06 Titan cranks but no start

[Scolabird]

Gonna rant here as a desperate non mechanic newbie and pray for the best folks

06 titan v8 145k 4x4

Bought truck at 120k tons of power and within a week of having its fluids drain and filled and a 3 hour trip hauling a 8k RV (with stops half way) it developed a bad miss AND BUCKING WITH CHECK ENGINE FLASHING.
FAST forward to 4 years later and im still driving said truck cuz I'm broke and it pulls my lawn mower trailer daily for work.


It had always cranked on a dime but smoked a tiny bit out exhaust at startup (i assumed valve.seals)
It would stumble hard and buck at certain points of acceleration but if u throttled down it would actually power thru thr miss/stumbling and smooth out and accelerate


I borrowed a camera last year and deemed it had a badly burnt valve on one cylinder and did compression check on all cyls. The one with burnt valve was low at only 10 psi the others were all between 125 and 135psi. BEEN DRIVING 5 DAYS A WEEK SINCE no issues pulls around 4k lbs everywhere I go.


Soooo. I cranked it and drove half hour Friday last week no issue. Went to crank it today and it started first key bump and idled 1 minute until i put her in gear and lug lug lug chug DEAD. NO CLANKS, NO KNOCKS,NO TAPPING,NO KAPOW,NO BOOM NO POPS. SO I TRIED ALL DAY FIDDLING AND FIGHTING WITH IT AND NEVER CRANKED AGAIN.

Removed all plugs they all smelled of gas (after cranking but no ignition) so i assume i have fuel... i can also hear the fuel pump whine when i turn key.


Plugs each had black carbon build up on them (only 2 years old plugs).

Checked maf looked spotless, cleaned both pcv.


It cranks but no start and then occasionally has a slight ignition sound but it never takes off just a stumble and bluh

What else do i check folks? I'm an hour to any nearest store.

Its been in 60s and 70s temperature lately but the 2 days its sat over weekend it dropped into 30s° i was praying it was some type of sensor failure that richens or.leans fuel injection based on COLD or hot weather??? Is there a such thing?

Could it just jumped time? If so i assume there must be a worn or broke. T chain or tensioners????

Any help gr8ly appreciated, this is a hail mary effort cause i have to get this thing drivable for work.

Thx

[Niti QX4]

FAST - Fuel, Air, Spark, Timing. Pull the air box and give it a squirt of starter fluid. See if it runs. Got to narrow this down.