Eco Mode (cylinder deactivation) not working after tune
05-16-2019, 01:58 PM
#21
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Well, if you do it correctly, you can supercharge or Turbo charge your car and it'll act totally stock until you put the hammer down. I had a 735 RWHP Camaro twin turbo that got 28 miles to the gallon as long as I was cruising on the highway and not in the boost zone. Save the gas until you want to use it to show off.
Elmer
05-16-2019, 02:06 PM
#22
Le Mans Master
OP - have you used ECO mode prior to the tune? With my M7, I can't stand it. I can feel it cut in and out. Drives me nuts.
05-16-2019, 02:53 PM
#23
Instructor
Not true in a 19 GS. In tour mode V4 kicks in quite a bit, from surface street speeds to freeway speeds as long as I'm not accelerating or climbing a hill. What really bothers me is how much is switches back and forth. It seems GM may have it go into V4 mode sooner than it should.
Last edited by Bsull; 05-16-2019 at 02:53 PM.
05-16-2019, 02:55 PM
#24
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Not true in a 19 GS. In tour mode V4 kicks in quite a bit, from surface street speeds to freeway speeds as long as I'm not accelerating or climbing a hill. What really bothers me is how much is switches back and forth. It seems GM may have it go into V4 mode sooner than it should.
He has a M7. It only goes V4 in ECO. Do you have the A8 or the M7?
Elmer
05-16-2019, 02:57 PM
#25
Moderator
On the M7 tranny cars V4 will ONLY happen in ECO mode. Auto trannies are a totally different story.
05-16-2019, 02:59 PM
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St. Jude Donor '12-'13-'14-'15-'16-'17
05-16-2019, 02:59 PM
#27
Drifting
Not true in a 19 GS. In tour mode V4 kicks in quite a bit, from surface street speeds to freeway speeds as long as I'm not accelerating or climbing a hill. What really bothers me is how much is switches back and forth. It seems GM may have it go into V4 mode sooner than it should.
05-16-2019, 02:59 PM
#28
Racer
In HP tuners for a c7, turning AFM completely off is a simple switch. I turned mine off using HP tuners on my 2015 A8 long ago. My car will not go into v4 mode, and I don't miss it. To me it feels smoother than before. Your tuner likely set AFM to disabled.
Last edited by Jcrumpley; 05-16-2019 at 03:00 PM.
05-16-2019, 03:21 PM
#29
Instructor
05-16-2019, 03:21 PM
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St. Jude Donor '12-'13-'14-'15-'16-'17
05-16-2019, 03:39 PM
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Great, now we've got a A8, V4, discussion in an M7 thread.
Aaaaargh!
Elmer
Aaaaargh!
Elmer
Last edited by eboggs_jkvl; 05-16-2019 at 03:45 PM.
05-16-2019, 05:27 PM
#32
Well, if you do it correctly, you can supercharge or Turbo charge your car and it'll act totally stock until you put the hammer down. I had a 735 RWHP Camaro twin turbo that got 28 miles to the gallon as long as I was cruising on the highway and not in the boost zone. Save the gas until you want to use it to show off.
Elmer
Elmer
Last edited by serpent; 05-16-2019 at 05:28 PM.
05-17-2019, 01:27 AM
#33
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A supercharger take power from the engine to make power. The turbo is a different story and makes its power from the exhaust. They arent the same, your example on a turbo car doesnt work for his application. He added a supercharger to his NA car and now he wants to improve mpg? Lol, remove the supercharger and you will improve mpg and save weight on the front of the car too.
I added the turbos and I added the SC on my 2007 Vette. My gas mileage didn't change unless I hammered it.
I'll go back to my regularly scheduled programming and surf the forum in other threads.
Elmer
05-17-2019, 01:48 PM
#34
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St. Jude Donor '17, '19
I don't understand why people say they don't gain that much. I have a manual and when i drive to my parents and family get togethers, it is about 3-4 hours of straight interstate driving. If I am in sport, I get 26-28MPG, if I put it in eco mode, I get 32-35. That is huge difference.
And with a manual there is no torque converter. So how could I potentially damage the engine? As far as I know, there are not complaints on manuals and the use of v4 mode. I understand there 4 cylinders have to spin the other 4, but you are a cruising speed. It doesn't take that much effort to maintain speed. And as soon as you start to slow down or pick up speed, it switches back to v8.
And with a manual there is no torque converter. So how could I potentially damage the engine? As far as I know, there are not complaints on manuals and the use of v4 mode. I understand there 4 cylinders have to spin the other 4, but you are a cruising speed. It doesn't take that much effort to maintain speed. And as soon as you start to slow down or pick up speed, it switches back to v8.
05-17-2019, 04:20 PM
#35
Advanced
Thread Starter
Cylinder deactivation back on. It had to with being catless and the heat in that area I think is what the tuner said. He messaged hp tuners about it. Anyway it works now.
Why did I want it? To me it's a nice feature that comes with the car and I get about 60-80 miles more from a tank using it. I'm in a manual so I don't think the torque converter discussion is relevant to me at least. As far as it destroying other things well I cant speak to that, I'm only just now hearing about that. I cant imagine GM would keep putting that feature in their cars if it makes the engines grenade.
Why did I want it? To me it's a nice feature that comes with the car and I get about 60-80 miles more from a tank using it. I'm in a manual so I don't think the torque converter discussion is relevant to me at least. As far as it destroying other things well I cant speak to that, I'm only just now hearing about that. I cant imagine GM would keep putting that feature in their cars if it makes the engines grenade.
Last edited by kenand1988; 05-17-2019 at 04:59 PM.
05-17-2019, 10:14 PM
#36
Melting Slicks
Don't feel bad about wanting it. I had my tuner back in too. But with an aftermarket exhaust, it sounds terrrible. This car is high tech and I dont blame you for wanting to use it. AFM is pretty amazing tech for what it is, however much it accomplishes is hard to say. In low load situations I bet its worth it.
It introduces a lot of vibration into the drivetrain. I have a mgw shifter and you can see it vibrate more when in eco mode. I havent tried it with my new supercharger yet.
It introduces a lot of vibration into the drivetrain. I have a mgw shifter and you can see it vibrate more when in eco mode. I havent tried it with my new supercharger yet.