I need the factory specs for timing marks for a v6 nissan frontier after replacing the timing belt

no VIN posted or country and means ,impossible to know this.:
he Nissan Frontier is a nameplate used on two different pickup truck models by Nissan:

• Nissan Frontier (international), an alternative nameplate for the NP300/Navara on some markets ,SOLD UNDER 15 NAMES WORLD WIDE;
• Nissan Frontier (North America), a rebadged NP300/Navara from 1997 to 2021, then became a separate model since 2021
• Sold as D22??????canada or USA?

VG30 V6???
VG33 V6???
the Nissan here has a cam timing belt, if allowed to slip at 60 to 100kmiles the engine is wrecked, valves in the cyl. head bend!

so do you ignore this belt>? if yes it will get worse. $$$$$$$$$$$$
do not disconnect the map, and leave it like this, ever.
forget evap code until engine is fully serviced.
all Nissan's are interference engine,<< belt never IGNORE
1: check the cam belts for fray,cracked or skipped time.
2: new spark plugs (before o2, fuel cannot burn with bad spark.)
3: check fuel pressure to spec, FPR can be bad. and low pressure.
4: pulling map can kinda hid a bad FPR, if pressure is low.
5: new distributor timed wrong. as most noobs do,
6: clogged 1/2way injectors.

Yes.

You really need to invest ($20 or so) in a repair manual for your Frontier. Go to your local parts store and find a Haynes, Chilton, or other repair manual. It will give you all this information, plus tips on how to do any repair quickly and with the right tools.

If it's the timing belt you may have it a tooth or two out. Take the cover off and turn the engine till the timing marks are on and see if they are all on their marks. Sounds like you have it out of timing, If what you changed it the serpentine belt .... that's a different story. You may just have something unplugged you never put back.

Nissan markets its D22 and D40 pickup trucks in North America as the Frontier. A six-cylinder 3.3-liter engine with a double overhead camshaft is standard for the D22 models. The timing belt for this engine keeps the camshafts synchronized with the camshaft, enabling the engine to run smoothly. The timing belt has a limited lifetime, and typically requires replacement after 60,000 miles.----------------------------------------------------------------------------------------------
Original Launch CResetter

does it shift into reverse????

If your timing belt breaks some of the valves will stay open and the pistons will come up and either break the valve or could put a hole in a piston. This is very costly. The rattle could be the belt tensioner

Change the belt

you need to remove the whole front end of the engine apart. the pump is behind the timing belt. may as well replace that and the crank and cam seals while you in there.

Some say 80000,but I would say 60000,