I have a 89 5.0. Did a smoke test to check for vac leaks. I had smoke coming from the throttle body to intake mating surface. Which I'll fix. A had smoke coming out the #1 injector. I don't think it was from anywhere around there. Has anyone else heard of this? I had a hissing noise while the car was running previously around there. So thunk it's that. Wondering if anyone has seen this before?