taco will not run please help

hi ok everybody first i will tell you what all i have replaced in the past month:
spark plugs and wires from the factory, mobile1 high mile full syn. oil with factory oil filter, PCV valve, front o2 sensor, fuel pump, fuel filter, ran seafoam through the vac. line

a few days ago the truck ran hot and was running bad so i seen that it was my alternater belt pretty much had no teeth/groves anymore and figured that was why the truck overheated cause the water pump wasnt being able to spin right so i fixed that and it fixed the overheating but truck was running like crap then two days after that truck broke down so now i have tried another fuel pump- no results, i have swapped the fuel rail and injectors from my other truck but still no results. i have good compression 160 psi on each cylinder i have cheaked for spark with a screw driver sticking out of the end of wire but had good spark. all fusses are good. oil still looks great and coolent looks great.

ok so here is what the truck is doing after sitting for a long time truck will start and run very bad and die when put into gear. then it wont start back up and it just soakes down the spark plugs and the crazy part is i can unplug the MAF sensor and the truck will crank back up and idle perfect and rev up perfect but
will spit and sputter if try to drive it over 2000 RPM (still while having MAF unplugged) and then as soon as try to plug MAF back in truck will instantly die. WTF


i have cleaned the MAF- no result and i have checked with starter fluid many times and cant find any vacume leaks. there are five wires that go to the MAF harness and 4 out of the 5 ohm out with the ground and the one that doesnt is the gray with red strip wire.
thanks for any help i am about to go crazy here
also the truck is a 98 2.4L auto
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also could it have jumped timing from the belt not grabbing the pulley?

 

yeah i thought that was not very likley to happen to a chain also but hey i just been trying to think of any possible thing it could be. on the codes dont have any as of now cause i cleared them and can only get it to run with the MAF unplugged so of course then it popped up the MAF malfuntion codes and a TPS malfuntion code but when i had it running the night before last with the MAF plugged in it only had the system bank 1 running too lean codes which has been popping up the whole time i have ever had this truck (over a year)

 

yes i have looked at plugs there new but you know from getting soaked from trying to crank so i have cleaned them best i could and gonna get new ones o nce figure this out the overheating was from the water pump not being able to spin efficiently but now it dont overheat

 

could the Engine coolant temp. sensor cause it to run bad the other day i remember a code that popped up and said Engine coolant temp. sensor malfunction

 

im on my way to my shop now and i will try a new EFI main relay from my other truck its the green one under the dash right?

 

ok thanks i will let you know as soon as i get there

 

im gonna stop and get a engine coolant temp. sensor on the way also

 

Hey good news the old engine temperature sensor was melted new one in and she is singing lol thanks so much for the replies

 

Good job.