Sounds like a bad fuel injector. You may be getting the correct voltage at
each injector, but you have to check the resistance of each injector.  My 90
Maxima injectors had two at 13 ohms.  But the other four registered
resistance of 58, 77 and one could not even give a constant reading. I
replaced all offending fuel injectors and she runs perfect. Shop manual
calls for resistance of 13 ohms.

Chris H
90 & 94 GXE's
06 SE

Just looking for advise to make sure I am on the right track. I have 91
sentra e 1.6 with 225,000 miles. Great car but everynow and then, I
loose a cylinder. For the longest I was thinking I was having
distributer troubles or a bad plug wire, but tonight the dead cylinder
came up again. I pulled the from the offending cylinder and tested
grounded against the engine, got a really strong spark. That to me
rules out the distributer, plugwire, and plug. Next, I took a
voltometer to the fuel injection socket and got a 13.86v good current.
I then tried touching a screwdriver to the top of the injector and did
hear the clicking but it did sound different that the first and fourth
cylinder yet louder than the second (odd, the second is firing right
now) .I am thinking with the extremely high milage that the injectors
are really clogged up and intermittently stop working. Am I on the
right track?