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Mine is blocked up top near the valve at the joint with the fancy hose clamp. I used a stainless fender washer. Believe it was 1 inch with a 3/16 inch hole. Been on now for 3000 miles. I do get the Check engine light. But I have piece of mind that that nasty carbon is not choking up my intake.
Last edited by Mark M; 03-24-2014 at 11:45 AM..
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