C7 General Discussion General C7 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Flood clear feature...

Thread Tools
 
Search this Thread
 
Old Nov 20, 2021 | 09:53 AM
  #1  
Raidercop's Avatar
Raidercop
Thread Starter
Pro
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2021
Posts: 501
Likes: 402
From: Maryland
2023 C7 of the Year Finalist - Unmodified
Default Flood clear feature...

Just watched a video on the C4-C7 feature called flood clear. You press the brake pedal and gas pedal all the way down then hit the start button. Your engine cranks without adding fuel so it clears it if its flooded. Then release the gas pedal and it starts right up. Also, a very good way to circulate oil after an oil change or winter slumber without damaging your engine. Maybe I'm just discovering something that everyone else already knew but being a newer C7 owner I found this feature to be helpful and wanted to pass it on.
Heres the video:

Last edited by Raidercop; Nov 20, 2021 at 11:25 AM.
Old Nov 20, 2021 | 10:03 AM
  #2  
dvilin's Avatar
dvilin
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2007
Posts: 45,188
Likes: 8,430
From: Rochester, NY
Default

Thanks for sharing this has been posted before but a good refresher for those not always on the forum or new.
Reply
Old Nov 20, 2021 | 10:22 AM
  #3  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,181
Likes: 3,173
From: Hartford WI
Default

If the engine does not start and no DIC message is displayed, wait 15 seconds before trying again to let the cranking motor cool down. If the engine does not start after five to 10 seconds, especially in very cold weather (below −18 °C or 0 °F), it could be flooded with too much gasoline. Try pushing the accelerator pedal all the way to the floor while cranking for up to 15 seconds maximum. Wait at least 15 seconds between each try, to allow the cranking motor to cool down. When the engine starts, let go of the accelerator. If the vehicle starts briefly but then stops again, repeat these steps. This clears the extra gasoline from the engine.
I don't know anything about the brake pedal. My 16 manual doesn't mention it. Never heard of that for any car either but I could be wrong.
Reply
Old Nov 20, 2021 | 10:37 AM
  #4  
Vette Jockey's Avatar
Vette Jockey
Roadster Madness. 😠
Supporting Lifetime Gold
15 Year Member
Liked
Community Favorite
Top Answer: 5
 
Joined: Sep 2009
Posts: 6,252
Likes: 2,299
From: Ventura Co Ca
SoCal Regional Events Coordinator
St. Jude Donor '13, '20-'21
Default

Interesting, but, the C4 does not have a start button
Reply
Old Nov 20, 2021 | 10:43 AM
  #5  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,181
Likes: 3,173
From: Hartford WI
Default

Originally Posted by Vette Jockey
Interesting, but, the C4 does not have a start button
Mine did. The PO tried to sell it as a "security feature". What happened was that the relay melted and rather than to do it right with cutting it all off, soldering in a new holder and all that, he decided to drill a hole and put a push button. So you turn the key to "run" and push the button so that if a thief comes, he won't know where it is, hence the "security feature". And if you believe that, I have a bridge to sell you.
Reply
Old Nov 20, 2021 | 11:17 AM
  #6  
Maxpowers's Avatar
Maxpowers
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2015
Posts: 6,884
Likes: 2,883
From: Toronto
Default

Ive been here for a while and never heard of this. Interesting. Not sure you can flood a C7 but I may be wrong.
Reply
Old Nov 20, 2021 | 11:21 AM
  #7  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,181
Likes: 3,173
From: Hartford WI
Default

Originally Posted by Maxpowers
Ive been here for a while and never heard of this. Interesting. Not sure you can flood a C7 but I may be wrong.
For whatever reason, GM seems to think it is possible. I copied that from my manual online.
Reply
Old Nov 20, 2021 | 11:21 AM
  #8  
Raidercop's Avatar
Raidercop
Thread Starter
Pro
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2021
Posts: 501
Likes: 402
From: Maryland
2023 C7 of the Year Finalist - Unmodified
Default

Here's the video demonstrating the feature:
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-1

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-2

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
story-3

7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette

 Pouria Savadkouei
story-4

How Likely Are These Five 2027 Corvette Rumors to Be True?

 Brett Foote
story-5

9 Best Corvettes You Can Buy for Half Price (& 1 You Should NEVER Buy!)

 Joe Kucinski
story-6

8 Very Best Corvettes of Amelia Island 2026

 Joe Kucinski
story-7

Top 10 WORST Corvette Engineering Failures of All Time!

 Joe Kucinski
story-8

10 Records the C8 Corvette Generation Has SMASHED (& 1 Glaring Failure)

 Joe Kucinski
story-9

7 Wildest Corvette Concepts Ever Made

 Brett Foote
Old Nov 20, 2021 | 03:22 PM
  #9  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,181
Likes: 3,173
From: Hartford WI
Default

Originally Posted by Raidercop
Here's the video demonstrating the feature:
https://youtu.be/TQgYU0EoZFc
IIRC, even back in the carb days, it was a "clear flood mode". It's been in every EFI car I owned. I quoted the manual above. It is even in my 2003 Seadoo GTX Supercharged where that is how you fog the cylinders. I don't know why you have to press the brake pedal. Nothing said about that in the manual
Reply
Old Nov 20, 2021 | 05:12 PM
  #10  
Avanti's Avatar
Avanti
Race Director
25 Year Member
Community Builder
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 19,847
Likes: 6,646
From: Bonneville Salt Flats
Default

Great, but in practice... trivia the vast majority will never need.
Reply
Old Nov 21, 2021 | 10:23 PM
  #11  
Tahoe's Avatar
Tahoe
Instructor
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 208
Likes: 4
Default

Flood Mode discovered after I got tired of pulling the pump relay in my 2011 GS. 6 spd. Do you have to depress the brake pedal? It appears that I lost the Flood Mode function. Is there a fix?
Reply
Old Nov 21, 2021 | 10:29 PM
  #12  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,181
Likes: 3,173
From: Hartford WI
Default

Originally Posted by Tahoe
Flood Mode discovered after I got tired of pulling the pump relay in my 2011 GS. 6 spd. Do you have to depress the brake pedal? It appears that I lost the Flood Mode function. Is there a fix?
If the engine does not start and no DIC message is displayed, wait 15 seconds before trying again to let the cranking motor cool down. If the engine does not start after five to 10 seconds, especially in very cold weather (below −18 °C or 0 °F), it could be flooded with too much gasoline. Try pushing the accelerator pedal all the way to the floor while cranking for up to 15 seconds maximum. Wait at least 15 seconds between each try, to allow the cranking motor to cool down. When the engine starts, let go of the accelerator. If the vehicle starts briefly but then stops again, repeat these steps. This clears the extra gasoline from the engine.
A direct quote from my manual. Check your own manual online since you mentioned a C6
Reply
Old Nov 21, 2021 | 10:31 PM
  #13  
robert miller's Avatar
robert miller
Team Owner
15 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Photoriffic
 
Joined: Jan 2007
Posts: 29,058
Likes: 1,837
From: cookeville tennessee
Default ttt

Originally Posted by Maxpowers
Ive been here for a while and never heard of this. Interesting. Not sure you can flood a C7 but I may be wrong.
If your meth pump goes crazy & pump that **** & it get a ton on the plugs this c7 is not going to start. But per say I can see this car doing it unless a inj r so keeps pumping gas in on the plugs. But that is why now plugs can go 100,k miles... Robert
Reply
Old Nov 22, 2021 | 05:45 AM
  #14  
449er's Avatar
449er
CF Community Team
Community Builder
Liked
Community Favorite
Top Answer: 5
 
Joined: Apr 2016
Posts: 13,860
Likes: 7,198
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
2024 C6 of the Year Finalist - Unmodified
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
Default

This feature will work on a c6 also
Reply
Old Nov 22, 2021 | 07:15 AM
  #15  
weathermaker's Avatar
weathermaker
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2006
Posts: 4,780
Likes: 96
From: Marlborough Ma
Default

I use this feature when I start the car for the first time in the Spring. However I don’t remember putting my foot on the brake. Maybe I do and just don’t remember it. OPS. (Old People ****).
Reply
Old Nov 22, 2021 | 02:25 PM
  #16  
Tahoe's Avatar
Tahoe
Instructor
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 208
Likes: 4
Default

My engine always starts. The question was about the loss of the Flood Mode function, which I use to prevent dry starts after car sits for a month. I definetly lost this function.
Reply
Old Nov 20, 2022 | 01:45 PM
  #17  
JKU007FL's Avatar
JKU007FL
Racer
Photogenic
Liked
Loved
Community Favorite
 
Joined: May 2020
Posts: 474
Likes: 406
From: South Florida
Default

I know, old thread.
Is this "feature" useful after an oil change?
Reply

Get notified of new replies

To Flood clear feature...

Old Nov 20, 2022 | 03:18 PM
  #18  
Vetteman Jack's Avatar
Vetteman Jack
Administrator
Supporting Lifetime
Veteran: Navy
St. Jude 20 Year Donor
25 Year Member
Veteran: Reserves
 
Joined: Mar 2001
Posts: 366,673
Likes: 24,421
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Default

Interesting video and learned something new today about the C4-C7 Corvettes. Thanks for posting this.
Reply
Old May 15, 2024 | 10:43 AM
  #19  
Spacewalker's Avatar
Spacewalker
Racer
All Eyes On Me
Liked
Loved
 
Joined: Mar 2016
Posts: 359
Likes: 74
Default

I know, old thread, but I was always. a big proponent of using Flood clear mode when starting my c6z that sits for long periods of time between being driven. It has always worked flawlessly. Yesterday however, the car started and revved to redline. The exact opposite of what I wanted.

so now I'm gun shy. Not sure how or why it happened -- but its really bothering me -- felt like abuse,

I didn't think it was supposed to start at all with throttle input. My foot was to the floor.

ugh.
Reply
Old May 15, 2024 | 11:56 AM
  #20  
TraceZ's Avatar
TraceZ
Safety Car
Supporting Member
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2004
Posts: 4,627
Likes: 396
From: Madison Wi
Default

FYI - this is nothing special to the C7. This has been standard function for fuel injected vehicles for decades.

My 1994 Camaro does this. - 30 years old.
Reply



All times are GMT -4. The time now is 12:31 AM.

story-0
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-1
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-2
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE
story-3
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette

Slideshow: Check out these easy-to-install upgrades from Extreme Online Store that reshape the look and feel of the C6 Corvette.

By Pouria Savadkouei | 2026-03-23 17:00:27


VIEW MORE
story-4
How Likely Are These Five 2027 Corvette Rumors to Be True?

There may be some big changes on the horizon.

By Brett Foote | 2026-03-18 06:55:42


VIEW MORE
story-5
9 Best Corvettes You Can Buy for Half Price (& 1 You Should NEVER Buy!)

Slideshow: 9 best Corvettes you can buy for half price (and 1 you shouldn't!)

By Joe Kucinski | 2026-03-17 10:20:26


VIEW MORE
story-6
8 Very Best Corvettes of Amelia Island 2026

Slideshow: 8 best Corvette of Amelia Island 2026

By Joe Kucinski | 2026-03-11 09:28:52


VIEW MORE
story-7
Top 10 WORST Corvette Engineering Failures of All Time!

Slideshow: Top 10 worst Corvette engineering failures

By Joe Kucinski | 2026-03-10 17:38:03


VIEW MORE
story-8
10 Records the C8 Corvette Generation Has SMASHED (& 1 Glaring Failure)

Slideshow: 10 records the C8 Corvette generation has SMASHED (& 1 glaring failure).

By Joe Kucinski | 2026-03-02 11:16:36


VIEW MORE
story-9
7 Wildest Corvette Concepts Ever Made

Out of the many Corvette concepts that exist, these are by far the wildest of the bunch.

By Brett Foote | 2026-03-02 11:03:54


VIEW MORE