Go Back   EcoModder Forum > EcoModding > Instrumentation
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-28-2008, 08:34 AM   #1 (permalink)
EcoModding Apprentice
 
rjacob's Avatar
 
Join Date: Jun 2008
Location: Rochester, NY
Posts: 152

2000 Honda Civic VP - '00 Honda Civic VP
90 day: 40.41 mpg (US)
Thanks: 2
Thanked 38 Times in 4 Posts
Scangauge II vs cruise control

I bought a ScanGauge II a few weeks ago and love it. It has improved my hypermiling. Yesterday I had a Rostra cruise control installed in my 2000 Honda Civic VP (DX value package). (Yeah I know that I can probably beat the cruise control by manually operating the throttle, but we do a lot of long driving trips) Anyway, the cruise control seemed to be working fine, but then would just spontaneously disengage. It would work for 5 minutes, then shut off, then I would reset it, and it might work for another minute or two, then just shut off. I took my car back to shop, and the guy swapped out the unit, the control, resoldered everything. He took it for a test drive, and it still did it. He thought it might be the Scangauge II. I drove the car home with the ScanGauge unplugged, and never had a problem. The cruise control is contected to the VSS. Is it possible for the Scangauge to be interfering the cruise control? The cruise control will disengage if the RPM's spike. Is it possible the SGII is somehow making the cruise control think the RPMs have jumped? Is there some way to stop this from happening? I love the data I get from the SGII, but would like to use the CC for long trips. It would be nice the see the SGII at the same time.

I emailed the guys at Linear Logic, and am waiting to hear back.

Thanks,
RJ

__________________
GreenCarMPG.com


Last edited by rjacob; 06-30-2008 at 03:10 PM..
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-28-2008, 10:09 AM   #2 (permalink)
EcoModding Apprentice
 
Join Date: May 2008
Location: South Dakota
Posts: 117

GMC Sonoma - '94 GMC Sonoma
90 day: 36.97 mpg (US)
Thanks: 0
Thanked 3 Times in 3 Posts
Can't you disconnect the Scangage and see if the problem persists?

I don't own a Scangage but I very highly doubt that it is altering the VSS or any other signal. That would be unacceptable.

I tried using a spark plug wire inductive pickup to get a motor speed signal from my fuel injected engine but discovered that under certain conditions, such as deceleration, the spark is stopped thus making it a discontinuous signal and unacceptable for a cruise control. The VSS should not be discontinuous though.
  Reply With Quote
Old 06-28-2008, 11:19 AM   #3 (permalink)
EcoModding Apprentice
 
Join Date: Jun 2008
Location: Albany, ny
Posts: 248

NewBlue - '07 Honda Civic EX
90 day: 38.13 mpg (US)

The Better Half - '97 Ford Ranger XLT
90 day: 25.84 mpg (US)
Thanks: 0
Thanked 5 Times in 5 Posts
if for some reason the installer tapped into the OBD-II VSS signal? seems strange they would do that but maybe it was the only option... I've never done an aftermarket cruise install but if you parallel to applications off the same signal they will drag each other down unless you have a way to split the signal and keep the voltage up.
__________________
2007 Honda Civic Ex
Second Goal = 50mpg
First goal = 40mpg Goal Achieved 3 tank average over 40mpg
Starting point 30mpg ready...... GO.

  Reply With Quote
Old 06-28-2008, 11:32 AM   #4 (permalink)
EcoModding Apprentice
 
rjacob's Avatar
 
Join Date: Jun 2008
Location: Rochester, NY
Posts: 152

2000 Honda Civic VP - '00 Honda Civic VP
90 day: 40.41 mpg (US)
Thanks: 2
Thanked 38 Times in 4 Posts
Gregte:
I have done a short 10 mile drive with the SGII unplugged, and had no problems with the cruise control. I am hoping to get out for a drive today to play with it more. If not today, I will be making a 70 mile drive tomorrow on the thru-way.

Blue07CivicEx:
Yes, the Rostra CC plugs into the VSS to get the vehicle speed. It also taps into the tach wire as well.
Here is the install manual on Rostra site: http://www.rostra.com/pdf/Form4565D.pdf
What do other cruise controls do to get the vehicle speed?
__________________
GreenCarMPG.com

  Reply With Quote
Old 06-30-2008, 09:57 AM   #5 (permalink)
EcoModding Apprentice
 
rjacob's Avatar
 
Join Date: Jun 2008
Location: Rochester, NY
Posts: 152

2000 Honda Civic VP - '00 Honda Civic VP
90 day: 40.41 mpg (US)
Thanks: 2
Thanked 38 Times in 4 Posts
I did some longer drives over the weekend. After the guy swapped out the cruise control, it disengages by itself much less. I am thinking it doesn't have anything to do with the scangauge since I had it disengage once without the scangauge hooked up. But during 70 miles on the thru-way yesterday, I had it disengage just once. Still not sure what is causing it. I am doing a bunch of freeway driving next weekend, and will see how it does.
__________________
GreenCarMPG.com


Last edited by rjacob; 06-30-2008 at 03:08 PM..
  Reply With Quote
Old 03-28-2011, 08:22 AM   #6 (permalink)
Musician w/ Light Wallet
 
Join Date: Mar 2011
Location: Midwest
Posts: 47

SeaBiscuit - '98 Honda Civic DX Hatch
Team Honda
90 day: 39.99 mpg (US)
Thanks: 7
Thanked 8 Times in 8 Posts
Hello there. Sorry to revive an old thread, but I've also got a 6th-gen Civic, and I'm looking to put a Rostra in it. Did you ever get this problem ironed out? I'm hoping to use mine simultaneously with an OBD tool also (UltraGauge), but I don't necessarily need to.

Any help would be appreciated.
JMac
  Reply With Quote
Old 03-28-2011, 09:17 AM   #7 (permalink)
EcoModding Apprentice
 
rjacob's Avatar
 
Join Date: Jun 2008
Location: Rochester, NY
Posts: 152

2000 Honda Civic VP - '00 Honda Civic VP
90 day: 40.41 mpg (US)
Thanks: 2
Thanked 38 Times in 4 Posts
The problem went away after he swapped it out. I think it was a bad unit, or a bad connection somewhere. I really like the cruise control. It is so nice on long trips!
__________________
GreenCarMPG.com

  Reply With Quote
Old 06-02-2011, 11:35 AM   #8 (permalink)
EcoModding Lurker
 
Join Date: Jun 2011
Location: michigan
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
This makes sense, I figured it had to be a defective unit. It doesn't make sense that it would alter the VSS or other signals, this would be totally pointless. I am glad you got the issue worked out, I am thinking about getting one of these, so it's good to hear that it works without any complications. I do wonder if this is a common issue though, has anyone had a similar experience? Also, has anyone ever heard of www.acdcind.com? What do yo know about them?

Last edited by naturefreak; 06-07-2011 at 11:43 AM..
  Reply With Quote
Old 06-02-2011, 12:48 PM   #9 (permalink)
Master EcoModder
 
Kodak's Avatar
 
Join Date: Feb 2011
Location: USA
Posts: 346

Canyon - '07 GMC Canyon 2wd regular cab
90 day: 24.95 mpg (US)
Thanks: 41
Thanked 38 Times in 24 Posts
Is there any pattern to when the CC turns off, or is it random?

I recall my mom's '99 Taurus turning off cruise when I tried to use it around town at slow speeds and with large hills. There was a sizable hill, the auto trans was in overdrive and I think the cruise basically turned off.
  Reply With Quote
Old 06-02-2011, 01:01 PM   #10 (permalink)
Pishtaco
 
SentraSE-R's Avatar
 
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,484

Mean Green Toaster Machine - '06 Scion xB
Team Toyota
90 day: 48.92 mpg (US)
Thanks: 56
Thanked 283 Times in 180 Posts
The OEM cruise control on my MT Nissan Sentra SE-R would disconnect on uphills when the engine load got too high.

__________________
Darrell

Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cruise Control (with MPG sensitive logic) guitarterry EcoModding Central 223 07-06-2015 09:40 PM
Official EcoModder ScanGauge II group buy info MetroMPG Instrumentation 71 03-30-2010 08:48 PM
Aftermarket Cruise Control homeworkhome53 DIY / How-to 19 12-10-2008 08:07 PM
Cruise Control Options for 5spd Metro's SirKeats EcoModding Central 6 06-05-2008 12:09 PM
3 ?'s (SuperMID; cruise control for Metro) Pillzilla EcoModding Central 16 03-31-2008 07:34 AM



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com