Just purchased my 91' K5 replaced the exhaust manifold gaskets because had leak. took it out for a drive and noticed it very sluggish and under powered. got home and died, i can hear the fuel pump but am not getting any fuel out of the injectors. What can it be? Fuel pressure regulator?

 

did it run itself out of fuel? i know those pumps in the tanks ususally are one and done once they run out of fuel in the k5.

 

No it has half a tank, and im getting fuel up to the TBI? But the injectors don't spray?

 

Have you tested the fuel pressure? It should be around 10psi. You may need to install an adapter to test the fuel pressure.

 

Tested fuel pressure, reading 11 psi. I went ahead and bought the rebuild kit for the TBI, installed it and now it starts but only one injector is spraying?...There's a blue and red wire on one injector and green and white on the other. The blue and green wires are the ones that supply current to the injectors correct? I have current on the blue wire but not on the green. I even checked from the ECM and voltage comes out from the blue but not the green? I opened up the ECM and found an aftermarket Jet Perfomance Chip in it. Am I gonna need a new ECM?

 

You should have +12V to each of the injectors through the white and red wires. The grounding of the injectors takes place through the ECM on the blue and green wires.

 

Well I checked the red and white wires, and was getting voltage on the red but not the white. I saw where these wires connect to a pink and black wire and checked voltage there, which I had. I proceeded to take off all tape and found that between the injectors and the pink and black wire the injector wires had butt connectors and the white wire had gotten disconnected!! Stripped both ends and soldered the wire. It's running like a champ again!! Thanks for all the help!!!

 

Very nice!! Glad to help!