Chaz
Full Access Member
- Joined
- Oct 12, 2012
- Posts
- 192
- Reaction score
- 13
- Location
- USA
- First Name
- Chaz
- Truck Year
- 1980
- Truck Model
- V1500 Suburban
- Engine Size
- 350 tbi/th400/np241c
Yeah the knock has always been there but it was worse when the timing was advanced,,,,I couldnt get it to knock today but ill know for sure if its gone after i drive it for a while,,,,i thought it could be carbon build up maybe cuz of the gear ratio its always revving higher that it was intended,,,i dont know if higher rpms would cause more carbon or less build up though,,,,i did try diff gas for a while including higher octane but there was no change,,,it would knock with super in it as well,,,,