I've noticed a slight surging at highway (65-80 mph) speeds especially at lower gas tank levels. This condition seems the same whether the valve is turned to on or reserve. The hidden filter is suspect as well as the petcock screens. I have the stock petcock and purchased a small disposable inline filter to put in before the hidden filter. On the advice of our resident technical guru from a past post, I'll clean and replace the hidden filter instead of throwing it away. If anyone has had this condition of minor surging (like a strong headwind gust when there isn't one), I'd appreciate your sharing the cure(s). I'm going to clean the screens and install the extra filter this morning anyway as it can't hurt and doesn't cost much. Thanks, Steve
