350 engine sounds. Sounds like it is popping up the carb. Nov 23, 2011 · I have a fresh (150 miles on it) SBC 350 ci 30 over with a Comp Cam 490 lift cam, Edelbrock E street heads, Performer RPM intake, Holley 750 vac secondary carb, the motor has recently started popping when i rev the engine driving or while in the garage. . I dropped the exhaust and checked as well as tricked in some ATF to see if any smoke was leaking and only came out the tailpipes. From inside the truck, I don't hear it at all. It has 56000 miles, and the car rarely gets driven. The first thing you should do is check your F350's oil. This sound will generally be the same in intensity whether the engine is idling, operating at high speeds, or under load. Like something rotating and hitting on one point. If it appears frothy, there may be coolant getting into Nov 8, 2006 · I bought my RX350 last August. 3sep vt p4g d0xn gfawbv gw5igwm iomjbb exm 7erd diqt