Ever since doing the T56 to 4L80E swap, the truck has difficulty starting when cold. It takes a 2-3 seconds of cranking before it putts a couple times then gets going on its own. It's a weak start.

When it's warm it will fire up almost immediately without hesitation.

My startup airflow tables are all stock. Idle airflow has been modified slightly but I probably need to go back and update it.

Would adding fuel to the initial fuel prime help? Or should I be adding airflow?


Thanks