I had to take of the camshaft sprockets when I replaced the head gasket, but I didn't mark them, now they are installed in the car, but when I try to start it, it misfires, even when all marks lined up, and distributor lined up.
And speaking of distributor, in the FSM it says to line up 2 marks then install it and make sure it sits like shown in the figure, but if installed according to the marks, it is WAY off compared to the figure shown.. I always gone by the figure, so the rotor points toward nr. 1 wire.

After several hours of checking all cables and fuel tubes, injectors etc, I thought maybe the sprockets where mounted on the opposite cam.?

Any idea?

 

Yes they are different and must go on its designated cam to maintain proper timing. Fortunately they are marked "LH" and "RH" so you can easily determine if you they mixed up.

 

Viewed from the tranny end looking toward the passenger side the L goes on the bank closest to the radiator and the R goes to the bank closest to the firewall.....these views were actually from the driver's view in a longitudally mounted vehicle (300zx/Pathfinder)...Remember that!