Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-28-2013, 10:58 AM   #1 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,135

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,444
Thanked 2,494 Times in 1,506 Posts
Installed a coolant temp spoofer on the Prius

What is a coolant spoofer you might ask? Well the Prius goes through 4 warm up stages before you can get it to turn off the engine every time like you'd like to do. Most of the stages are controlled by the coolant temperature. So, this little circuit tells the ECU that the engine is warmer than it really is to get you through the warmup process quicker. Also, if you have the heat turned on in the Prius, depending on the coolant temp, it will keep your engine running or not. So, the coolant temp spoofer basically allows for more engine off operation.

The coolant spoofer I got was from ccdisce over on Priuschat. Its a custom board he designed to do the job, and he now sells them.

Here is the kit contents.






Here is the little tiny spoofer board. Its only about as wide as a quarter.




To install it you remove the glove box to access the ECU wiring behind it. You only have to hook up three wires: power, ground, coolant temp. So, its very simple. Mine was even easier because I already had the wires hooked up to wiretaps from the arduino board.





Here we go, all "installed". It'll probably stay that way just giving company to my EV switch and ipod.





I only just installed it on Thursday night (2 days ago), but I did notice on the way to work on Friday I was able to get my engine to shut off earlier than before. I'm not sure how this will translate to mpg, but at the very least I should be able to use my heater a bit more in winter and that would be quite nice.

Attached Thumbnails
Click image for larger version

Name:	prius 003.JPG
Views:	1298
Size:	64.7 KB
ID:	13829   Click image for larger version

Name:	prius 002.JPG
Views:	1287
Size:	64.4 KB
ID:	13830   Click image for larger version

Name:	prius 004.JPG
Views:	969
Size:	62.9 KB
ID:	13831   Click image for larger version

Name:	prius 005.JPG
Views:	1321
Size:	68.7 KB
ID:	13832  
__________________
Current project: A better alternator delete
  Reply With Quote
The Following 2 Users Say Thank You to Daox For This Useful Post:
jeff88 (09-28-2013), Piwoslaw (09-30-2013)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-30-2013, 03:12 PM   #2 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,135

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,444
Thanked 2,494 Times in 1,506 Posts
On the way to work this morning I definitely could tell a difference with the spoofer in place. I was able to engine off a fair amount earlier, if I had to guess I'd estimate 1/2 mile earlier than normal.. This comes in handy for me especially since my commute is only 7 miles. My warm up time eats up my mileage pretty badly. Anything to reduce warm up helps my mileage out.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 09-30-2013, 03:25 PM   #3 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,763

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 66.29 mpg (US)
Thanks: 3,478
Thanked 6,281 Times in 3,250 Posts
Have other owners chimed in with how much it has affected MPG?

Obviously it'll depend a lot on individual driving/use patterns.
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 09-30-2013, 03:35 PM   #4 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,135

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,444
Thanked 2,494 Times in 1,506 Posts
Yeah its highly driver specific. A lot of the PHEV guys like it because they dont have to worry about the engine cooling off and kicking the engine back on. I don't know about non-phev users.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 09-30-2013, 04:11 PM   #5 (permalink)
EcoModding Newb
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 8,400

Acura TSX - '06 Acura TSX
90 day: 29.14 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 28.5 mpg (US)
Thanks: 2,833
Thanked 3,230 Times in 2,408 Posts
Could spoofing the ECU have a detrimental affect on any engine/exhaust components?

Economy plummets on non-hybrid cars as well. I'd like to spoof my car just to keep it from running at 2,200 RPM on cold starts. At least the Prius is designed to warm up very quickly. The 3rd gen warms up in something like 50 seconds, which is much better than the 3 or so minutes my car takes.

OT, but I'm wondering if the plug in Prius can be purchased, or if they are lease only? I see people on Priuschat talking about leasing, but never purchasing. I never see any listed on Craigslist. The Toyota website is worthless. When you click on the "build a plug in Prius" link, it takes you to a page that lists the local dealers you can get in contact with.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 09-30-2013, 04:24 PM   #6 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,135

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,444
Thanked 2,494 Times in 1,506 Posts
The only detrimental thing I can think of is its going to mess with your ignition timing a little because it does alter the coolant temp signal that the ECU sees.

I know this spoofer is smart though. It waits until the coolant is 116F until it starts working to avoid cold engine enrichment running problems. There was also something else about a check engine light that was programmed around when I was reading the install manual which also had revision notes on it.

There is tons more info on the spoofer here:
A Prius ECT Spoofer MCU Controlled | PriusChat

The same general design could be used for any normal car though.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 12-30-2015, 12:22 PM   #7 (permalink)
EcoModding Lurker
 
kurzer's Avatar
 
Join Date: Dec 2011
Location: Germany
Posts: 99

Knut - '07 Toyota Prius
90 day: 50.9 mpg (US)

Santa - '00 Hyundai Santamo
90 day: 29.07 mpg (US)
Thanks: 58
Thanked 43 Times in 31 Posts
here is my video how install and how it works.


__________________
kurzer Gruß

Prius II
Hyundai Santamo
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com