Ok, There is a loud hissing sound coming from the front of the intake manifold. It is coming from the area where the little bar connects the 2 fuel rails.

I cannont find a leak anywhere. Could this possibly be my Throttle body?

Thanks

 

It's common for the rubber intake elbow to crack after a number of years. You might want to check that first, just unfasten it from the throttle body and look at the bottom side of it.

The bar that holds the two fuel rails together actually has fuel running through it.

You might want to check some of the vacuum connections on both sides of the manifold. There are quite a few in that vicinity.