[james m]

i have a nissan b13 with a ga 15 engine.it starts then goes off,i suspect a case leanness because when i put my hand to partialy block the airflowmeter,thus allow more air to pass through the sensor passage,it reponse well.i have tried adifferent airflowmeter , eccs but nothing doing...

 

[V i V i D 200sx]

could be a vacuum leak

 

[SergioCR]

...have you checked the timing and idle speed?