Nissan navara 1986 2.4L petrol timing problem

For timing, on 1981 and later 4 cyl engines (from the Haynes manual):
1. Turn camshaft so both valves for #1 cylinder are closed, and turn the crankshaft so #1 piston is at top dead center (woodruff key should be pointing up).
2. Engage the camshaft sprocket (with stamped numbers facing out) into the timing chain, and install the chain around the crankshaft sprocket. The bright links on the chain should be aligned with the timing mark on the crankshaft sprocket (on the right side as you look at it) and with the number "2" stamped into the camshaft sprocket, which should also be on the right side as you look at it.
3. Install the camshaft sprocket onto the camshaft, aligning the camshaft dowel pin with the number "2" hole near the center of the sprocket.

For the firing order and wiring routing for the 8 plug 4 cylinder engine: (Plugs on the intake manifold side are coded "I", and on the exhaust manifold side are coded "E")

Wire to 1I should be connected to tower on the distributor facing directly to the front of the vehicle. Going counterclockwise from there, the order is (1I), 2E, 3I, 1E, 4I, 3E, 2I, and 4E.

For timing, on 1981 and later 4 cyl engines (from the Haynes manual):
1. Turn camshaft so both valves for #1 cylinder are closed, and turn the crankshaft so #1 piston is at top dead center (woodruff key should be pointing up).
2. Engage the camshaft sprocket (with stamped numbers facing out) into the timing chain, and install the chain around the crankshaft sprocket. The bright links on the chain should be aligned with the timing mark on the crankshaft sprocket (on the right side as you look at it) and with the number "2" stamped into the camshaft sprocket, which should also be on the right side as you look at it.
3. Install the camshaft sprocket onto the camshaft, aligning the camshaft dowel pin with the number "2" hole near the center of the sprocket.

For the firing order and wiring routing for the 8 plug 4 cylinder engine: (Plugs on the intake manifold side are coded "I", and on the exhaust manifold side are coded "E")

Wire to 1I should be connected to tower on the distributor facing directly to the front of the vehicle. Going counterclockwise from there, the order is (1I), 2E, 3I, 1E, 4I, 3E, 2I, and 4E.

Firing order and wiring diagram needed for 1985 Nissan 4 wheel drive. Four cylinder with 8 spark plugs

I had the same situation with an old Datsun Tracker I have been rebuilding and I solved it in the following way.
1 Find top dead centre for cylinder 1 (the one in the front of the engine). This will be when the keyway on the crankshaft is at the top and if the fanbelt pulley is on, the notch in the pulley will be exactly opposite the 0 timing mark on the timing plate. Rotate the engine with spark plugs removed and gearbox in neutral until you get this position. The easiest way to do this is to put a ratchet wrench on the mounting bolt for the fanbelt pulley. On my engine this was a 24mm socket.
2 Check the distributor with cap removed and see if the rotor arm is pointing at the number 1 spark plug lead. Follow the leads to check this carefully. This is to determine if the number 1 cylinder is on its firing stroke. If the rotor arm is not pointing at the number 1 spark plug lead lug in the distributor cap rotate the engine 1 full revolution. Align the marks as described in 1 above and check the distributor again.
3 Remove the timing chain tensioner.
4 Rotate the camshaft until the key or locating dowl pin for the timing chain gear wheel is vertical. In this position the inlet and exhaust valves for number 1 cylinder should be closed. You can see this because the inlet and exhaust cam lobes should be sticking up and not depressing the valves. This is the trickiest part because in muy case the engine was mounted canted over at an angle and it was difficult to judge. I used a steel rule to line up the cam shaft and gear wheel. I then fitted the timeing chain and rechecked the alignment. Tried it a tooth forward and checked, a tooth back and checked. Eventually when I was satisfied I found that there were other timing marks that lined up on the timing gear wheel and the camshaft bearing mountings. Remember to ension the timing chain in the correct direction (i.e. opposite to engine rotation direction).
5 Tighten up everything and replace the chain tensioning device.
6 Rotate the engine and check that the valves open and close in a logical way and don't hit the pistons. Firing order should be 1, 3, 4, 2. Be careful to check the firing order correctly in the distributor. In my case the distributor rotor rotates counter clockwise.
7 When you are happy with your set up reassemble the timing chain cover and tappet cover and start the engine. If you have changed the distributor set up set the distributor timing at top dead centre or -10 degrees.
8 The engine should run without a lot of backfiring. A lot of backfiring means the timing is wrong.
Good luck!!!