Hi, if I jump in my truck and go right away, before it gets into open loop, which isnt very long because i have a hego. Anyways, when in closed loop i have no drivability problems, but if its in open and i get the rpms up there, around 2 or more, it will do some MASSIVE backfires, like, sounds like somone is smaked my flowmasters with a hammer. Is it just running that rich, or is it more serious like the timing way off. Its on a tbichips chip, on a 355 with a cam.

Thanks!


Edit, btw my timing is set right so dont ask, jsut wondering if the base timing on the chip or somthing is why.