WarpDrive42
New member
- Joined
- Mar 7, 2025
- Messages
- 2
This one's got me scratching my head. 2012 Silverado 4.8 flex, cylinder 8 misfire started right after seafoaming the intake. No codes, no vacuum leaks, compression and leak-down tests check out. Swapped injectors, coils, plugs, wires, O2 sensor. Misfire stayed. Fuel pressure is fine, even replaced the computer. Tore the engine down, lifters, valves, pistons, cam, everything looks good. Still misfiring on 8. What the hell am I missing?
