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Gary
Gary, ASE Certified Technician
Category: Mazda
Satisfied Customers: 878
Experience:  Senior Technician
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Mazda RX8 - the car is lagging under 2000 RPMs and engine

Customer Question

mazda RX8 - the car is lagging under 2000 RPMs and engine dies with no power. Car is fine after 2500 RPMs
Submitted: 7 months ago.
Category: Mazda
Expert:  Gary replied 7 months ago.

Hi Cinthia,

How many miles now?

Do you rev the engine now and then?, they are meant for that.

Gary

Customer: replied 7 months ago.
It's my teenagers car so I'm sure he rev's it too much. We did put in a used 60,000 mile engine about nine months ago so do not know history but seems to be working great until ONE DAY. Are you suggesting that we rev engine awhile to get it going again? Currently, we cannot keep it running because it dies.
Expert:  Gary replied 7 months ago.

Does it still have the normal power above 2500, to 7000?

It does sound more like a sudden low speed issue.

Does the engine light come on while driving?

Gary

Customer: replied 7 months ago.
The engine light is always on since we replaced engine, mechanic said to ignore. Engine and Transmission oil is fine. There was a weird smell and then the car could barely make it up a hill. It does rev normal at higher RPMs
Expert:  Gary replied 7 months ago.

No engine light should ever be ignored, since you wouldn't know if a new fault occurs.

I would find another mechanic now.

Sounds like it has a low compression rotor housing.

The engine and engine needs to be inspected for compression loss, and what codes are set.

Hope this helps.

Gary

Customer: replied 7 months ago.
Bummer, thanks. We replaced the old engine due to low compression.
Expert:  Gary replied 7 months ago.

The rotary engine is a great performance engine, but alas they have a short life.

And can't meet current emissions standard, hence why Mazda stopped production.

Hope it all works out for you.

I hope my advice has been of assistance to you.

Kind regards

Gary