LS400 Basics, crank no start condition. Do your basic checks of air, fuel, fire, timing marks

always check your basics.... check for spark air and fuel. when checking the air intake make sure there's no nest or anything restricting the airflow which is usually not the case but not to say that there would be if it's been sitting. when checking your spark on the LS400, all you have to do is pull the wires off of the distributor caps while the car is running to see if you have spark going to each wire. remember, the center wire is your coil wire which you really do not need to pull that will kill the cylinders on top of the distributor you have five wires going to the cap you just need to pull two to the left and two to the right of the center wire on the cap to see if each cylinder or wires are getting fire while turning over or running. if you have fire on both distributor caps and all the wires you have fire. when checking for fuel supply you just need to see that there is fuel going through the line upon starting and running. yes, there are proper fuel pressure testers but first you just need to see that you have fuel for the quick check. if you have fuel and you have spark and you have good air flow no restrictions, pull off your distributor caps and rotors and check your alignment of all your timing marks. Put the crank is zero, make sure cylinder number one is at top dead center, and check your cams for timing marks. my symptoms were it may start up after 40 times it may not. then, when it did run it ran like crap. it ran like it was out of time and if you get up to a 1,000-1100 rpm's, would die. right after it would die it would do the same stuff again and would not want to start. you kind of have to think like the engineers that designed it and think that is this an interference motor and how can we prevent the motor from catastrophic failure meaning if the timing belt or marks are not lined up the Piston could slap the valves if out of time so installing a program if your timing is so far out of sync killing the motor from not running would be a solution. my case was the bank to or passenger side Bank cam jumped 3 teeth. I started thinking of why it would fail or jump three teeth in the first place. it could have been during installation incorrect off a tooth, could be the tensioner failed due to not being installed or installed incorrectly, could be the adjuster was not replaced or installed properly, or the timing belt stretched through Time, or subpar products were installed or installed incorrectly all together. I was able to move the cam on that one side by removing the belt just on that one side and taking the adjuster down to give me the room that I needed and rotated the passenger side cam 2 teeth, thought I moved it three forward, by the way is a pain in the butt to do I just wanted to verify if it was the timing and it ran wonderful but not perfect due to still being off one tooth.... that was good enough for me to prove that it was the timing issue and that I need to buy an entire kit while I'm in there, including the adjuster, tensioner, water pump, pulleys, and anything that can cause that belt to jump.