I've just got my Murena 2,2 some month ago, and I am now fighting with a caburator problem.
When the engine is hot (no choke), it dies if I, from idle, presses the pedal too fast.
If I presses the accelerator pump immediate before pressing the throttle, it all works okay.
The accelerator pump has been adjusted so it is being pressed immediately, when the throttle moves.
The caburator has been separated, cleaned and a complete gasket kit has been fitted.
I am not quite sure about the ignition adjustment!
I guess the first mark on the Belking housing, towards the front, is the O.T point, and every mark is -2 deg. The ignition is placed in the middle of all the marks, which should be - 5 deg.
Is correct?
No, it should be 10 degrees before TDC, and since the marks are 0, 4, 8, and 12 degrees BTDC the flywheel mark should be midway between the 8 and 12 marks, static or idling, without the distributor vacuum connected.
The car is fitted with a KN filter. Is it possible that it gets too much air?
The volume of air in, is controlled by the throttle and the venturi size, so if the carb. is standard the only problem that you get from fitting a K&N Filter is that you will be breathing hot air from the top of the engine bay, when it would be better to have cold air from lower down as with the original air filter and intake system.
I can drive the car, but it is annoying that I have to keep the rewindings high when I have to start.
Does anyone have suggestion?
First, if the car is stalling when you snap the throttle open quickly, it implies the mixture is too weak and is not richening up fast enough. The action of the pump jet has to be right, and it sounds like it is not, but the retarded timing won't help, so put the timing right first. You don't say, but I assume you have the standard progressive twin venturi down-draught carburettor? Is it the original Solex?
Next, do the revs. increase O.K. if you open the throttle slowly? Can you see the pump jet spray as you open the throttle? Is the float level correct? Are the jet sizes correct? In fact is the carburettor actually the correct one? Please let us have the full spec. off the carb. so I can see if it right, as there are some wrong ones fitted to various cars that will never work properly! The spec. should be 34CIC... I want to see the rest of it please. Also on the lower flange is a long number like 12345.000 What is this please? These will tell me if you have the right carb. or not.
Once I have these and know we are dealing with the correct carb. we can go from there.
Roy