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Re: Help me pin point this rought idle...!
Listen for hissing noises while the engine is running. I've found several vacuum leaks using that time tested method. Don't let you long hair (or your clothes) fall into any moving parts.
One of the leaks I found was a split rubber fitting on the PCV breather pipe. The rubber was extreemly soft and gummy, but it was also making noise. Another one that I found was due to a plastic vacuum line rubbing against a metal AC pipe, back along the firewall. I just let my ears do the looking.
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