|
|
Browsing this Thread:
1 Anonymous Users
|
|
Carby flooding. |
|
No life (a.k.a. DattoMaster)  
Joined:
2008/1/20 11:52
From Perth WA AUS
Group:
Registered Users
|
One of my Dellorto DHLA 40 carbies keeps flooding, just wondering if anyone else has had the same problem.
The first time it happened I thought it was grit in the fuel, cleaned it out and it worked well, two days later ( after not starting the car ) it was flooding again.
I reset the float and it seemed fine again, then a couple of days later its flooding again! I checked the needle of course but noticed black marks on the inside of the fuel bowl, looks to me like the float is scraping/sticking on the inside of the fuel bowl.
The fuel is flooding the carby and also seeping out over the outside of the carby a bit.
Any advice would be appreciated, thanks.
Posted on: 2010/9/8 10:42
|
|
_________________
Datsun 1200 2Dr sedan.
|
|
|
Re: Carby flooding. |
|
Home away from home  
Joined:
2010/2/13 1:35
From Ringwood, Melbourne, AUS
Group:
Registered Users
|
DHLA carbs are really sensitive in regards to fuel level. Check your fuel pressure, no more than 4 psi. Check the needle and seat, any wear fit new ones. Check the float level, really sensitive to this! Here is a good thread regarding setting an exact fuel level: http://www.sideways-technologies.co.u ... .pl/Blah.pl?m-1201970113/
Posted on: 2010/9/8 10:48
|
|
_________________
Deano
|
|
|
Re: Carby flooding. |
|
No life (a.k.a. DattoMaster) Joined:
2008/1/20 11:52
From Perth WA AUS
Group:
Registered Users
|
Fuel pressure is 3psi.
Needle and seat look good.
I will double check float level, thanks for the link I'll check it out.
Posted on: 2010/9/8 11:04
|
|
_________________
Datsun 1200 2Dr sedan.
|
|
|
Re: Carby flooding. |
|
No life (a.k.a. DattoMaster) Joined:
2008/1/20 11:52
From Perth WA AUS
Group:
Registered Users
|
Pretty sure the float is hitting/jamming on the side of the chamber, any other ideas people?
Posted on: 2010/9/8 14:23
|
|
_________________
Datsun 1200 2Dr sedan.
|
|
|
Re: Carby flooding. |
|
No life (a.k.a. DattoMaster) 
Joined:
2009/8/26 6:58
From mandurah
Group:
Registered Users
|
could it be too much flow but the right pressure ?? if the pressure is the same then if you increase the flow i am guessing that it will flood
Posted on: 2010/9/8 14:51
|
|
_________________
77 1200 ute
77mm bore a15 ,12:1 comp
ported and reconed h89 head
fairly aggro cam ,billet rocker spacers
twin 40mm solex carbs on bpro manifold
MSD 6al2 with 2 step limiter
4speed 60a box
hd clutch
2 inch exhaust
locked 4:11 ute diff
...
|
|
|
Re: Carby flooding. |
|
No life (a.k.a. DattoMaster) Joined:
2009/8/26 6:58
From mandurah
Group:
Registered Users
|
could you run a bigger line from the pump to the carbys ,maybe that would help if it has something to do with flow ??
Posted on: 2010/9/8 14:53
|
|
_________________
77 1200 ute
77mm bore a15 ,12:1 comp
ported and reconed h89 head
fairly aggro cam ,billet rocker spacers
twin 40mm solex carbs on bpro manifold
MSD 6al2 with 2 step limiter
4speed 60a box
hd clutch
2 inch exhaust
locked 4:11 ute diff
...
|
|
|
Re: Carby flooding. |
|
Home away from home Joined:
2010/2/13 1:35
From Ringwood, Melbourne, AUS
Group:
Registered Users
|
If the float is sticking that will definately cause flooding, can you tweak the float to clear? The alloy is pretty pliable usually.
Posted on: 2010/9/9 0:04
|
|
_________________
Deano
|
|
|
Re: Carby flooding. |
|
No life (a.k.a. DattoMaster) 
Joined:
2008/6/2 10:46
From hastings,vic
Group:
Registered Users
|
pressure building in tank over couple of days??????
raising above 3-4 psi?
crack fuel cap and see if still dose
Posted on: 2010/9/9 0:09
|
|
_________________
taking up room at home
3 now 2 1200 sedans,3 now 2 1200 coupes,3 now 2 1200 utes
1 1000 wagon,2 s13 silvia's,tranzit tray
hzj75 cruzer tray(for sale)
and allways changing
|
|
|
Re: Carby flooding. |
|
Just can't stay away  Joined:
2008/10/30 0:14
From Melbourne
Group:
Registered Users
|
If everything measures to spec them maybe the float is loose on the pivot pin, wobbling around the chamber and snagging on the float chamber walls. Fix is to carefully remove pin and float and rework the section of the float that wraps around the pin so it is a tighter clearance fit on the pin. Then reassemble.
BEWARE - the float pin need to be tapped out with a very small pin punch while carefully supporting the one leg that clamps the pin. The alloy legs are mega fragile. Don't ask how I know.
Posted on: 2010/9/9 3:58
Edited by ddiesel on 2010/9/9 23:38:04
|
|
|
|
|
Re: Carby flooding. |
|
Moderator  
Joined:
2001/5/3 7:04
From Kent, WA
Group:
Registered Users
Contentmaster
Usermaster
|
Extra "flow" fuel pump won't cause flooding.
Posted on: 2010/9/9 4:35
|
|
|
You can view topic.
You cannot start a new topic.
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.
|
Transfer
