My Turbulent is fitted with a Solex 32PHN-T Carb which has a 'flat spot'.
I can find plenty of info about PHN carb and others but nothing specific to the 32PHN-T...
I need to know because I have been plagued with this flat spot at circa 1500 rpm when the throttle is pushed open. Ok if you push slowly over this spot, but if too fast you get a selection of spits, barks and splutters until she picks up!
I must say rather than compensate for it I would prefer to get rid of it!
The carb only has slow running adjustment and one only mixture screw which I have played with endlessly.
I am wondering if an overhaul kit might solve the problem which may also be to do with ther accelerator pump..
Any ideas?
Anyone know where to get such a kit?
Any VW Gurus out there???
Help!!
John
VW SOLEX CARB.
Moderators: John Dean, Moderator
-
bertdeleporte
- Posts: 68
- Joined: Wed Jul 30, 2008 12:33 pm
- Location: France
Hello John,
I would not considere myself as a guru, just as an hobbyist in mechanics
I would look on the same direction as you pointed according to the symptoms you describe.
On those carbs, when looking on the net, constitution seems quite simple: you have the float assembly with its fuel stopping device, a flap for power, a flap for choke, one main jet, one idle jet, one emulsion tube, one accelerator pump, end of story. No army of needles, jet neddles, secondary circuits etc...
To check the accelerator pump is quite simple: the pump is under a square cover with four screws, the membrane can become porous with time. I don't know that exact type of carb, but most of them works the same: you have check valves in and out, the pump is actuated by the power lever. Two options:
1/when you dismantle, you can see light through pinholes in the membrane, it should be the cause of the problem, change it and try.
2/membrane looks OK, try to check the pump by itself, it can be the check valves. It is much more seldom, but it can happen.
If you can, send pics, of find a "local guru" to help you.
Bertrand
Looking fwd,
Bertrand
I would not considere myself as a guru, just as an hobbyist in mechanics
I would look on the same direction as you pointed according to the symptoms you describe.
On those carbs, when looking on the net, constitution seems quite simple: you have the float assembly with its fuel stopping device, a flap for power, a flap for choke, one main jet, one idle jet, one emulsion tube, one accelerator pump, end of story. No army of needles, jet neddles, secondary circuits etc...
To check the accelerator pump is quite simple: the pump is under a square cover with four screws, the membrane can become porous with time. I don't know that exact type of carb, but most of them works the same: you have check valves in and out, the pump is actuated by the power lever. Two options:
1/when you dismantle, you can see light through pinholes in the membrane, it should be the cause of the problem, change it and try.
2/membrane looks OK, try to check the pump by itself, it can be the check valves. It is much more seldom, but it can happen.
If you can, send pics, of find a "local guru" to help you.
Bertrand
Looking fwd,
Bertrand
-
rogerburge
- Posts: 12
- Joined: Fri Jan 11, 2008 11:31 am
- Location: Devon
-
bertdeleporte
- Posts: 68
- Joined: Wed Jul 30, 2008 12:33 pm
- Location: France
THANKS A MILLION
bertdeleporte wrote:Hello John,
I would not considere myself as a guru, just as an hobbyist in mechanics
I would look on the same direction as you pointed according to the symptoms you describe.
On those carbs, when looking on the net, constitution seems quite simple: you have the float assembly with its fuel stopping device, a flap for power, a flap for choke, one main jet, one idle jet, one emulsion tube, one accelerator pump, end of story. No army of needles, jet neddles, secondary circuits etc...
To check the accelerator pump is quite simple: the pump is under a square cover with four screws, the membrane can become porous with time. I don't know that exact type of carb, but most of them works the same: you have check valves in and out, the pump is actuated by the power lever. Two options:
1/when you dismantle, you can see light through pinholes in the membrane, it should be the cause of the problem, change it and try.
2/membrane looks OK, try to check the pump by itself, it can be the check valves. It is much more seldom, but it can happen.
If you can, send pics, of find a "local guru" to help you.
Bertrand
Looking fwd,
Bertrand
-
bertdeleporte
- Posts: 68
- Joined: Wed Jul 30, 2008 12:33 pm
- Location: France
