jorlanjm

So I noticed that every once in a while when I do a complete stop my 2010 RX-8, the idle will bog down to 750 RPM for about a second and then back to normal 800-900 RPM.

Is this is normal?

9krpmrx8

iTrader: (46)

Yes, typically. Might have a slight vacuum leak.

Loki

iTrader: (1)

Especially with A/C on, it's common. It's caused by the A/C compressor kicking on.

Shceagle

Sorry guys, need some help, been through a bunch of the forrums and searched google, I have a 09 rx8 and when I got about 6k rpm I get gas and oil coming back out through the tb, have already replaced plugs,could,wires,and the maf sensor, reset the ecu cleaned connectors and checked vacuum lines, the only thing i can think of now is the ssv or carbon build up

Loki

iTrader: (1)

You can start your own thread, you know
It's not any of those things. It sounds like excess blowby, you're looking at a new engine.

Fortunately, an 09 might still be under engine warranty (8 years/100,000 miles) depending of exact date of purchase. Call Mazda.

Danieljjvv

i Know mine idled so low when my compression was low,felt like it was about to stall itself.

Reoze

I guess I'll add my two cents. This is pretty normal with the A/C on as mentioned before. What I did notice was that when my motor mounts were busted this was a lot more pronounced. Car never stalled but it would give every indication it was considering it. After the new mounts everything has been smooth.