1990 jetta won't start

I had just replaced the head gasket on my 90 jetta (1.8 l). everything was hooked up and when I turned it over the car started right away, it idled fine but had a heavy smell of fuel, when I went to give it some gas the engine bogged down and died, now it will turn over but won't start. I have spark and fuel. ???Any help would be greatly appreciated.

check the fuses and the wirings under the hood and lost grounds

check the fuses and the wirings under the hood and lost grounds

I have spark and fuel delivery, the problem seems that I am getting too much fuel as the smell of gas is there when turning the engine over, it will after turning over for a while start but then stall right away. the timing was'nt touched so I figure that is correct still.

I don't see how you could remove the cylinder head to replace the gasket without removing the timing belt. The tensioner pully may be loose and the belt could have slipped a couple notches. Another possibility is that the cam shaft timing is off by 180 degrees.