I swapped to an L31 intake and wired the injectors parallel like your supposed to do when you are running MPFI on a 7427, I finished it all up today and went to start it and it has spark but no fuel, good pressure but its not flashing a noid light. I also did the mem-cal mod and removed the current sensing resistors for the PnH injectors in the PCM and replaced with jumpers. I also tried with a non-modded PCM and mem-cal and still I coudnt get fuel and when trying to connect to it with TPRT it just sais connection failed after trying for about 30 seconds.

Anyone have any ideas?

Edit- In my eagerness to finish I didnt stop to think, I got it figured out, I have a broken wire somewhere, the acc. wire to the PCM has no power. Hopefully after I get it fixed it will start up. Battery is dead though so I'm gonna give it some time to charge.

 

Note that the injectors are supposed to be wired in parallel. Four injectors in parallel on each driver.

When you removed the current sense resistors did you solder jumpers in their place? Need to do that.

RBob.

 

Sorry I meant parallel, I always get those terms mixed up, and yes, jumpers and in place of the resistors.

Its running now, I'll attach some pictures in a minute.

 

Is that a Vortec intake? I just bought a truck with the Vortec engine in it, don't know much about it yet though.