my car is having the same problem.i have a fully rebuilt lsvtec in it.its not throwing any codes and has fuel and spark.the car has sat a cpl years with about 3 gallons in it.instead of draining the tank i put 5 gallons on 91 in with octane booster.it tried to fire only about 3 times yesterday.and nothing at all now.im at an end on why its not starting.any help would be awesome