Engine and auto trans died while driving it two days ago and it will not restart

Have heck the spark multiple times and even made sure it was bluish whit and not a dull red like another person told me to check. How would valve or ignition timing just magically be off and how do I even check that im quite capable of doing things but I just got this truck a month ago and havent bought a haynes for it yet but plan to tommorow.

Oh and I marked the plug cables when I tested them so they are rite back where they were just thought I mention that

Well I didnt have a timing thin so I took all four plugs out and grounded them and watched them spark in order so its not that we3nt ahead and popped the bed up and took the old pump out now im just waten for a new one from online cuz autozone wants way 2much almost 300 bucks and online its like 60 so im waitn for the next day mail now, I sure hope its not the damn regulator tho im like 95% sure its the pump but there that 5% thats telln me it might be the fp regulator. Can fpr cause that low presure and imediate loss of presure after cranking like literely a second after cranking that presure is gone from 21 or so to zero.

Just tried that cuz im thinking it mite be the damn regulator now problem is I cant pinch of the return fuel line cuz they are hard plastic and or aluminum so I stuck a golf tee in and taped the shit out of it but still the gas gets through sum but what im wondering is if the fuel presure regulator would cause whats happening basically I turn the key fuel goes to the rail reads only 21-27 psi because it is instantaneusly getting sent back to the tank via the return line shouldnt the fpregltr be holding that gas there for the next tim I try to start I if it doesnt start not sending it back to the tank? An experts opinion on this would be greatly apprieciated ty

Ok I got the fuel line un hooked from the fpr but its dark and my garage isnt that well lite and I cant tell what type of tool I need to unbolt the fpg it feels like maybe a torex but not sure tried stickn a few sockets under it and nun of them fit does anyone no what tool it takes to undo it I dont waqnt to take the darn intake manifold off! Ohh and it seemed dry where I unhooked the line but cant quite get the vacume line off until I detach from fuel rail so need to what tool it takes ty every oe this site has helped me aalot and hey if it turns out to be the regulator and not the pump well its a good time now while the beds up to power wash/ maybe sand blast or wire brush and re under coat the rusty ass damn thing its 2000 and all the under coating is basically gone wtf?

Ok got the vacum line off the fpr it is leaking into the vacum a lil couldnt get it off sinse some of my better tools(snap ring pliers) are in a big matco box in a pawn shop at the momentbut thats another storie for another day the problem I have now is im so confused on what it is because early this morning when I had my friend crank the engine while I poured in some gas it did fire maybe just a coule times but tonight I tried it again and nuthen but a fire ball no turn over at all!And from what ive seen online this could be a damn timing chain that has slack or has slipped enough to f up the timing how do I check the timing I dont want to open it up to get to the timing chain if I can help it haynes says 2.2 hrs but thats with all the rite tools and since my puller fan wrench set torex set etc is at dowtown pawn till pay day (friday) I have only basic tools or what I can borrow and payday is gunna b small cuz I cant get to the jobs im sposed to be doing cuz my damn brand new to me 2000 dollar fucking truck wont run! Grrr am just so done head ache if I lifted that rusty ass bed for nuthen ima be pissed

Ok changed fuel presure regulator not that and the pump gets here tommorow but I know it wont do me anygood cuz I boorrowed a compresion tester and I have zero compresion on cylinders2 and 3 didnt bother to check the other two yet but if I had to gues proly nun there either so what does this mean can a slipped timming chain cause no compresion cuz if it can I gues thats next cuz after that its tear down time rite? Oh I know the chain isnt broke cuz the pistons are moving in there so can a slipped a few teeth timing chain cause the no compression or is somthing else more likely like a head gasket or somthing?

Ok first thing in the morning I will what should I be listening for exactly tho air escaping from either the intake or exhaust valve? But you dont think zero compresion would be caused by the timing chain just skipping? Cuz I know its not broke cuz the pistons are moving in there.

Ok compresion mesurments were as follows #4 35psi #3 0psi #2 0psi #1 30psi opened up the timing chain cover to find it snapped and the tensioner shreded so pretty ssure that was the culprat. Still cant explain the low fuel presure but if its still low once im done with the timing chain them il change the pump since I already got it in the mail. Thanks for all the help everyone if theres anything else do do about all this il post it ty again --jake--

Ok timing chain back on and most stuff back on have to wait to tommorow to finish cuz I remember from all the testn I did earlier that the #3 injector is sprayn way to much cuz it was filln the intake manifold port #3 from only crankn it over a few times so im hit the junk yard tommorrow and pick one up unless one of the big boxes stores hasem cheap then its back on with that and done. Oh I noticed when I pulled the valve cover it was pretty nasty in there I cleaned it out with a vacum as I geently scraped neasty cruty oil stuf off the guy who had it b4 me must have never changed the damn oil at all ggrrrr any suggestions on how to clean it better without having to pull the head?

Oh that injector might explain that slightly low fuel presure(27-32)? I have the pump now anyways so if it still test low ima change it while the beds up figure mite as well.