Cannot get the timing right

[chaos.five.zero]

2004
Frontier
3.3 (VG33E)
160,000 miles

The truck began stalling at an idle. The truck has never stalled since I purchased it new in 2004. The timing belt had about 30K miles on it, and about the same since the last tune-up.

I replaced the Distributor, and I have not been able to get the timing correct. I pulled the front end apart and replaced the timing belt and tensioner....put it back together and it runs at an idle, but backfires through the exhaust when you give it throttle.
The timing marks on the crank are to the left of the pointer with the distributor all the way to the back. After I check the timing, I reconnect the TPS connector (bottom) and it begins idleing rough.

Meanwhile no DTC faults are thrown..Any ideas?

[JB'sTitanXD]

Timing for the 04 should be 10°±2°

[Q451990]

to NICO!

If, by chance, you haven't downloaded the FSM for your truck - it's available at www.nissanservicemanual.com