conehead wrote:
I'm not sure what you mean, a fitting kit, a
rebuild kit A carb and manifold kit?? Why does
the comparison of year of your car /carb matter? etc etc

kelmo wrote:
BTW...the bath tub stoppers for cylinder caps is brilliant. I've been wondering what to do about that as OEM caps are no longer available. Do they fit tight enough?
Kelmo

Dodgeman wrote:
Quote:

Datsunitus wrote:
****UPDATE****
Tried blowing from the rear and carb filled up with gas then quickly died.

On top of the tank I checked the breather line and it seemed fine.

After numerous times trying to start went to remove gas cap and it was under alot of negative pressure.

****Question****
other then what I did what else could it be? When blowing from the front of the car into the fuel line I was able to blow gas out of the gas cap.

OK, I've sat in the corner for a while & had a think. Now I have a couple of questions.

Lets see.
1. You dismantled most of the fuel system & blew it clear. So that's all good.
2. You blew from the rear & the carb filled. Where did you blow FROM? Did you blow into the fuel tank filler?
3. You unhooked the fuel line from behind the rear wheel, ... then what? Did you simply let it drain into a container? I can't look while writing this so I will check later to see if you have a coupe [low fuel tank, under rear floor] or a sedan [high fuel tank, behind back seat.]
4. After trying to start the car with a full tank, you found a LOT of negative pressure in the tank. It didn't even start & it had a lot of negative pressure?
5. You blew from the engine end & fuel was ejected from the fuel cap? So the fuel cap will let fuel escape, but won't let air in? [negative pressure remember]

Just to amuse an old man, try starting it with the fuel cap off. If it starts, then screw the idle up to about 1000 or so & let it run for a few minutes. If it's still running, then refit the cap.
If it dies after another few minutes, [give it a chance] see if you can get the cap off before it dies completely.
If it suddenly picks up again then spend $29.17 & buy your car an early Xmas present from your Nissan dealers parts counter.

Dodgeman wrote:
Quote:

A14force wrote:
You aren't using a carb with an anti deiseling soleniod are you? That will stop fuel getting into you carb if it's not getting any power.

The anti dieseling solenoid will prevent fuel from flowing in the idle circuit only. Nothing else.
If it has failed, then the engine will not idle, but will run at all throttle settings above idle speed & it has no effect on fuel flow to the carb.

What will prevent fuel flowing to the carb?
1. No fuel in tank. [refill]
2. Blocked pickup in tank. [blow clear with air, then drain sediment from tank]
3. Damaged pickup in tank that works only when fuel is above a certain level. [replace pickup line]
4. Floating obstruction in fuel line to stock primary filter in engine bay. [disconect fuel line at both ends & blow clear with air]
5. Faulty or blocked primary filter. [replace]
6. Faulty rubber fuel line sections at filter & elsewhere on the suction side of the fuel pump that allow fuel pump to suck air periodically. [replace]
7. Faulty fuel pump. [Repair or replace]
8. Floating obstruction on pressure side fuel line from pump to carb. [Disconect at both ends & blow clear with air]
9. Obstruction in final filter. [small gauze strainer under needle & seat. Remove it to access this strainer.] [Strip & clean, or replace as necessary]
10. Faulty needle & seat. [replace]
[I have never personally encountered this problem, nor have ever heard of it happening to anybody I know in a 43 year career in & out of the motor trade.]

That should cover most possibilities.

A14force wrote:
You aren't using a carb with an anti deiseling soleniod are you? That will stop fuel getting into you carb if it's not getting any power.

cheater_5 wrote:
my guess is the needle and seat in the carb.
Has happened to me many many times before. Will be sticking etc. Best bet is to take the top of the carb off SLOWLY and remembering where everything goes, because there are a lot of things, linkages etc etc then checking the needle and seat.
Some have a mesh type filter just before it and can get clogged if crap gets through the fuel filter. Or the needle and seat might just be worn or old and doesnt want to work.

Other than that, if the pump is still pumping fine and the filter isnt clogged, then its either a block in the fuel tank breather creating a low pressure in there or a block in the fuel tank pickup. Possibly even a perished fuel line...

Id be checking the needle and seat first, for sure