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sea foam

  1. General E46 Forum
    Okay so for the past two months I've been struggling to find what is causing my secondary air pump codes. I have replaced the vacuum line that runs from the check valve to the plastic line. That did nothing. I have tried the sea foam trick where you pour sea foam into the hose off the secondary...
  2. General E46 Forum
    I have read posts and seen DIY's on using Sea Foam to clean out your engine... and wonder: Is this a recomended/usefull practice? How many do this? have done/tried this? Does it actually work? What are the benifits? Is it harmless? Thanks