Ramyond

i've been reading a lot of posts about people reving to 3-4 K before turning off the engine. I understand this helps push out unburnt gas from the chambers, but are there any side effects on having the rotors spin while the engine is off? Does the oil pump still inject oil to lubricate the seals or...does that not matter?
Info pleaseeeee
thank you!

Jedi54

iTrader: (7)

people used to do that when flooding was an issue with the RX-8. No longer an issue with the newer plugs, upgraded starter and battery.

you can turn your car off like normal.

Ramyond

wow thanks for the quick response! haha....but maybe i'm paranoid...I've recently purchased my 2008 rx8 and i had a time when it just took a little longer to start up the car( it didn't sound as smooth as normal) and after that time... i just started reving my car to 3K before turning off and I've never experienced the abnormal start up.....but now i'm worry that it might be bad for the engine because of my concern on rotor lubrication.

Easy_E1

iTrader: (2)

Jedi54 has spoken!

Ramyond

um.....okie....and done! haha.....

Jedi54

iTrader: (7)

you can rev it if you want, you won't hurt the engine.

Huey52

iTrader: (2)

If not fully warmed, I do the 3k rpm rev, hold for ten seconds,and shut off while spooling down. May not still be necessary but I'm not taking any potenital flooding chances. Zero floods in three years and 20K miles for me.

04RX8man

I shut off normally and been fine however have had a few long starts lately but I"m not on the upgraded starter so before my warranty runs out in Feb i need to go to the dealer complaining of that and rough idle!

Jedi54

iTrader: (7)

^^ get it done sooner then later. Those last few thousand miles of warranty really do go by quickly! You'll love the new starter! I forget how big of a difference the starter makes until I'm at a meet and I hear someone with the old version, that thing sounds SO SLOW and just seems to take forever to start.

04RX8man

^yeah well mileage is not a prob unless I put about 8,000 miles on in like a few weeks just runs out sometime in Feb so I just need to go this week...do u think going with the printed out TSB will help things move along easier?

Mazurfer

I'd have it with me just in case.

04RX8man

that's what i figured i know it wouldnt hurt....i also want them to check outthe motor mounts they may b going or are bad!

Nopstnz8

iTrader: (6)

Wait are you guys saying that we can now turn the car off when fully cold after a few seconds and not have to worry about potential flooding?

cjkim

I've been shutting off cold for years now... no problems here.
oddly enough, the only times i get the longer crank (which is pretty rare) is when the engine is warm.

rx8phase1

iTrader: (1)

like i said b4 Jedi always helping a brother out!

DOMINION

I use to do this till I flooded my 8 one night missed a day of work and spend all day at the dealer ship. I was pissed. Just turn it off.

Minotavr

Not to mention it looks pretty cool revvvving when you shut down the engine. It's a special unique thing. Funny is that I do the same when I shut down my girl's Ford Fiesta, just out of reflex !

Huey52

iTrader: (2)

Huh? Stronger starter/battery aside, it can't hurt to clear out excess fuel when cold, which is of course 'flooding.'

btw: don't rev and hold above 5k rpm as that would open up the add'l supply and be therefore somewhat self defeating.

DOMINION

Just turn it off. Been doing that sence 2004 to my old AT and MT no issuse what so ever.

Huey52

iTrader: (2)

Yeah, but you live in Vegas and like playing the long odds.

TrochoidMagic

there is no sense in doing this other thab 4 fun.

as long as the motor's turning, the alternator is spinning and supplying power to drive the injectors... so more fuel is dumped in regardless. how is this more useful than just driving hard on your trip and shutting down normally?

this is an misunderstood myth. and its more useful for OLDer carburator type cars as they do so to build up fuel pressure in the lines for ease of the next start up.

expect to get weird looks and headscratch from older muscle car guys when they see u do this.

Nubo

No, the injectors are on the Ignition circuit they are not powered once you turn the key; that is the whole point of the procedure, to cut fuel while the rotors continue to spin down.

It's got nothing to do with carburator, the issue for RX8 is unburnt fuel diluting the oil film between seals and housing, which results in loss of compression and hard starts. The change from peripheral ports to side ports makes this problem more difficult on Renesis than previous rotaries.

To answer the OP, the internal oil film is plenty for the second or two it takes for the engine to spin down.

AAChaoshand

Yeah once in awhile I have a long turnover, I'm gonna milk the hell out of my warranty in a couple of weeks.

TrochoidMagic

well...

so i guess i'll go ahead and rev as high as the sky when everything is shut off and see where that takes me, is what ur suggesting.

but aside from the injectors connected to the ignition.... what else?
how about the fuel pump?!

i simply saw absolutely NO point in this, and why not a single manufacturer makes this necessary on vehicle shut down.

noones motor will die on normal shut down. and i think this is a stupid thing to do... (the topic has been brought up before, and the answer was more or less for older cars with throttle plate issues or others, again.)
listen carefully, without the car running, turn the ignition off to accessory. do you hear a click?
if you don't believe me, take a closer look at your drive-by-wire TB. ever wonder why it never really is fully seated?

honestly, my opinion differs. no offense though... i simply cannot beat some peoples explanations when it comes to rotary cars. maybe i CAN learn

but hey,thanks alot for keeping this "ricey" procedure going and getting more peopple to do it unnecessarily.

Razz1

Redline a day keeps the mechanic away.........