1987 4runner. 22rte. auto tranny.I finished a head gaskest and timing chain this week end. motor pops right off. sounds great for the 2seconds it runns, then dies. as soon as it dies, i turn the key and it starts right up. runns for 2-3 seconds and dies. if i give it a little gas, it seems to kill the engine or flood it. anyone have any ideas??