Hey guys, I recently installed my MSD 6AL2 box and I couldn't help but to notice a LOUD backfire, almost like a shotgun blast in my car mostly only when I downshift to about 3500 or so and ride the gear out while the RPM's go down. The backfire always seems to happen around 2000 RMP.
It's an 89 coupe N/A heads/cam/intake setup, exhaust is LT headers, off road mid pipe and dumps after the mufflers.
Does anyone know what might be causing this?
It's an 89 coupe N/A heads/cam/intake setup, exhaust is LT headers, off road mid pipe and dumps after the mufflers.
Does anyone know what might be causing this?
