I have read conflicting posts as to whether to idle at 3000 rpm for 10 seconds before turning off car every time, or only when car is cold. I am curious what others are doing.

i thought it was 4000?

My saleswpman mentioned this to me during the sale but never said anything about the flooding thing.

I'm not worried about it as I have never flooded it in 3000 miles so....

I never do it. My car flooded once, after my wife moved it 30 feet and shut it down. It's been very cold here and my garage is running about 20F. The car starts every time like a champ, but I've been very careful to shut it off only when the engine temperature gauge is in the middle.

The ECU has maps for fuel enrichment when it needs it. No user intervention required.

Rev to 4000 before every shut off, hot or stone cold.

Never flooded.

And right now the stones are VERY cold - minus 44* tonight.
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doc

I was told by my salesperson to do the following when it hasn't fully warmed up:
- Rev to 3000 (no mentoin of 10 seconds)
- Turn off and release accelerator at the same time

When he gave me the once over on the car it was 16 degrees F. We started it, he talked me through things, we then shutdown using the above procedure. I don't recall if it was warm at that point. Soon after we restarted and took it for test drive.

Three days later I have 300+ miles in -5 to +20 F weather, and its running good with 17" snows and starting fine. I haven't need to shut it down cold since I got it.

Whether hot or cold i usually rev it up to 5k and shut it off little habit i picked up driving my dads old car, it would foul the injectors if i didn't do it.

Is there any hazard or downside to revving as you shut down? Do you let off the gas simultaneously with turning off the key, or keep the gas in?

It is totally irrelevant WHAT your foot does after the ignition is off, the drive-by-wire throttle is already shut.
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doc

3000 when cold, doin as told from dealer...no flood

I have always revved my modern (computer controlled fuel-injected) vehicles up to 3-4k and killed the ignition while holding that RPM for a second or two. My Miata's borla always sounded so damn good in the garage when I goosed the throttle a few times and shut her down mid 'growl' :P.

When I heard about the 8 running rich and the flooding potential, this seemed like a more than helpful habit to continue with the rotary. FWIW, haven't had a flood yet, nor even a start that took more than a couple revolutions of the starter, which has included some pretty cold starts (-22C/-8F).


BTW, Great avatar Doctorr...

Yeah, doctorr.... very cool avatar. Took me a second to figure out what it was, but nice job. :)

The answer is in the manual. Just going by memory I thought you only do it on short drives, otherwise let it idle.

Have yet to idle the car to 3000 before shutdown. No floods.

I idle her for about 2 seconds when she's warm at 3.5k and I idle her for at least 10 seconds at 3.5k when she's cold before I shut her down.

When I move the 8 out of the garage to wash, I rev it up to 4k and switch off while it's still revving. This procedure was recommended by someone in another thread. Apparently this should expel any unburnt gas from the chambers. Otherwise I never rev it up before shut down. No problem so far.

once I didn't do it and it took a few extra revs of the starter to start back up. So just to be on the safe side, I'm doin it

I rev 3K once and when it reaches the peak I turn the key off. I have noticed more people with performance engines do this too. Like that Saleen Mustang in school that parks close to me. I could hear a high rev before the engine stops.

I do it all the time, cold or warm. It has become a habit of mine ever since I read it here. I did it while I still had my Solara. And now, there's never a time that I don't do it on my 8.

When starting cold and only moving a short way (like out of the garage to wash her) I let her idle for a few minutes until she's warmed up completely before shutting her down. I'll rev her a few times before turning her off, but I won't turn her off as I'm revving; I just let the tach return to normal idle then turn off the key.

I have never had a flooding or starting problem. I don't know why this is so difficult an issue for so many 8 owners... just don't turn the car off if it's not warmed up! Is idling it for a few minutes too great an inconvenience?

My baby has 3,800 miles on the odometer.

The shortest distance I've ever driven the car cold is about a mile. I've never just moved the car out of the garage cold and turned it off. In addition, I'm not trusting this car with airport (or any other) valet parkers.

My engine has never flooded (knock on wood).

And I've never revved the engine before shutting it down. This thread is the first I've heard that you were supposed to do it. I'll keep it in mind if I ever do have to shut down the engine while cold.

When I bought my car at the end of July, and they had only been out for a week, I knew more about the car than the salesman. So, I wasn't informed of anything related to this. This is my first time hearing this story.

I always rev to 3000 hot or cold before shut down. No problems yet.

The people revving to 3K before every single shutdown must also be the people getting 12-15 MPG!

so should you turn it off while its revving to 3000RPM or let it drop to normal RPM before shutting down? i personally let it drop down before shutting it off when i do rev it. most of the time i just shut it off without revving at all but its wamred up of course.

you are supposed to shut it off at 3k rpms. The idea is that once the car is turned off the fuel will stop going in but the engine will still turn for a little while from momentum. That expels any extra fuel that would cause flooding. I only rev mine up to 3k and shut it off when it is cold. An i get around 20mpg, but drive it conservatively until the weekends.

The dealer (whom I would think I know more about the car then he) told me to rev to 3000 and then shut down every time-warm or cold. Seems logical esp from all the threads I've read on our forum. This will not only get the excess fuel out, but provide a nice smooth sounding shut down :)

this all sounds good..does it apply to AT as well?

I never turn it off cold... So I have never revd to 3k prior to shut off.

As much as I'd like to make allowances, it IS a pain in the *** to follow the 5-minute rule any time I want to move the thing, which I have to do regularly to either wash it or get at certain things in the garage. So, for these types of moves I run it for maybe a minute then use the 4Krpm shutdown trick. So far it's been starting fine. The longest startup I had took about 4 seconds and that one was in a parking lot after it had been shutdown fully warmed up. Usually much quicker. Only had it for a couple of weeks though.