Rev to 4k Then Shut-off?
#1
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Rev to 4k Then Shut-off?
The Mazda service advisor told me today that every time I turn off the car to rev it up to 4,000 RPM, then shut it off with the revs up there. Any thoughts?
#2
Surf Hard, Drive Hard
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You do not need to do this unless the engine is cold(or not up to opertaing temp).
There are a ton of threads on this.
Convention wisdom here is that if the car isn't up to temp, then rev to 3k and turn the car off, otherwise, just shut it off(if warm).
Me.........I just go for a spin around the block when it's cold, even if I need to just move it for some reason.
There are a ton of threads on this.
Convention wisdom here is that if the car isn't up to temp, then rev to 3k and turn the car off, otherwise, just shut it off(if warm).
Me.........I just go for a spin around the block when it's cold, even if I need to just move it for some reason.
#6
SARX Legend
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Can't hurt. Just a good habit to get into in case there is a day when you have a brain fart and shut it off cold by mistake. I never shut my car off cold and I have the BHR kit and I still do this out of habit.
#9
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Someone correct me if I am wrong but the reason people rev to 3 or 4k when its cold and they have to move the car from say the driveway into the garage is because when you start the car theres more gas than is needed in the combustion chamber so it just clears it all out by reving? Hence why it can flood. So once you do that it *should* be ok to just turn off.
#10
Drummond Built
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Someone correct me if I am wrong but the reason people rev to 3 or 4k when its cold and they have to move the car from say the driveway into the garage is because when you start the car theres more gas than is needed in the combustion chamber so it just clears it all out by reving? Hence why it can flood. So once you do that it *should* be ok to just turn off.
#11
Nitrous Threadjacker
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Originally Posted by WTBRotary!
spins the rich gas out to help prevent flooding.
Last edited by JessiahC; 03-18-2010 at 04:44 AM.
#15
One Shot One Kill
a test i do is if i rev up, let go, and hear alot of POP POP POP POP , it's still too cold and i wouldn't risk shutting it off. (only do this if i know it's still too cold)
#16
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The actual procedure is described in the Quick Tips booklet, and I think (not completely sure) on the DVD. Not everyone has those. You'd think that a service advisor at a dealer might have learned it, but I guess not.
Revving to 3K isn't a substitute for warming the engine before shutting it off. It's what you should do if you warmed it by idling instead of driving.
Ken
Revving to 3K isn't a substitute for warming the engine before shutting it off. It's what you should do if you warmed it by idling instead of driving.
Ken
#17
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revving the engine when you want to shut it off cold is to prevent gas flooding the engine, not 100% sure but it makes sense
I saw the dealer rev it and turn it off let it spin down with no throttle so no gas gets injected and everything gets pushed out of the engine.
I saw the dealer rev it and turn it off let it spin down with no throttle so no gas gets injected and everything gets pushed out of the engine.
#18
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Just to clear something up here. SO this procedure ISNT a susbtitute for driving around and warming it up or leting it up warm up by idling right? LIke by doing this procedure you arent in fact warming up the car right ? So confused lol
#19
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no it doesnt warm up the engine, it pushes out the gas in the engine
#20
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Short trip driving procedure
For any trip that is too short for the
engine to reach normal operating
temperature, (needle in middle of
temperature gauge indicates normal
temperature), the following
procedure should be followed**:
1. Start engine
2. Move vehicle
3. Warm engine for 5-minutes at idle
4. Raise engine speed to 3000
RPM for 10-seconds
5. Return to idle
6. Turn off engine
For any trip that is too short for the
engine to reach normal operating
temperature, (needle in middle of
temperature gauge indicates normal
temperature), the following
procedure should be followed**:
1. Start engine
2. Move vehicle
3. Warm engine for 5-minutes at idle
4. Raise engine speed to 3000
RPM for 10-seconds
5. Return to idle
6. Turn off engine
#21
The dealer in Norman, OK told me this exact same thing yesterday. Her reasoning was to "push the carbon out of the engine" but then again she told me I needed to "drive this car like I stole it" so I didn't know what to think.
I'm a new owner as of week ago and I'm loving it so far
I'm a new owner as of week ago and I'm loving it so far
#22
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You basically do need to drive it like you stole it. Makes for a happier rotary engine. When I called mazda one time they told me the rx8 'has the heart of a race car, and needs to be driven as such' which blew me away, a company telling me to drive like that lol. I'm only to happy to follow their directions though.