I have a 95 Ranger 4.0 2wd XLT auto. I had one injector running rich so I decided to change all 6. Bought a set of Bosch upgraded 4 hole stock style injectors. I installed them and upper intake manifold gaskets. When i started it, it ran rough, smoking, missing popping out exhaust, dies when at idle, its not even driveable!! Changed spark plugs and no help. fuel pressure is 34psi at idle. The old injectors seems like brand new compared to these i bought. any suggestions or ideas?

 

It is my understanding the fuel pressure needes to be above 50 psi.