Go Back  R/C Tech Forums > General Forums > Nitro Off-Road
Nitro tuning issue? >

Nitro tuning issue?

Nitro tuning issue?

Old 08-31-2009, 02:22 PM
  #1  
Tech Apprentice
Thread Starter
iTrader: (2)
 
Join Date: Aug 2009
Posts: 77
Trader Rating: 2 (100%+)
Default Nitro tuning issue?

Hi, I have recently broken my losi 8ight 2.0 rtr buggy and encountered a problem post-tuning. Yesterday i ran it on the local track and it was running a little rich, I did not have time to really get it tuned so i packed it up and decided to to tune it today. I leaned everything up a bit (tuned according to "the tuning bible" the manual and some advice of my local rc enthusiasts), and the car was running great for about one tank of gas. All of a sudden the engine lost all its power, it could not even climb up the minor slope of the driveway. I am seriously dumbfounded at this and am hoping this is not a serious issue. I suspect a fouled glow plug, although i am not certain a fouled plug can have such a drastic effect on performance. Any input or help would be greatly appreciated, thank you.
rememberthis is offline  
Old 08-31-2009, 02:27 PM
  #2  
Tech Master
iTrader: (1)
 
killabud's Avatar
 
Join Date: Mar 2007
Location: SE PA
Posts: 1,170
Trader Rating: 1 (100%+)
Default

Did the motor suddenly get very rich when the power went away? Sometimes when a motor finally gets run in it can gets very rich and the temps drop. Try to explain what it sounds like at the moment.
killabud is offline  
Old 08-31-2009, 02:42 PM
  #3  
Tech Apprentice
Thread Starter
iTrader: (2)
 
Join Date: Aug 2009
Posts: 77
Trader Rating: 2 (100%+)
Default

Well the sound of the engine did not change, or if it did it was a very minor change. I don't think the mixture drastically became richer at the moment i lost power. I just took a look at my glow plug, it was fouled so I changed it (presumably from yesterday). I started the car and the engine will rev but the car will not move at all however the wheels will spin if i pick the car up and rev it a little. Maybe this is a clutch or clutch spring issue?
rememberthis is offline  
Old 08-31-2009, 03:02 PM
  #4  
Tech Master
iTrader: (4)
 
fatdaddy's Avatar
 
Join Date: Nov 2008
Location: Temecula, CA
Posts: 1,614
Trader Rating: 4 (100%+)
Default

clutch is always a good place to check if you have weird issues going on.

what are your motor temps?
fatdaddy is offline  
Old 08-31-2009, 03:05 PM
  #5  
Tech Apprentice
Thread Starter
iTrader: (2)
 
Join Date: Aug 2009
Posts: 77
Trader Rating: 2 (100%+)
Default

My motor temps ranged from 195-205 degree F. Does this sound like a clutch problem or something much worse?
rememberthis is offline  
Old 08-31-2009, 03:10 PM
  #6  
Tech Master
iTrader: (4)
 
fatdaddy's Avatar
 
Join Date: Nov 2008
Location: Temecula, CA
Posts: 1,614
Trader Rating: 4 (100%+)
Default

Originally Posted by rememberthis View Post
My motor temps ranged from 195-205 degree F. Does this sound like a clutch problem or something much worse?
it should still make some power at that range. i would definately check the clutch first, but its possible the balls have finally dropped on the motor and you can start leaning it out
fatdaddy is offline  
Old 08-31-2009, 03:18 PM
  #7  
Tech Apprentice
Thread Starter
iTrader: (2)
 
Join Date: Aug 2009
Posts: 77
Trader Rating: 2 (100%+)
Default

Ok, thanks for the help fatdaddy, ill go check that stuff out, hopefully get it going again soon!
rememberthis is offline  
Old 08-31-2009, 03:21 PM
  #8  
Tech Master
iTrader: (4)
 
fatdaddy's Avatar
 
Join Date: Nov 2008
Location: Temecula, CA
Posts: 1,614
Trader Rating: 4 (100%+)
Default

Originally Posted by rememberthis View Post
Ok, thanks for the help fatdaddy, ill go check that stuff out, hopefully get it going again soon!
its all good

get that thing down to the track and get racing!
fatdaddy is offline  
Old 09-01-2009, 02:49 PM
  #9  
Tech Master
iTrader: (34)
 
j_blaze14's Avatar
 
Join Date: Feb 2008
Location: Tampa, Fl
Posts: 1,693
Trader Rating: 34 (100%+)
Default

sound like flywheel nut loose? broken cvd or fallen pin, blown diff, loose grub screw on pinion. could be many things.
j_blaze14 is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.