Concierge Doctor

Hi,

New member and super proud member of a 2004 automatic RX8

Question?

Is it normal that during redlining, the system cuts off fuel at about 6.5K revs?

Is this a thing of automatic transmission Rx8?

Please help. Thanks.

RIWWP

iTrader: (2)

No, your fuel cut should be at 7,500rpm actual, which is somewhere around 7,900 indicated. IF you are hitting a fuel cut at 6,500, something is wrong.

Brettus

iTrader: (2)

Is it properly warmed up when this happens ?

Concierge Doctor

I think so. About 15 min drive on the expressway prior to attempting it.


What could it be?

I see the needle rise, slowly but surely to 6.5K then it drops on its own.

Anything else I could tell you to try to identify what could be wrong?

alnielsen

iTrader: (4)

What year is your car? That will determine if it is a 4 port or a 6 port engine.

Concierge Doctor

2004 automatic RX8

alnielsen

iTrader: (4)

That means you have the lower power 4 port engine. The problem wouldn't be what I was thinking it could be.

Concierge Doctor

But it means there is a problem nonetheless?
Not normal?

alnielsen

iTrader: (4)

How long have you had the car (yrs & miles)? Have you removed and inspected the spark plugs?

Concierge Doctor

I bought it a week ago 88K miles
I was planning to have it tuned up in about 500 miles after I bought it.
So if I inspected them what would be signs of health or trouble?

alnielsen

iTrader: (4)

They should be clean. The porcelain, which is white when new, should be brown. If there is one with black or wet with fuel, you would have a bad coil, ignition wire and/or plug.
It would probably be a good idea to take the car to a major autoparts store (Auto Zone Advanced Auto) and get the ecu error codes read, if you don't have access to a reader. There are error codes that don't turn on a CEL (check engine light).

Concierge Doctor

Cool. I'll check them out. Is this a known reason for a lower cutoff like I'm getting?

Concierge Doctor

Anyone else that can help?

Concierge Doctor

It does go up to 7.5K on neutral w/o cutting off