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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-22-2016, 04:13 PM   #21 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,155 Times in 1,463 Posts
Quote:
Originally Posted by CivicMPG View Post
... to get a better understanding of what my car does normally, this tank I am just going to drive "normal" without being conscious of trying to save gas and increase mpg, and see what it would get "normally", and then I can get a better idea of how my personal driving is improving upon it and go from there.
Good idea, though the ongoing stalling indicates a problem that could be depressing your MPG numbers. Gotta get that sorted-out before you can be fully confident that you know what normal performance really is. Also, when you refuel, the best way to ensure relatively accurate numbers is to use the same pump at the same station, fueling the car at the slowest automatic speed and always stopping on the first "click." No topping off. This eliminates pumping variations that can skew your MPG calcs.

Quote:
Originally Posted by CivicMPG View Post
On a side note from that, the car did die on my going down the road again yesterday after work. I rolled to a stop and it started right back up. it doesn't run rough or have any hicups, it just died. Anyone have any ideas?
This is possibly going to be a PITA to sort out... I would need quite a bit f trouble-shooting time. Maybe there is an open in a wire that intermittently fails. But if it is not setting off a CEL, then it could be something kinda obscure, like a failure in the distributor of some kind. I had an ignition coil problem that took a while to identify... I thought it was the MAP, then the fuel pump, and ultimately it was the coil, but only once the whole engine had gotten good and hot for a 25 minute drive, then the coil would expand in the heat and fail. Felt really good when I finally identified it.

"Test, don't guess." The factory service manual will have trouble shooting flow charts... Good luck!!

__________________
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
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-23-2016, 03:19 PM   #22 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,409

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 65.78 mpg (US)
Thanks: 1,008
Thanked 681 Times in 401 Posts
I don't remember if stalling is one of the symptoms of a failing main relay, but it's a common problem on these cars. Cracked solder joints on the relay's circuit board. Easy and free fix. Google it.
__________________

  Reply With Quote
Old 09-23-2016, 11:03 PM   #23 (permalink)
Master EcoModder
 
Join Date: Jan 2015
Location: Atlanta area
Posts: 410
Thanks: 966
Thanked 74 Times in 63 Posts
Fuel filter?
  Reply With Quote
Old 09-24-2016, 08:45 PM   #24 (permalink)
EcoModding Lurker
 
Join Date: Sep 2016
Location: cleburne, tx
Posts: 9

'91 Civic - '91 Honda Civic LX
90 day: 35 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
So good news I have verified that the A/C belt is isolated and can just cut it off. Problem is getting to it to cut it off. haha. i'll have to have more time for that.

But on a good note, or rather confusing to a point. I was down to about half a tank again so I filled up and my MPG while driving normal and having some fun with the car, going up to 5k RPM frequently and letting the engine breathe, I just recorded 35mpg. Am I missing something? lol.
  Reply With Quote
Old 09-24-2016, 08:53 PM   #25 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,155 Times in 1,463 Posts
Quote:
Originally Posted by CivicMPG View Post
So good news I have verified that the A/C belt is isolated and can just cut it off. Problem is getting to it to cut it off. haha. i'll have to have more time for that.

But on a good note, or rather confusing to a point. I was down to about half a tank again so I filled up and my MPG while driving normal and having some fun with the car, going up to 5k RPM frequently and letting the engine breathe, I just recorded 35mpg. Am I missing something? lol.
Half a tank is just five gallons. Pumping error could account for the difference. Or it could be something related to the intermittent stalling you are experiencing. Or is could be time of day, heat, humidity. ... a quirk in the driving style. There are lots of variables. The results of one half-tank refill are not conclusive. Sounds like you had fun, though. One of the great things about these cars is how much fun they are driving around--and how they go go go even when there are troubles mechanically.
__________________
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
Old 09-24-2016, 08:55 PM   #26 (permalink)
EcoModding Lurker
 
Join Date: Sep 2016
Location: cleburne, tx
Posts: 9

'91 Civic - '91 Honda Civic LX
90 day: 35 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by California98Civic View Post
Half a tank is just five gallons. Pumping error could account for the difference. Or it could be something related to the intermittent stalling you are experiencing. Or is could be time of day, heat, humidity. ... a quirk in the driving style. There are lots of variables. The results of one half-tank refill are not conclusive. Sounds like you had fun, though. One of the great things about these cars is how much fun they are driving around--and how they go go go even when there are troubles mechanically.
Thanks, should I wait next time and get closer to full tank of gas to get more accurate mpg readings?
  Reply With Quote
Old 09-25-2016, 02:33 AM   #27 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,409

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 65.78 mpg (US)
Thanks: 1,008
Thanked 681 Times in 401 Posts
Quote:
Originally Posted by CivicMPG View Post
Thanks, should I wait next time and get closer to full tank of gas to get more accurate mpg readings?
I always run down to empty for better accuracy.
__________________

  Reply With Quote
Old 09-25-2016, 03:04 PM   #28 (permalink)
Red Light Avoider
 
pletby's Avatar
 
Join Date: Jul 2010
Location: Winnipeg, Manitoba, Canada
Posts: 296

My Civic - '00 Honda Civic DX
Team Honda
90 day: 46 mpg (US)
Thanks: 114
Thanked 47 Times in 34 Posts
I find it helps to run through a full tank too especially if I want to compare changes I've made. That way I don't have to wait for it all to average out over several tanks.

__________________


  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com