Fuel Injector Help Needed

My 91 S10 Blazer Stalls Out On Me... We Found Only One Injector Working, So We Put A New One In.... Okay The New One Worked For 5 Minutes Then Cut Out, Nothing.... So Now I Have The One Working, The Driver Side...
Anyone Have Any Idea What I Should Do??
The Computer Is Only Giving A 12 Code... Over And Over... I Am At A Loss...
Please Help

Have you checked power to your injectors?

The 12 code is not a trouble code, just a hello. The injectors have full time power to them and work from a grounding signal. Check fuses first. Possible low fuel pressure? Can you switch injectors from side to side?

I Have Not Switched Them Yet, Will Try Sunday, I'll Let You Know

Have you checked power to your injectors?
HAVE FOUND THAT THERE ISA POWER TO THEM BOTH, 12 VOLTS AT LEAST, WE ARE GOING TO CHECK FOR THE 5 VOLT , I BELIEVE THATS THE GROUND ?

The 12 code is not a trouble code, just a hello. The injectors have full time power to them and work from a grounding signal. Check fuses first. Possible low fuel pressure? Can you switch injectors from side to side?


HAVE SWITCHED THE WIRING PLUGS FROM ONE SIDE TO THE OTHER, THE INJECTOR ONLY FUNCTIONS OFF THE ONE SET OF WIRE, SO WE KNOW BOTH INJECTORS ARE OK NOW.... STILL ONLY ONE SIDE WORKS.WE KNOW THERE IS 12 VOLTS TO BOTH SIDES , BUT ONLY ONE WORKS... WHERE IS THIS 5 VOLT GROUND FROM?? I HAVE READ THAT THERE IS A 5 VOLT GROUND REQUIRED FOR THEM TO WORK PROPERLY..

ANYBODY HELP

injectors gets ground from ECM check for broken wire from ecm to injector if wire ok then ecm is bad

There is no such thing as a ground with voltage... Grounds don't carry positive current... Your injectors use positive 12v and ground period... As michelq said, if your grounds to the injectors are good, then the problem is with the ECM

Ok, We Are Going In The Right Direction... Thanks, Where Is The Ecm On This Vehicle ?? Do You Think That The Ecm Unit Coiuld Cause Other Issues Too?

ecm located on right side.check wiring first

ecm located on right side.check wiring first
I HAVE NOT BEEN IN THE TRUCK SINCE YOU REPLIED, IS THE ECM INSIDE THE TRUCK UNDER THE DASH, OR ELSEWHERE ?

Under the passenger side dash...

Under the passenger side dash...
SO , AFTER READING MY QUESTIONS, YOU ARE THINK ECM, MY FRIEND AGREES , IN YOUR EXPERIENCE'S IS THE ECM A PROBLEM THAT OCCURS OFTEN IN BLAZERS OF THAT YEAR..?