1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

a fun little carb issue

Thread Tools
 
Search this Thread
 
Old 03-22-10, 05:32 PM
  #1  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
a fun little carb issue

I've searched, and searched, I just can't find the right words to describe.

1985 1.1

Sterling Nikki about a year old, straight from sterling
mechanical secondaries
rats nest removed
carter fuel pump and regulator

I took off the air filter housing because she wont idle right.

While running the front float is full and the back float bowl is half.

The front primary is always going (too much) the back is dry unless on the gas.

The front secondary at idle is dripping every now and again, as the back is dry, unless revved to engage secondaries.

I think its too young of a carburetor for anything internal to be wrong, but it sure seems like it. Maybe clogged? I'm not that much of a carb guy so I can't be sure on how to go about this.

(front is closest to the front of the car, and back is towards the back)

Last edited by 1stGenJake; 03-22-10 at 05:34 PM. Reason: forgot some stuff
Old 03-22-10, 06:13 PM
  #2  
We're All Fkd..

iTrader: (16)
 
AcidAngel7477's Avatar
 
Join Date: Nov 2005
Location: Whittier,CA
Posts: 8,725
Received 2 Likes on 2 Posts
maybe sterling can chime in and help..or you can contact him here..or via email.

:AA:
Old 03-22-10, 06:24 PM
  #3  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
Yeah I thought about that, and it would seem to be the best start... But I'm not going to lie, I can't understand half the stuff that guy is talking about, and it really makes me feel like a dumb ***.


Edit: Does anyone know where to get a new fuel check valve? Seems like no one has them.
Old 03-22-10, 07:12 PM
  #4  
Ricer

iTrader: (4)
 
IanS's Avatar
 
Join Date: Jun 2004
Location: Washington, Iowa
Posts: 4,424
Likes: 0
Received 1 Like on 1 Post
Could be also that your front float is sticking causing it to overfill as you describe. Try (when its running and being too full) to tap lightly on the top of the carb and see if after a bit the fuel level is in the middle like it should be. The needles and seats (what controls the amount of fuel in your bowl via the floats) tend to have a break in period and can get "hung up" from time to time for a while.
Old 03-22-10, 07:24 PM
  #5  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
Alright I'll try that tomorrow, I've lost all my daylight today.
Old 03-22-10, 07:26 PM
  #6  
Ricer

iTrader: (4)
 
IanS's Avatar
 
Join Date: Jun 2004
Location: Washington, Iowa
Posts: 4,424
Likes: 0
Received 1 Like on 1 Post
As in the other thread, yeah check your fuel pressure is low enough. However, normally if the pressure is too high you get the problem on both front and rear not just front. Its good to check anyways just to be sure though.
Old 03-22-10, 07:59 PM
  #7  
We're All Fkd..

iTrader: (16)
 
AcidAngel7477's Avatar
 
Join Date: Nov 2005
Location: Whittier,CA
Posts: 8,725
Received 2 Likes on 2 Posts
that's what i was thinking as well.

:AA:
Old 03-22-10, 09:41 PM
  #8  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
I may have the wrong FPR... I will check for sure tomorrow.
Old 03-23-10, 12:43 AM
  #9  
Senior Member
 
Oneiros's Avatar
 
Join Date: Nov 2009
Location: Australia
Posts: 346
Likes: 0
Received 1 Like on 1 Post
Yep definitely sounds like the front bowl is flooding, could be that the needles are binding like suggested above, or the seat could have even come loose.

If the tapping trick doesn't fix it, you may have to remove the air horn and check the needles and seats, float rise and drop.. Just look for differences between both sides at first, might be something obvious once you take a peek
Old 03-23-10, 02:58 PM
  #10  
Lives on the Forum

 
Kentetsu's Avatar
 
Join Date: Jun 2004
Location: Grand Rapids Michigan
Posts: 11,359
Received 14 Likes on 11 Posts
Contact Sterling through email or at his forum, www.sterlingmetalworks.com/bymc

Why go anywhere else seeking answers on a carb he built? And if you don't understand what he is telling you, then let him know that.

But by the sound of things, your front float is hanging up or the needle is not seating properly. Should be a very simple fix. But whatever you do,

DO NOT ATTEMPT TO ADJUST YOUR FLOATS!!!!





.
Old 03-23-10, 05:48 PM
  #11  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
Haha thanks kentetsu, guys ill set it up.
Old 03-23-10, 06:08 PM
  #12  
We're All Fkd..

iTrader: (16)
 
AcidAngel7477's Avatar
 
Join Date: Nov 2005
Location: Whittier,CA
Posts: 8,725
Received 2 Likes on 2 Posts
let us know what happen's..

:AA:
Old 03-23-10, 07:22 PM
  #13  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
Alright tapping it didn't work. I hate to start pulling this apart so I'm gonna tear into a dummy Nikki and you guys have given me some good info on what I'm looking for. Ill keep you guys updated, thanks again guys.
Old 03-23-10, 07:57 PM
  #14  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
Done with that. In the bowls there is a lot of debris. Maybe rust from the tank... floats seem alright, but I'm not sure on where to go from here.
Old 03-23-10, 09:08 PM
  #15  
Dreamin of drivin my 7!
iTrader: (18)
 
installer67's Avatar
 
Join Date: Feb 2009
Location: Seabeck, Washington
Posts: 1,073
Likes: 0
Received 1 Like on 1 Post
Follow Kentesu's advice and go to Sterlings site and ask for help on the Backyard Mechanics Forum.
Old 03-25-10, 08:36 PM
  #16  
Lives on the Forum

 
Kentetsu's Avatar
 
Join Date: Jun 2004
Location: Grand Rapids Michigan
Posts: 11,359
Received 14 Likes on 11 Posts
He did. I advised him to clean the crap out of the bowls, as that was probably interfering with the sealing of the float needle.
Old 03-26-10, 10:42 PM
  #17  
need hood

Thread Starter
 
1stGenJake's Avatar
 
Join Date: Oct 2006
Location: Kansas City
Posts: 160
Likes: 0
Received 0 Likes on 0 Posts
Just to update, I cleaned the rusty debris out. I also dropped my fuel tank... i need to get it boiled and sealed. badly. I also removed my radiator, found a coolant leak. While I was in there I also gutted anything I don't need and scrubbed everything down. Lot a work but it looks a hell of a lot better. Thanks guys.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rgordon1979
3rd Generation Specific (1993-2002)
40
03-15-22 12:04 PM
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
ZacMan
Build Threads
4
09-19-15 09:20 PM
Steven_McKinley
General Rotary Tech Support
12
09-05-15 10:48 AM



Quick Reply: a fun little carb issue



All times are GMT -5. The time now is 06:26 AM.