I have a 1989 Nissan Sentra 1.6L 4-dr sedan and had the same problem.
The problem is the pressure plate. It is worn and doesn't push the gear into place and hold it the way it should. I have pictures of it on my website so you know EXACTLY what it looks like. here is the address:
You'll have to call around. Looking on the Net shows that the price can vary quite a bit from place to place. It shouldn't be over $100 for the plate. It's about the size of a dinner plate. that is rong it is a bad sinkro if it was the plate it would do it in all gears Have to agree with the last line, I have just repaired mine. The new gear is very expensive, but the old one can be re-cut which is cheaper and seems to work fine.
Motorweek - 1987 Nissan Sentra 26-5 was released on: USA: 6 October 2006
Motorweek - 1987 Nissan Sentra SE-R - 26.51 was released on: USA: 24 August 2007
Motorweek - 1987 Nissan Sentra SE-R 26-51 was released on: USA: 24 August 2007
http://autorepair.about.com/od/enginefiringorders1/ Specifically, for the 1987 Nissan Sentra: http://autorepair.about.com/library/firing_orders/bl-nissan-firing-87.htm The firing order is 1-3-4-2
.044 will work out just right for you. good luck
You can find the PCV valve for your 1987 Nissan on top of the engine. The PCV valve will be near the air filter housing.
Could be as simple as needing a tune up with spark plugs, spark plug wires, distributor cap and rotor, air and fuel filters.
It is on the passenger side floorboard behind the kick plate( which will be on the right)
A Different World - 1987 Sometimes You Get the Bear Sometimes the Bear Gets You 1-7 was released on: USA: 19 November 1987
AnswerIt probably needs a tuneup.check your mass air flow meter