R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road > Onroad Nitro Engine Zone

Reply
 
Thread Tools Search this Thread
Old 04-27-2009, 10:45 PM   #1
Tech Rookie
 
Join Date: May 2005
Posts: 13
Default engine overheating help!?!

ok so I have my first nitro car(a used hpi rs4 rtr 3 evo +) and now that the weather was nice on sunday i finally took it out for a run...well Im not really sure what happened but after about 5 minutes of runnning I pull in and its running hot..real hot(399 degrees f) so I shut it right down and let it cool down and then tried to start it.....nothing....I take the the engine apart and check for damage but dont find anything that looks out of the ordinary and the engine still has compression....put it back in the car and get it to fire up..but have no throttle control( I forgot to hook up servo) so now ive isolated the problem to the carb. So I figure that it must be an air leak that caused it to lean out...does that sound possible? I noticed that the dust cover boot that wraps around throttle control arm has a rip in it. is that the problem? also the slide seems to be moving in and out as well as trning clockwise. is that normal? any help appreciated! thanks
samurai is offline   Reply With Quote
Old 04-27-2009, 10:51 PM   #2
Tech Adept
 
dawson714's Avatar
 
Join Date: Dec 2008
Location: anahiem hills CA
Posts: 141
Default

im not an expert on on road but if it has a 2speed tranny is it shifting into second?
if its not that could be the reason
__________________
T-Maxx 2.5
mugen prime 12
rustler xl-5
dawson714 is offline   Reply With Quote
Old 04-28-2009, 07:47 PM   #3
Tech Rookie
 
Join Date: May 2005
Posts: 13
Default

no its shifting thats what I was trying to setup while playing with it....
samurai is offline   Reply With Quote
Old 04-28-2009, 08:09 PM   #4
Tech Adept
 
dawson714's Avatar
 
Join Date: Dec 2008
Location: anahiem hills CA
Posts: 141
Default

ohh. r u running a high enough nitro percentage?
__________________
T-Maxx 2.5
mugen prime 12
rustler xl-5
dawson714 is offline   Reply With Quote
Old 04-28-2009, 08:46 PM   #5
Tech Master
 
JetMD's Avatar
 
Join Date: Jan 2006
Location: Richmond VA
Posts: 1,172
Trader Rating: 1 (100%+)
Default

It's really difficult to diagnose problems like this over the internet. Your best bet would be to take it to your local hobby shop or get an experienced friend to help you out.

With that said, if your slide is rotating, it sounds like your idle stop screw has backed out. There is a grove that the idle stop screw rides on and if it backs out too far, the slide will be able to spin around. You need to tighten the idle stop screw until you get the idle set correctly and then get the tune right and it shouldn't overheat any more.
__________________
www.vorra.org

MINO Racing
JetMD is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -7. It is currently 07:32 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net