Go Back   EcoModder Forum > EcoModding > Hypermiling / EcoDriver's Ed
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-22-2015, 11:24 AM   #31 (permalink)
Master EcoModder
 
Joggernot's Avatar
 
Join Date: Jun 2013
Location: Texas
Posts: 372
Thanks: 1,136
Thanked 92 Times in 75 Posts
It's "winter" down here, so we have the alcohol mix gas. It's been spotty; some well above EPA and some below EPA. Can't explain it; drive the same route most days; but fill up may be higher alcohol or lower alcohol, depending on where I go for cheap gas.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-27-2015, 12:00 AM   #32 (permalink)
EcoModding Lurker
 
Join Date: Dec 2015
Location: Earth
Posts: 16
Thanks: 1
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Xist View Post
Wow. Eight months. I hate to hijack this thread, but I will say a little about my HX. I do not ever remember having my car lose power on the highway or freeway, which everyone says is indicative of lean burn, but I try to maintain 55 MPH, although my GPS says that is only 51 MPH. I had been at or near 50 MPG each tank until I finally started my current job. I have driven 1,400 work-related miles since the end of September and I usually hit traffic. My tanks have been around 40 MPG since. I wondered if it was the colder weather and I realized that my tires were only at or below 30 PSI. Also, someone backed into my car, and I took off my grill block and air dam until I could pop out the dent, but I had 40 MPG tanks in October.

How have you guys done?
well I'm new here, but have a 96 HX, and the best I've gotten is 32mpg right now and it's a manual trans. Seems that around here the new speed on the highway is 80mph+ which of course as I've learned, is way outside of the lean burn mode. around the rural areas, speed is lower which of course would get me higher mpgs.

sorry to hear someone backed into your car!! Hope it's not that bad of damage!

I usually keep my tires around 33psi, haven't been driving this car much (was with other family members) but it's back to me having it. And having to remember all these tweaks to get the mpgs!
  Reply With Quote
Old 12-29-2015, 08:32 PM   #33 (permalink)
Rob
 
1hondaman's Avatar
 
Join Date: Dec 2015
Location: Tyler, Texas
Posts: 13

Silver Bullet - '00 Honda Civic HX
Thanks: 14
Thanked 1 Time in 1 Post
O-2 Sensor add-on in HX

When my car is in LB the commanded AFR's from the ECU seems to stay ~20.5.
When not in LB the commanded AFR is ~14.6

FIREHAWK618 Where did you plumb in the O-2 Sensor to get your AFR readings ? Did you weld in a "bung" at the upstream side of the cat in the exhaust manifold ? Did you find a crack in your exhaust manifold ?
  Reply With Quote
Old 12-30-2015, 01:18 PM   #34 (permalink)
Furry Furfag
 
Baltothewolf's Avatar
 
Join Date: Nov 2013
Location: Apple Valley
Posts: 2,084

Winsight - '00 Honda Insight
90 day: 56.69 mpg (US)

Miaderp - '95 Mazda Miata
90 day: 28.53 mpg (US)
Thanks: 67
Thanked 406 Times in 311 Posts
Wideband o2 sensors must be welded UPSTREAM of any catalytic converters. Downstream will scew accuracy.
__________________

  Reply With Quote
Old 01-06-2016, 10:53 AM   #35 (permalink)
Rob
 
1hondaman's Avatar
 
Join Date: Dec 2015
Location: Tyler, Texas
Posts: 13

Silver Bullet - '00 Honda Civic HX
Thanks: 14
Thanked 1 Time in 1 Post
More Lean Burn 2000 HX

Here is an up-date I posted on Honda-Tech that I copied and pasted here.

If you see my earlier post (12/20) I claimed no cracked exhaust manifold. WRONG ! Added to that was the plugged EGR ports which I have cleaned and posted photos on EcoModder. So once again THANK YOU for bringing this to my attention. The crack is small and I am going to attempt to weld it up at the same time I weld in a 0-2 bung for the new AFR gauge I just ordered.
Other news; With the instruction of Brucepick I have programmed the SG to read Lean Burn. This LB can be achieved but not consistently. At times it looks like LOD is the parameter to kick it out and at others it looks like 2500 RPM will throw it out. I suspect I will never run down just what does kick it out as the ECU is busy making calculations by reading a whole array of inputs.
Once the manifold/cat-con is welded up and the AFR gauge is installed I will have more to report.
Those here on the site may say to me "buy a new manifold, at 214K on the clock you are due for one - the honeycomb media is shot by now". Being frugal, this is not my first move but if there is sufficient evidence to do so, let me know. Thanks.
  Reply With Quote
Old 08-11-2016, 06:19 AM   #36 (permalink)
EcoModding Lurker
 
Join Date: Aug 2016
Location: New Zealand
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Bumping this thread, what octane fuel are you guys running in these? I'm using 95ron (I think what you guys stateside call 91), anyone used a lesser or greater octane? Was the economy difference negligible? Could running in lean burn afr be dangerous on 91ron?
And on the EGR setup, was it full of carbon at higher milages? Any gain on blocking it off? Does the US car have a single wire o2 sensor?
Mine is the japanese import EK hatch with D15B '3 stage vtec' and 1st gen cvt. It runs at bang on 2500rpm at 100km/h, seems to work best at around 90-95km/h with the gearbox in E mode (buttons on steering wheel).
  Reply With Quote
Old 08-11-2016, 07:24 AM   #37 (permalink)
Needs More Duct Tape
 
MPGomatic's Avatar
 
Join Date: May 2012
Location: the swamps of jersey
Posts: 155

Slambo - '99 Honda Civic HX
90 day: 44.21 mpg (US)
Thanks: 62
Thanked 81 Times in 42 Posts
I run 87 octane (US) E10 Regular primarily and have run some 91 octane E10 Premium tanks. Differences were negligible.

I've run two tanks of 87 octane E0. The slight bump in MPGs wasn't worth the added cost.

I'd like to roll the dice on a couple of tanks of E15 and E30 to see what happens, but I need to do a bit more research first.

My HX lacks cruise control, so highway tests are (more) prone to fluctuation.



Quote:
Originally Posted by zeroyon223 View Post
Bumping this thread, what octane fuel are you guys running in these? I'm using 95ron (I think what you guys stateside call 91), anyone used a lesser or greater octane? Was the economy difference negligible? Could running in lean burn afr be dangerous on 91ron?
And on the EGR setup, was it full of carbon at higher milages? Any gain on blocking it off? Does the US car have a single wire o2 sensor?
Mine is the japanese import EK hatch with D15B '3 stage vtec' and 1st gen cvt. It runs at bang on 2500rpm at 100km/h, seems to work best at around 90-95km/h with the gearbox in E mode (buttons on steering wheel).
__________________
Ain't Fuelin' - The Beater Build Show :
https://www.youtube.com/playlist?lis...R754kIg_V8Aahm
  Reply With Quote
Old 08-14-2016, 03:19 PM   #38 (permalink)
5 pin sensor
 
Join Date: Sep 2014
Location: Dallas
Posts: 350

Zippy - '96 Honda Civic Hx
Team Honda
90 day: 40.77 mpg (US)

Boring - '11 Ford Fusion Sel
90 day: 21.88 mpg (US)
Thanks: 38
Thanked 73 Times in 56 Posts
I'm back again, I currently have 2 1997 civic hx's. If you have any questions about lean burn post up.

To get the most out of a civic hx you need to do regular maintenance to the ignition system, primarily spark plugs and wires

It can be hard to determine when the car is in lean burn without any instrumentation. I highly reccomend just a simple vacuum gauge to see when your lean burn engages. The vacuum gauge is also very beneficial for staying in lean burn, and maximizing fuel mileage by showing if you have a steady foot on the pedal
__________________
Current: 1997 civic lx
Past: 1998hx/1996hx/1997lx/1997hx Cali/1997hx
OG lean burn member

My civic thread
  Reply With Quote
Old 08-15-2016, 12:20 PM   #39 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,041

CM400E - '81 Honda CM400E
90 day: 58.68 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: 2,389
Thanked 2,435 Times in 1,469 Posts
Welcome back.
__________________
Current project: Adding regenerative braking to the Mirage
  Reply With Quote
Old 08-15-2016, 12:49 PM   #40 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 59.78 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 1,897
Thanked 1,602 Times in 1,088 Posts
Quote:
Originally Posted by Chrysler kid View Post
... I highly reccomend just a simple vacuum gauge to see when your lean burn engages. The vacuum gauge is also very beneficial for staying in lean burn, and maximizing fuel mileage by showing if you have a steady foot on the pedal
Welcome back. So does the vacuum gauge help you stay in lean burn in any way besides the steady foot? Does it help you detect the transition to lean burn, for example? And do you have an UltraGauge, Scangauge, or other OBD2 data reading device, such as the torque app?

__________________


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

  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