I need the timing belt instalation diagrams for 4jx1 3.0L turbo desiel how can i get it pls

https://www.google.com/search?q=Need+a+fuse+diagram+for+2012+Volkswagen+jetta+se+2.5&biw=1362&bih=650&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjz0O-MzZrQAhVC6CYKHYj2C54QsAQIIw&dpr=1#tbm=isch&q=Timing+belt+diagram+for+2008+Volkswagen+Jetta+2.0L+turbo+FSI%3F
Hope this helps

Junked it, to old of post.

There is no belt that runs the Turbocharger. A Turbocharger uses the engines exhaust to spin a wheel that is attached to a compressor wheel.
Try this link for your correct belt diagram:http://lmgtfy.com/?q=Mazda+Millenia+s+2.3+belt+diagram

5.9 turbo diesel

The timing belt diagram for VW Passat 1.8 turbo 20v 1999, engine code apu

http://www.dieseltruckresource.com/dev/help-installing-serpintine-belt-t183515.html?&highlight=fan+belt+diagram

scroll down to the 6th post

Crankshaft match marks


Align marks on timing belt pulley and pump body.

Camshaft pulley alignment marks

1. Align marks on camshaft pulleys with alignment marks on seal plate.
2. Install timing belt. NOTE: No looseness should exist on the tension side and at the camshaft pulleys.
   
3. Loosen tensioner lock bolt.
4. Turn crankshaft 2 revolutions in direction of rotation and check that timing marks are still in alignment.
5. Tighten timing belt tension lock bolt to 27-38 ft lb (32-52 Nm).
6. Apply a force of 22 lbs to timing belt between camshaft sprockets.
7. Belt deflection should measure 0.30-0.33 in (7.5-8.5 mm)
8. NOTE: Replace tensioner spring if timing belt deflection is excessive.

Timing Belt Installation

1. Install lower timing belt cover.
2. Install upper timing belt cover.
3. Install power steering drive belt and adjust belt tension.
4. Install fan pulley.
5. Install generator drive belt and adjust belt tension.
6. Install A/C drive belt and adjust belt tension.
7. Install splash guard.
8. Install fan and fan shroud.
9. Install 4 fan bolts. Tighten to 24 ft lb (33 Nm).
10. Install fan shroud mounting bolts.
11. Install fresh air duct.
12. Connect hose to resonance chamber.
13. Connect battery negative cable.

You could check the intake and/or turbo for leaks. Or even make sure turbo is working. It will be very low power if there is no boost pressure.

if its black smoke most of the time its a problem with the turbo

You have Nissan's VG30DE engine in your car. If you go to www.ttzd.com (Twin Turbo Z's of Dallas), you'll find Tech articles for the 300ZX (the non-turbo version is the same engine that you have). One of the articles is the full timing belt service job. I believe it was done on a twin turbo, but for purposes of the timing system, the turbo and non-turbo are the same. It'll give you all the info, pictures, tool lists, and step by step instructions that you could want or need.