Hey! Have a 1994 Sonoma that ran but surged all the time and when i wanted to accelerate it wouldnt go like it should. One day I was low on fuel an it died on me so i beat on the fuel tank an it fired up. So I thought it was a fuel pump. Put a new sending unit an all in it wouldnt start. Put the old everything back in an it fired right up. Took new sending unit back thought I had a deffect. Got the same thing still wont start pump does kick on. So i decided to put old one back on wont even start. Spray ether in intake fires up til it burns that off please help????