q-jet help

[MrQuick]

a year isn't very long but that would depend on the fuel used.

with the car not running, remove the air filter, open the choke (you will need to hold open or do it with a hot choke) cycle the throttle and obeserve the accelerater pump stream. Should be an instant, nice and steady stream.

Pumping the torque pedal with a dry carb can kill the pump diaphram (especially plunger type) and will cause a lean accel issue aka off idle stumble. When we start a stored car I like to either prime the carb with a little fuel down the vent tube and then slowly cycle the throttle a few times till I get a fuel stream or start it on ether then cycle the throttle after it fills ensuring that it gets well lubricated.



Also look for flow. A sticking needle seat can cause a hard start from too much flow or not enough fuel. At idle you can use a mirror and flashlight to pear down the carb venturies to look for puddling or large droplets forming around the venturies. You should see no flow at idle.
The floats get saturated on those carbs so inspect it if you can.


If the plugs are wet and dark I alway like to replace them. Its a cheap reassurance. I have seen alot of guys chasing their tails only to find they had fowled plugs. This is after they swore that they have cleaned them and 4 + hours of failed trouble shooting.


Vince