Engine stall prevention???
Thread Starter
Heel & Toe
Joined: Jun 2020
Posts: 15
Likes: 3
Engine stall prevention???
Does anybody have any experience or knowledge with the programming on the C7 that is titled
“Engine stall prevention”?My C7 (manual transmission) was blowing warm air intermittently for approximately 15 to 20 seconds after taking off from a start and I took it back to the dealer multiple times and they finally realized that if I was not providing enough throttle at takeoff, then the car went into a mode called “engine stall prevention” and would actually shut the AC clutch off momentarily causing warm air instead of cold air.I asked the advisor how to override that and he said it was not possible.
Does anybody have any knowledge of this program and how it may be overridden to prevent the AC clutch from shutting off during a conservative acceleration?And for the smart asses that might say “just put your foot in it”… I hope your day gets better for you. Lol
“Engine stall prevention”?My C7 (manual transmission) was blowing warm air intermittently for approximately 15 to 20 seconds after taking off from a start and I took it back to the dealer multiple times and they finally realized that if I was not providing enough throttle at takeoff, then the car went into a mode called “engine stall prevention” and would actually shut the AC clutch off momentarily causing warm air instead of cold air.I asked the advisor how to override that and he said it was not possible.
Does anybody have any knowledge of this program and how it may be overridden to prevent the AC clutch from shutting off during a conservative acceleration?And for the smart asses that might say “just put your foot in it”… I hope your day gets better for you. Lol
Last edited by C78353; Oct 4, 2021 at 06:54 PM.
Burning Brakes
Joined: Nov 2016
Posts: 1,192
Likes: 438
From: San Dimas CA
There is an "Alternator Stall Cutout" in HP Tuners, but I don't see anything for the air conditioner. However, when the alternator shuts off, the voltage may drop low enough that the ac compressor clutch also disengages.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,821
From: Charlotte, NC (formerly Endicott, NY)
Does anybody have any experience or knowledge with the programming on the C7 that is titled
“Engine stall prevention”?My C7 (manual transmission) was blowing warm air intermittently for approximately 15 to 20 seconds after taking off from a start and I took it back to the dealer multiple times and they finally realized that if I was not providing enough throttle at takeoff, then the car went into a mode called “engine stall prevention” and would actually shut the AC clutch off momentarily causing warm air instead of cold air.I asked the advisor how to override that and he said it was not possible.
Does anybody have any knowledge of this program and how it may be overridden to prevent the AC clutch from shutting off during a conservative acceleration?And for the smart asses that might say “just put your foot in it”… I hope your day gets better for you. Lol
“Engine stall prevention”?My C7 (manual transmission) was blowing warm air intermittently for approximately 15 to 20 seconds after taking off from a start and I took it back to the dealer multiple times and they finally realized that if I was not providing enough throttle at takeoff, then the car went into a mode called “engine stall prevention” and would actually shut the AC clutch off momentarily causing warm air instead of cold air.I asked the advisor how to override that and he said it was not possible.
Does anybody have any knowledge of this program and how it may be overridden to prevent the AC clutch from shutting off during a conservative acceleration?And for the smart asses that might say “just put your foot in it”… I hope your day gets better for you. Lol
Bill
Safety Car
Joined: May 2004
Posts: 4,628
Likes: 397
From: Madison Wi
You should be able to get the car moving by just letting the clutch out without hitting the throttle until the tires start to rotate and then adding a slight amount of throttle as the clutch is fully engaged. That is how Spring Mountain wanted students to drive their M7s. No revving the motor before letting the clutch out. I still follow that instruction and I don't have a problem with stalling, hesitating or with the AC kicking off.
Bill
Bill
I learned to drive stick decades ago by revving slightly and over the past few years it's taken some effort to re-learn this new method. I've stalled out a few times being too aggressive at idle RPM, but that is the way it goes. This method of driving is really easy on the clutch so I'm determined to master it.
Safety Car
Joined: Jul 2018
Posts: 4,303
Likes: 2,055
From: Margate, FL
Never heard of a stall feature on the C7, however many report the throttle body does have this small dead zone at throttle tip in. This can cause it to not respond immediately and might stumble a bit off the line. I have noticed the A/C compressor seems to cut off as you describe in traffic as it cycles or depending on the temperature setting. For example if the A/C and outside temp are very close it can blow warm occasional as it attempts to stabilize the cabin temp. I've learned to just set the temp a bit lower then desired - this makes it a touch cool but stops it from blowing warm on those rare occasions. To help I set the vents to bi-level (chest and feet) so the air mixes better.
