Quote:

---

1050 dom,7al3,crank trigg. all i did was build a new short block and put everything back together,now i have to hold the trottle wide open for it to srart and it back fires through the ex.ive benn through the carb,timing ,wires a few times ,WHAT AM I MISSING(no pun intended)

---

The basics, valve lash set correctly, firing order with verification of every spark plug wire on the correct cyliner, distributor cap not cracked and so on. I did have one new street Hemi motor that was backfiring on the dyno due to the jetting I changed on a new set of carbs before running them on any motor, put the primary jetting back to stock from the manufacturer and the back firing stop Check the carb jets to make sure there is no trash in the jets plugging them up Same thing on the bleeds IHTHs