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...
I have read posts and seen DIY's on using Sea Foam to clean out your engine...
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?