Did the 0411 swap on my L29 using an 02 Express van 5.7L ECM. It starts but won't run. Runs smooth on all 8 cylinders for a few seconds and then dies. Will restart but the same thing, a few seconds and dies. It seems that it is not getting fuel after the initial start. The ECM has not had anything changed or disabled, installed just as it was when removed from the van. It did have an EGR code, not sure if that was from the van or my car. The scanner was also showing a fuel tank pressure reading of 647.98 H2O
My questions are:
What needs to be disabled or changed to get it running so it can be tuned.
I want to order an HP tuner today, which one would be best to use for this engine?
Thanks, Philip