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  #157  
Old 07-03-2015, 08:07 PM
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Re: green diesel engineering tune

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Originally Posted by stician View Post
I thought Hill Assist is for negotiating steep slopes with the foot off both brake and gas and the truck rolls down at 5mph.
That's what it's designed to do. That's why I was asking Chad about passing.

I can understand turning it off might help throttle response from a stop when on a hill, but it doesn't make sense to have an effect on passing.

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  #158  
Old 07-03-2015, 08:40 PM
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Re: green diesel engineering tune

My Jeep for some reason has better overall throttle response at all times with Hill Assist off. I can't explain why, just happier Jeep with it off. I've tried it both ways when the vehicle was new. Was like it was always holding back somehow
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  #159  
Old 07-03-2015, 08:41 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by chadg2 View Post
My Jeep for some reason has better overall throttle response at all times with Hill Assist off. I can't explain why, just happier Jeep with it off. I've tried it both ways when the vehicle was new. Was like it was always holding back somehow
I've never turned it on. It's for off-road use.
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  #160  
Old 07-03-2015, 10:10 PM
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Re: green diesel engineering tune

More miles tonight on the Hot Tune. I drove it on more flat roads and the cruise is not fluctuating more than +/- 1 maybe 2 at most. I think those first 90 miles I put on was hillier than I originally thought. If the cruise was tweaked for MPG and it only dances around on steep hills I think we should leave it alone. Steep hills are going to be +/- 2 maybe 3MPH at times. I just wanted to tell everyone I let my wife drive that was very skeptical of me buying this tune for $800 and after 20-30 miles she gave me the thumbs up. She said "it didn't seem like anything changed from the passenger seat, that feeling changed once I got behind the wheel" She loved the smooth shifting and the extra power/torque . I didn't notice the power as much as she did. She has a heavier foot than me. Anyway she's happy... I'm relieved.
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  #161  
Old 07-03-2015, 11:48 PM
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green diesel engineering tune

Quote:
Originally Posted by chadg2 View Post
Thank you I do not have ACC. No mention of this on GDE website for this tune. Thanks for that info. I only could request this now if the flash tool becomes available in the future right?

From the GDE site:

Refined cruise control operation (only for vehicles without adaptive cruise control)
Retuned speed control for improved fuel economy
Better gear holding during accelerations and uphill driving
Lower possible set speed (15mph instead of 25mph, can resume from 5mph)
Faster buttons' response

I believe the refined operation is the fluctuation you are experiencing which smooths things out a bit and increases MPG. Someone else mentioned it earlier, but the need for this thing to maintain speed is annoying. Drops several gears and snaps to accelerate back up to speed instead of just using all that available torque.


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  #162  
Old 07-03-2015, 11:56 PM
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The cruise does want to get you back up to speed as fast as possible and it feels it's late doing so. My 07 was like that too. Sometimes I tap the brakes worth the adaptive cruise and manually bring me back up to speed just so I don't get the whiplash going. Kind of defeats using the adaptive cruise though.
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  #163  
Old 07-04-2015, 11:18 AM
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Originally Posted by mazster43 View Post
Sometimes I tap the brakes worth the adaptive cruise and manually bring me back up to speed just so I don't get the whiplash going. Kind of defeats using the adaptive cruise though.
I love ACC and will never buy another vehicle without it.

The easiest way to tame the acceleration in ACC is to lock your Jeep into 8th gear via the shift paddles.

I will also cancel ACC when following a semi that has switched lanes to pass a slower vehicle, because ACC can get confused for a moment: when changing into the left lane it will start to accelerate but it will brake a few seconds later due to overzealous acceleration. That's a bit annoying so in that scenario I cancel ACC before the lane change and then resume ACC once the lane change is complete.

Between these two tactics ACC stays quite smooth for me. Give it a shot.
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  #164  
Old 07-04-2015, 11:25 AM
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Re: green diesel engineering tune

if you don't tow and don't live in a mountainous region is the engine braking feature annoying or a good idea for the occasional ski trip?
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  #165  
Old 07-04-2015, 03:22 PM
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Re: green diesel engineering tune

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Originally Posted by stician View Post
I've never turned it on. It's for off-road use.
You must be referring to "Hill Descent Control" We are discussing "Hill Assist".

Hill Start Assist (HSA)
The HSA system is designed to assist the driver when
starting a vehicle from a stop on a hill. HSA will maintain
the level of brake pressure the driver applied for a short
period of time after the driver takes their foot off of the
brake pedal. If the driver does not apply the throttle
during this short period of time, the system will release
brake pressure and the vehicle will roll down the hill. The
system will release brake pressure in proportion to the
amount of throttle applied as the vehicle starts to move in
the intended direction of travel.

HSA Activation Criteria

The following criteria must be met in order for HSA to
activate:
• Vehicle must be stopped.
• Vehicle must be on a 6% (approximate) grade or greater
hill.
• Gear selection matches vehicle uphill direction (i.e.,
vehicle facing uphill is in forward gear; vehicle backing
uphill is in REVERSE gear).
HSA will work in REVERSE and all forward gears when
the activation criteria have been met. The system will not
activate if the vehicle is placed in NEUTRAL or PARK.
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  #166  
Old 07-04-2015, 03:25 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by chadg2 View Post
My Jeep for some reason has better overall throttle response at all times with Hill Assist off. I can't explain why, just happier Jeep with it off. I've tried it both ways when the vehicle was new. Was like it was always holding back somehow
Sounds like you there is some sort of problem with your jeep. Maybe the dealer can help diagnose the problem.

From the Owners Manual:

HSA Activation Criteria

The following criteria must be met in order for HSA to
activate:
Vehicle must be stopped.
• Vehicle must be on a 6% (approximate) grade or greater
hill.
• Gear selection matches vehicle uphill direction (i.e.,
vehicle facing uphill is in forward gear; vehicle backing
uphill is in REVERSE gear).
HSA will work in REVERSE and all forward gears when
the activation criteria have been met. The system will not
activate if the vehicle is placed in NEUTRAL or PARK.
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  #167  
Old 07-04-2015, 07:47 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by Roadkill View Post
I love ACC and will never buy another vehicle without it.

The easiest way to tame the acceleration in ACC is to lock your Jeep into 8th gear via the shift paddles.

I will also cancel ACC when following a semi that has switched lanes to pass a slower vehicle, because ACC can get confused for a moment: when changing into the left lane it will start to accelerate but it will brake a few seconds later due to overzealous acceleration. That's a bit annoying so in that scenario I cancel ACC before the lane change and then resume ACC once the lane change is complete.

Between these two tactics ACC stays quite smooth for me. Give it a shot.
Boom, that's what I'm talking about! After 1500 miles or so of whiplash road tripping' I figured that out on my own. If I force it into a gear it won't downshift from 8th to 5th and floor it!
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  #168  
Old 07-04-2015, 10:16 PM
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Quote:
Originally Posted by Roadkill View Post

I love ACC and will never buy another vehicle without it.

The easiest way to tame the acceleration in ACC is to lock your Jeep into 8th gear via the shift paddles.

I will also cancel ACC when following a semi that has switched lanes to pass a slower vehicle, because ACC can get confused for a moment: when changing into the left lane it will start to accelerate but it will brake a few seconds later due to overzealous acceleration. That's a bit annoying so in that scenario I cancel ACC before the lane change and then resume ACC once the lane change is complete.

Between these two tactics ACC stays quite smooth for me. Give it a shot.
I don't drive a ton of highway. When I do take a long highway trip it's usually in the winter and I'm towing a small trailer. But I will try using the paddles the next time in on the highway.
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