Go Back   EcoModder Forum > EcoModding > Off-Topic Tech
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-03-2009, 09:22 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Apr 2009
Location: n/a
Posts: 60

TBA - '07 Honda Fit
Thanks: 11
Thanked 9 Times in 6 Posts
Car doesn't bump start correctly?

I got a new car recently - a 1997 toyota celica.

After clutch starting, the car runs rough.

Normally, the car idles at around .24-.30 GPH. After clutch starting, the car drops to ~450 RPM and idles at .15-.17 GPH. It also runs noticeably rougher - the car starts vibrating. I got these numbers from my Scangauge that I have.

The car I had before this one was a 1999 Chevrolet Prizm. I noticed that the prizm didn't clutch start as smooth, but didn't have problems coming back up to regular RPM's right after.

What should I do about this? Should I continue to pulse and glide or should I stop until I figure out what the issue is?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-03-2009, 11:13 PM   #2 (permalink)
Left Lane Ecodriver
 
RobertSmalls's Avatar
 
Join Date: Aug 2008
Location: Buffalo, NY, USA
Posts: 2,257

Prius C - '12 Toyota Prius C
Thanks: 79
Thanked 284 Times in 197 Posts
Does the same thing happen if you use the electric starter to re-start the engine?

My Subaru's ECU is much better-behaved now that I've installed an engine kill switch instead of cycling the ignition. It idles very high for the first few minutes after you turn the key to ON. Maybe Toyota's ECU is doing something stupid, too. Try killing the engine by pulling a fuse, then push-starting, and see if it misbehaves then, too. If not, build a kill switch.

But yeah, low idle could be injurious to your engine.
  Reply With Quote
Old 10-04-2009, 02:25 AM   #3 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
My Father's S-10 won't clutch start, for some reason. The PassLock II security system kicks on, and it won't start until you turn the damn key to the start position.

I don't know if you're having a similar problem, but it's not as uncommon as you'd think.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 10-04-2009, 04:21 AM   #4 (permalink)
EcoModding Lurker
 
Join Date: Apr 2009
Location: n/a
Posts: 60

TBA - '07 Honda Fit
Thanks: 11
Thanked 9 Times in 6 Posts
What methods should I use to kill the engine without turning the key in order to try Robert Small's suggestion?
  Reply With Quote
Old 10-04-2009, 08:56 AM   #5 (permalink)
Left Lane Ecodriver
 
RobertSmalls's Avatar
 
Join Date: Aug 2008
Location: Buffalo, NY, USA
Posts: 2,257

Prius C - '12 Toyota Prius C
Thanks: 79
Thanked 284 Times in 197 Posts
Look in the owner's manual for fuses for the ignition and fuel delivery system. Park the car on Clutch Start Hill with the engine running. Pull a fuse. If the engine dies but the ECU keeps running, you've got the right fuse. Put it back in, release the handbrake, and away you go.
  Reply With Quote
Old 10-04-2009, 03:50 PM   #6 (permalink)
EcoModding Lurker
 
Join Date: Apr 2009
Location: n/a
Posts: 60

TBA - '07 Honda Fit
Thanks: 11
Thanked 9 Times in 6 Posts
"If the car dies but the ecu is still running"

How am I supposed to tell if this occurs?
  Reply With Quote
Old 10-04-2009, 05:16 PM   #7 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2009
Location: Portland OR
Posts: 204
Thanks: 1
Thanked 30 Times in 21 Posts
A lot of newer engine control systems will treat loss of rpm as a critical fault.
As well as the loss of oil pressure and loss of power steering pressure.

You may be fighting all the safety stuff that allows these 100K mile warranties to exist...

Dave
  Reply With Quote
Old 10-04-2009, 09:02 PM   #8 (permalink)
Left Lane Ecodriver
 
RobertSmalls's Avatar
 
Join Date: Aug 2008
Location: Buffalo, NY, USA
Posts: 2,257

Prius C - '12 Toyota Prius C
Thanks: 79
Thanked 284 Times in 197 Posts
Quote:
Originally Posted by HilseeJ View Post
"If the car dies but the ecu is still running"

How am I supposed to tell if this occurs?
Just don't pull the ECU's fuse. ;-)
  Reply With Quote
Old 10-05-2009, 02:26 AM   #9 (permalink)
Wannabe greenie
 
Join Date: Aug 2008
Location: Yorba Linda, CA
Posts: 1,098

The Clunker (retired) - '90 Honda Accord EX sedan
Team Honda
90 day: 29.49 mpg (US)

Mountain Goat - '96 Ford Ranger XLT 4x4 SuperCab
90 day: 18 mpg (US)

Zippy - '10 Kymco Agility 125
90 day: 65.03 mpg (US)
Thanks: 5
Thanked 53 Times in 40 Posts
My '90 Accord bump starts without a problem, but the '04 Saturn is more finicky--I have to have some significant RPMs going. I can't just bump it in first while going 2 mph or it'll give me a Check Engine warning and sometimes run roughly.

__________________

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric car conversion: Project ForkenSwift MetroMPG Fossil Fuel Free 1041 07-28-2014 10:19 AM
How to smoothly bump start / clutch start an engine MetroMPG Hypermiling / EcoDriver's Ed 76 03-22-2014 08:52 AM
EcoModding for Beginners: Getting great gas mileage. SVOboy EcoModding Central 55 08-21-2012 12:34 AM
I want to get to the bottom of this ethanol killing my mpg Nerys General Efficiency Discussion 175 08-16-2012 09:32 AM
Win $100.00 in Free Gas! Design Contest: Ecomod my Ride XFi EcoModding Central 127 02-17-2011 01:07 AM



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