Nissan Repair: 240sx, crankshaft position sensor, air flow meter

Question
my question is my 240sx when i take out spark plug wire #1 it does not do anything but when i take out #2#3#4 it shakes like it wants to turn off also has check engine light on i also wanted to know how can i check it

Answer
Panchito,

Replace the sparkplug wire and sparkplug for number 1 hole.  That would be the first thing to do to see why it is not firing.  Other sources could be a burnt valve or blown rings.  To check the comptuer codes do the following:

Diagnostic Trouble Codes - 1987
Nissan
11     Crankshaft Position Sensor
12     Air Flow Meter
13     Cylinder Head Temperature Sensor
21     Ignition Signal
22     Fuel Pump
23     Throttle Valve Switch
31     Load Signal
32     Start Signal
41     Fuel Temperature Sensor
44     System Okay
1.   Verify that diagnostic mode slesctor is turned fully counterclockwise.
2.   Turn ignition switch ON.
3.   Make sure inspection lamps stay on. (Bulb check.)
4.   Turn diagnostic mode selector fully clockwise.
5.   Make sure inspection lamps display code 23 and 31.
6.   Depress accelerator pedal and release.
7.   Make sure inspection lamps display code 31.
8.   Start engine, apply brakes and shift into "D" position.
9.   Make sure inspection lamps display code 31.
10.   Turn a load switch OFF-ON-OFF. (A/C switch, Headlight switch etc.)
11.   Shift into "P".
12.   Make sure inspection lamps display code 44. Any other code is a DTC.