[gtx2000]

How is the gas going backwards? I noticed this when i was installing MY NEW ford dealer INJECTORS i thought this would solve my problem but it hasn't. But when replacing the injectors and i had the upper intake off there was gas in the runners and the gasket that seals the 2 was wet. I got a mysterious miss that i cant figure out and need help to figure this thanks

 

[Twilight]

Have you checked your timing? It's a long shot but a bit of intake and exhaust valve overlap might draw a bit of gas into your intake runners.

 

[gtx2000]

I got it set at 10 degrees TDC but i should check my computed timing i heard it should be at 30 TDC