Iam working on an 96 850 non turboproblem is that the vehicle will stall out after 20 sec. on running I have noticed before vehicle starts to run rough and stall out that the spark drops off all cyl. I have replacedthe cam sensor, the crank sensor (pulse sensor). The previous garage has replaced cap, rotor, plugs,wires,ect sensor. I have also tried a known good coil. they are no codes in this vehicle.any help in this matter would be greatly appreciated[:-]

 

I failed to mention that the timing is on the mark and when the spark is lost I can give full throttle and I can regain spark for another 20 sec.Also after vehicle dies vehicle will restart with out a problem for 20 sec.and then die out again..[:@][][&o]

 

Have you checked the idle air control valve?

 

check the Cam position sensor plug for good connection.