267
08-06-2018, 04:51 AM
#4
There were six models 231 bhp from the
Nemesis
Kuro
Evolve
PZ
40th Anniversary
R3
Each one had a different finish.
I think Bobby has the PZ This is the pro1ex model.
It you were changing engine then ideally it should be like for like.
Would the car benefit from a tuning session it maybe running to rich, but without further info it very hard to tell.

There are a few common problems with these
the cats had build up problems this could also be a problem.
Oil and water needs to be change at correct timings.
I think the plugs are another problem as they do break down.
They are known to drink lots of oil and it said that you should every month redline them.

Hope you get to the bottom of this
Lexusboy
08-06-2018, 04:51 AM #4

There were six models 231 bhp from the
Nemesis
Kuro
Evolve
PZ
40th Anniversary
R3
Each one had a different finish.
I think Bobby has the PZ This is the pro1ex model.
It you were changing engine then ideally it should be like for like.
Would the car benefit from a tuning session it maybe running to rich, but without further info it very hard to tell.

There are a few common problems with these
the cats had build up problems this could also be a problem.
Oil and water needs to be change at correct timings.
I think the plugs are another problem as they do break down.
They are known to drink lots of oil and it said that you should every month redline them.

Hope you get to the bottom of this

Stoney
Posting Freak
2,117
08-06-2018, 06:56 AM
#5
Lexusboy pro1ex model.

Yeah, in Dave's dreams!!!

*Prodrive.

[Image: tempsig2.jpg]
Confusedad: It was a tough call to make, but the Supercharged IS200 is being retired. Confusedad:
Stoney
08-06-2018, 06:56 AM #5

Lexusboy pro1ex model.

Yeah, in Dave's dreams!!!

*Prodrive.


[Image: tempsig2.jpg]
Confusedad: It was a tough call to make, but the Supercharged IS200 is being retired. Confusedad:

Lexusboy
Posting Freak
9,267
08-06-2018, 07:08 AM
#6
Well spotted :biggrin:
Lexusboy
08-06-2018, 07:08 AM #6

Well spotted :biggrin:

Stoney
Posting Freak
2,117
08-06-2018, 07:16 AM
#7
Lexusboy Well spotted :biggrin:

You did that on purpose, right? What do I win?

Who's idea was it to remove what is essentially the top of the range engine, and replace it with the basic spec one? TERRIBLE idea.

[Image: tempsig2.jpg]
Confusedad: It was a tough call to make, but the Supercharged IS200 is being retired. Confusedad:
Stoney
08-06-2018, 07:16 AM #7

Lexusboy Well spotted :biggrin:

You did that on purpose, right? What do I win?

Who's idea was it to remove what is essentially the top of the range engine, and replace it with the basic spec one? TERRIBLE idea.


[Image: tempsig2.jpg]
Confusedad: It was a tough call to make, but the Supercharged IS200 is being retired. Confusedad:

FirebirdPhil
Posting Freak
7,101
08-06-2018, 07:21 AM
#8
Was there not an issue with stalling with the 231bhp engine, when moved only a few feet and turned off, something about the engine flooding. This could be part of the same issue, only because its a swap the ECU's may not be operating properly.
Edited 20-07-2011, 04:56 PM by FirebirdPhil.

"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
FirebirdPhil
08-06-2018, 07:21 AM #8

Was there not an issue with stalling with the 231bhp engine, when moved only a few feet and turned off, something about the engine flooding. This could be part of the same issue, only because its a swap the ECU's may not be operating properly.


"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"

Lexusboy
Posting Freak
9,267
08-06-2018, 07:44 AM
#9
Phil that true about the engine stalling but i think it was only when the engine was cold
Edited 20-07-2011, 05:19 PM by Lexusboy.
Lexusboy
08-06-2018, 07:44 AM #9

Phil that true about the engine stalling but i think it was only when the engine was cold

Chri5
Posting Freak
1,894
08-06-2018, 08:01 AM
#10
The engines are very prone to flooding when switched off when cold.
They say to rev the engine and hold it 4krpm for 10seconds before switching off.
But this isn't flooding it's stalling so presumably will restart???
If it floods it's a pain in the rear unlike just a hassle with a piston engine.
Chri5
08-06-2018, 08:01 AM #10

The engines are very prone to flooding when switched off when cold.
They say to rev the engine and hold it 4krpm for 10seconds before switching off.
But this isn't flooding it's stalling so presumably will restart???
If it floods it's a pain in the rear unlike just a hassle with a piston engine.

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