Quote:
Originally Posted by SSDan
Have you double checked for any vacuum leaks? I once left the valve on a CC partially open and it created some odd idle and low rpm issues.
Also, these LT1's can have some rough idle manners after a cold start in colder weather.
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I can’t think of any where on the catch can there could be a leak? I’m going to buy an OBD scanner on Amazon and check. Installation of the mishimoto catch can was painless. I can’t imagine it screwing anything up.