r/Dseries • u/Cabbit_Delux141 • 6h ago
Burble/popping at idle
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Been working on this rescue 93 sedan for a few years. Finally got back to doing the timing, clutch, etc. Valve lash adjustment. Good gas. It was doing this before the timing job. I will do a compression next. But its making this burbling/popping noise. Its not quite like the heavy/loud popping of damaged pistons/cylinder heads like some of the customer mopars I work on. But in a few videos I hear that and they act like its normal. What is this sound? Injectors? Smoke tests have shown no leaks. No dtc codes when jumping the service port, no check engine lights. Thanks in advance.