Chasing a Tune

Reply

Old 08-06-2008, 10:59 AM
  #1  
Tech Master
Thread Starter
iTrader: (7)
 
Akhor's Avatar
 
Join Date: Feb 2008
Location: Alberta,Canada
Posts: 1,346
Trader Rating: 7 (100%+)
Default Chasing a Tune

I've got a new engine that I just cann't seem to get a tune on. Sometimes it will idle forever, other times not at all. I've tried re-setting to factory and going from there, but it was soo rich it just conked out.

However, before I left the track last night I found that the rubber hose leading from the air filter to the carb had a crack in it. Is it possible that this is the issue?
Akhor is offline  
Reply With Quote
Old 08-06-2008, 11:15 AM
  #2  
Tech Regular
iTrader: (5)
 
Join Date: May 2008
Posts: 461
Trader Rating: 5 (100%+)
Default

get a new air filter and then go from factory settings but just lean it out some from factory so its not so rich and then go from there
egobuster1 is offline  
Reply With Quote
Old 08-06-2008, 11:23 AM
  #3  
Tech Master
Thread Starter
iTrader: (7)
 
Akhor's Avatar
 
Join Date: Feb 2008
Location: Alberta,Canada
Posts: 1,346
Trader Rating: 7 (100%+)
Default

Ya I kinda figure that the hole in the air filter might be causing a huge issue.

I hope to find out this evening.
Akhor is offline  
Reply With Quote
Old 08-06-2008, 11:47 AM
  #4  
Tech Addict
iTrader: (10)
 
scoopdaloop's Avatar
 
Join Date: Jul 2008
Location: Texas
Posts: 533
Trader Rating: 10 (92%+)
Default

Yes that could be your problem, go ahead and get a new air filter. Make sure that your idle screw is set properly so that the same idle will be had each time.
scoopdaloop is offline  
Reply With Quote
Old 08-06-2008, 01:24 PM
  #5  
Tech Addict
iTrader: (7)
 
desertbird's Avatar
 
Join Date: Apr 2008
Location: Surprise, AZ
Posts: 551
Trader Rating: 7 (100%+)
Default

An air leak ANYWHERE in the engine system will cause erratic performance. This includes the engine's back plate, pinch bolt, carb seat, HSN needle housing, carb Slide/boot, Bearings, fuel lines, and gas tank. Some of these can be sealed i.e. back plate, pinch bolt, HSN housing... some need to be replaced i.e. gas tank, fuel lines, bearings, and carb slide boot.

Go through your entire system to ensure its tight if your engine has performance issue, even brand new engines can have air leaks.
desertbird is offline  
Reply With Quote
Old 08-06-2008, 01:37 PM
  #6  
Tech Elite
iTrader: (11)
 
jamminnay's Avatar
 
Join Date: Apr 2008
Location: IL
Posts: 2,021
Trader Rating: 11 (100%+)
Default

i had a brand new sirio evo 3 that leaked like crazy!!! a little sealent and she was good to go for about two gallons!!
jamminnay is offline  
Reply With Quote
Old 08-06-2008, 02:12 PM
  #7  
Tech Master
Thread Starter
iTrader: (7)
 
Akhor's Avatar
 
Join Date: Feb 2008
Location: Alberta,Canada
Posts: 1,346
Trader Rating: 7 (100%+)
Default

Originally Posted by desertbird View Post
An air leak ANYWHERE in the engine system will cause erratic performance. This includes the engine's back plate, pinch bolt, carb seat, HSN needle housing, carb Slide/boot, Bearings, fuel lines, and gas tank. Some of these can be sealed i.e. back plate, pinch bolt, HSN housing... some need to be replaced i.e. gas tank, fuel lines, bearings, and carb slide boot.

Go through your entire system to ensure its tight if your engine has performance issue, even brand new engines can have air leaks.

Good to know. I'll defiantly check it all out and report back!
Akhor is offline  
Reply With Quote
Old 08-07-2008, 08:12 AM
  #8  
Tech Master
Thread Starter
iTrader: (7)
 
Akhor's Avatar
 
Join Date: Feb 2008
Location: Alberta,Canada
Posts: 1,346
Trader Rating: 7 (100%+)
Default

Actually, I went through the fuel system last evening and found a hole in the gas tank when I pressure tested it.

So, I'm guessing this was the cause of my issue.
Akhor is offline  
Reply With Quote

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