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Old 05-21-2013, 05:34 PM   #126
gajagfan

 
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Originally Posted by Dropspeed View Post
That is how it worked for me in my car

As an experiment I will go to the same store/inclined parking tonight and try a couple different things to see what happens...I will report my findings later tonight!

I will try 3 things once I see HSA is activated

1) Step on the gas and release the clutch at the same time
2) Step on the gas without releasing the clutch
3) Start to release the clutch without stepping on the gas.

Matt
Thanks for doing this. I am still without a car, but feel like we may be finding the proper technique that will make this much less of a headache! I look forward to your test results.
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Old 05-21-2013, 10:15 PM   #127
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bump...

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Do all 2013's with a manual have this feature or is it only standard on 2LT / 2SS?
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Old 05-21-2013, 10:19 PM   #128
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Mark,

Looks like all manual transmission cars.
http://media.gm.com/media/us/en/chev...maro/2013.html

-Chris
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Old 05-22-2013, 03:24 AM   #129
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I can not see, nor did I like the placement of the aux gauges in the 2013 with the New MYlink radio as the HVAC controls now hang lower on the IP.

I do agree with the wheel blocking the view of the tach and speedo in my seating position. However, on the street I use the center display to display the speed/MPH and listen to the motor when winding her out. At the track the MPH is not important so I will use the center display for coolant temps. ( wish it had oil pressure or oil temps reading out on the center display as well)

-Matt
I'm with you on this, Matt! Thankfully, they have the LCD with the speed, but, unfortunately, that's all it shows when selected. I don't think I have quite a good enough ear to hit 6500 every time.

They might as well start over and take all the gauges out, and just put a large LCD display with all readouts visible at one time, including oil pressure, temp, trans temp, coolant temp, speed, tach, even diff temp. They could make it user configurable, too. Some could even go on the MyLink screen.

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Old 05-22-2013, 10:06 AM   #130
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Originally Posted by Dropspeed View Post
That is how it worked for me in my car

As an experiment I will go to the same store/inclined parking tonight and try a couple different things to see what happens...I will report my findings later tonight!

I will try 3 things once I see HSA is activated

1) Step on the gas and release the clutch at the same time
2) Step on the gas without releasing the clutch
3) Start to release the clutch without stepping on the gas.

Matt
Ok tried this last night...The "test location" It is a parking spot I can pull in while facing uphill and pull straight out up the incline as well. The incline is step enough that HSA turns on every time.

Quote:
Originally Posted by Dropspeed View Post
1) Step on the gas and release the clutch at the same time
I tried this 3 times and did feel the car hold me in place but it seemed to release as soon as I wanted it too/expected it to in order to move forward. (could this be after the 2 seconds window??? maybe, but it was not odd)

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Originally Posted by Dropspeed View Post
2) Step on the gas without releasing the clutch
Nothing happened, HSA stayed engaged until the 2 seconds was up and then car rolled back (because I didn't release the clutch)

Quote:
Originally Posted by Dropspeed View Post
3) Start to release the clutch without stepping on the gas.
I released the clutch slow, car stalled without moving

Interesting note.....I tried my experiment before I went into the store. When I went to leave I

Put the clutch in.
Started the car
Put the car in first
Put my foot on the gas and at the same time released the hand brake and drove away without the HSA activating.

I really didn't think anything of it as that has been my procedure for years to pull out of any spot...Which may explain why I have rarely seen the HSA activate when parked on any incline.

I still have yet to see it activate on the road in a driving condition.....but 95% of my stop lights are on flat ground...only about 5% are on any incline.

-Matt
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Old 05-22-2013, 11:23 AM   #131
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I went through all of these frustrations as well, sent nasty notes to GM, etc. Having said that it CAN be made to work if you understand:

1. The system engages based on the last brake pressure used. So if you come to a fast stop or mash the brake pedal for any reason it will maintain that pressure and you WILL stall.

2. The "remembered" brake pressure can be reset by putting the trans in neutral, releasing clutch, reengaging clutch while using just enough brake pressure to hold the car.

So, get in the habit of stop - neutral - reduce brake pressure - put back in gear.

Now I can live with it but it should be DRIVER optional.
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Old 05-22-2013, 12:33 PM   #132
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I thought that maybe coming to a stop with the trans in neutral was allowing me to avoid the HSA a little more. I haven't noticed it activating many times on me because I've been trying to approach stops and lights in neutral more often.
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Old 05-22-2013, 12:40 PM   #133
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Originally Posted by wakespeak View Post
I went through all of these frustrations as well, sent nasty notes to GM, etc. Having said that it CAN be made to work if you understand:

1. The system engages based on the last brake pressure used. So if you come to a fast stop or mash the brake pedal for any reason it will maintain that pressure and you WILL stall.

2. The "remembered" brake pressure can be reset by putting the trans in neutral, releasing clutch, reengaging clutch while using just enough brake pressure to hold the car.

So, get in the habit of stop - neutral - reduce brake pressure - put back in gear.

Now I can live with it but it should be DRIVER optional.
+1

I've got 6,500 miles on the car and that is the best solution that I've been able to come up with.

Also, if you're really fast with your motions, and the incline isn't very steep, sitting in neutral with the clutch out you can remove your foot from the brake, then put in the clutch, shift into first and go.

The best solution would be an option to just turn the damn thing off.
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Old 05-22-2013, 12:47 PM   #134
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Originally Posted by Jim968 View Post
+1

I've got 6,500 miles on the car and that is the best solution that I've been able to come up with.

Also, if you're really fast with your motions, and the incline isn't very steep, sitting in neutral with the clutch out you can remove your foot from the brake, then put in the clutch, shift into first and go.

The best solution would be an option to just turn the damn thing off.


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Old 05-22-2013, 09:53 PM   #135
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My driveway has an odd incline and this feature makes it screwy to get in the garage.
I just wish I could turn it off.
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Old 05-23-2013, 12:43 AM   #136
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drove mine 35 miles today, had it on an incline and it rolled back. HSA never kicked in. Skip Shift kicked in quite a few times tho
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Old 05-23-2013, 08:48 PM   #137
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Thanks Chris. They are building my car soon. I should just request they "leave this one out". :-)


Quote:
Originally Posted by Ccasey View Post
Mark,

Looks like all manual transmission cars.
http://media.gm.com/media/us/en/chev...maro/2013.html

-Chris
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Old 05-24-2013, 05:11 PM   #138
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Quote:
Originally Posted by Ccasey View Post
Mark,

Looks like all manual transmission cars.
http://media.gm.com/media/us/en/chev...maro/2013.html

-Chris
Obviously they haven't been listening to us bitch! and this thing has no business being on a performance car!!!!!!!!!!!
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Old 05-24-2013, 06:27 PM   #139
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Had HSA kick in for the first time yesterday. I took my car to a parking garage and tried to see if it would kick on. It did. I found it pretty helpful, HSA works fine in my 1LE, as I started moving forward it slowly let off the brake pressure and then shut off. Tried to see if it would kick on when on a downward slope and it didnt.
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Old 05-24-2013, 08:16 PM   #140
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I found it pretty helpful, HSA works fine in my 1LE, as I started moving forward it slowly let off the brake pressure and then shut off. Tried to see if it would kick on when on a downward slope and it didnt.
Wait til the 1st time you hit the brakes hard, then forget that HSA is on....stall!

btw, downward slope engages when in REVERSE.


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Old 05-24-2013, 08:46 PM   #141
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Those of you who are defending this piece of *hit,take a look at post #73 and tell me how this is a good thing????????...........and remember, WE know how to drive a manual!

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Old 05-24-2013, 10:46 PM   #142
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There has to be a harness that a resistor can get thrown into like the skip shift eliminators do...


I live in FL where it is relatively flat, I mainly run into HSA going up my driveway into my garage. It makes me look like a schmuck every time though.

The other day I almost wrecked trying to pull out of the BestBuy parking lot. It activated and I was so busy trying to overcome it I lost track of on coming traffic. There was a car coming and well when the HSA released I launched in front of a car fortunately for me and my son not to mention my Camaro SS 1LE the driver was alert enough to swerve out of the way.
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Old 05-25-2013, 02:22 PM   #143
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Yep, this is an amazing device sigh.........!
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Old 05-25-2013, 05:50 PM   #144
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There has to be a harness that a resistor can get thrown into like the skip shift eliminators do...


I live in FL where it is relatively flat, I mainly run into HSA going up my driveway into my garage. It makes me look like a schmuck every time though.

The other day I almost wrecked trying to pull out of the BestBuy parking lot. It activated and I was so busy trying to overcome it I lost track of on coming traffic. There was a car coming and well when the HSA released I launched in front of a car fortunately for me and my son not to mention my Camaro SS 1LE the driver was alert enough to swerve out of the way.
This is exactly the type of experience that should be reported to the NHTSA.
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Old 05-25-2013, 09:10 PM   #145
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There has to be a harness that a resistor can get thrown into like the skip shift eliminators do...
The accelerometer (yaw sensor) that controls this function appears to output a single data stream that contains the information. I was looking for a pitch output that could be isolated, but a serialized signal would require some other type of modification. Like reading the data stream, removing the pitch signal, and passing the modified signal the the brake controller. By the way the yaw sensor is part of the traction control systems, so it may cause serious issues if messed with. I would prefer the option to disable HSA easily.
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Old 05-25-2013, 09:53 PM   #146
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The accelerometer (yaw sensor) that controls this function appears to output a single data stream that contains the information. I was looking for a pitch output that could be isolated, but a serialized signal would require some other type of modification. Like reading the data stream, removing the pitch signal, and passing the modified signal the the brake controller. By the way the yaw sensor is part of the traction control systems, so it may cause serious issues if messed with. I would prefer the option to disable HSA easily.

Well all that sounded complicated...

I'm sure someone way smarter than me will figure something out. Maybe you are the guy.
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Old 05-25-2013, 10:31 PM   #147
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Well all that sounded complicated...

I'm sure someone way smarter than me will figure something out. Maybe you are the guy.
LOL

Well, I owe everyone an apology. I got my car on Thursday and HSA is already starting to kick my ass. I stalled twice on a big hill a few blocks away from the dealership, and once going up my driveway. This shit definitely sucks.
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Old 05-26-2013, 05:49 AM   #148
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Been playing with this the last few days. I found that the experienced driver method of dealing with hills doesn't work. Try to bare with me as this is hard to explain.

I tried leaving on a hill with the usual blip of the throttle and a somewhat aggressive lift of the clutch like I have done for years when driving a manual. Almost stalled the engine.

Then I tried leaving as though I was on flat ground. A slight touch on the throttle and a slow gradual lift of the clutch. Pulled away like butter.

It seems as though us experienced manual drivers are just too fast for the system. I know it sounds crazy, but try pulling gently away as soon as the light changes. No anticipation of the HSA release point. No attempt to avoid rolling back. Just a normal flat ground in traffic low rpm launch. Let the torque get the car rolling and I think you will notice it as being less intrusive.
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Old 05-26-2013, 10:28 AM   #149
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Rather than defeating the electronics in this system, I wonder if we could stop the system from mechanically trapping the brake fluid pressure. If the electronic signal to trap pressure does not make it to the mechnical pressure trapping device, then the car will operate as if it has no HSA system. Maybe.
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Old 05-26-2013, 11:00 AM   #150
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Also, "newb", good point and description, this how I see this system operating also. Great if the driver is just normally pulling away, but I can see how this system can cause the engine to stumble or stall if the driver is trying to QUICKLY move off to, say, fit into a smaller than normal gap in heavy traffic.

A competent driver moving off quickly can easily beat the two second delay. Then we can have two opposing forces as the driver wants to move the car forward immediately, but the HSA system wants to hold the car in place for an additional second. The driver has to either wait for a larger gap in traffic to start off normally, or get off the brake a second or so before actually wanting to start forward quickly. I would rather just have control of the situation myself, hence the choice of manual transmission in the first place.

Come on Chevy, a way to disable HSA makes sense here and should have been available all along.
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