Might be bad news.. Finally getting the project off the ground. Gotta get smogged, so after tuning everything on the beater it runs just fine. No overheating in tripe digit days, easy starting and good idle. BUT.. it has a death rattle. Accelerating under a load, or in neutral, has a serious knock. Doesn't knock at steady RPM high or low.
Any input on what to check first would be appreciated. Really hoping to band-aid it enough to get smogged.