This motor has about 20,000 on it. Runs great, no oil usage. Cold pressure at start up 80..Warm up runs about 35 at 60 mph. Warm idle at about 12..( this is what scares me) We run around town alot and have low pressure. What can an inexperienced motor guy do to try to bring up the pressure? I have read about the spring/plunger , but not sure where to start. I am using Napa gold filters. I have done intakes, water pumps , but not an experienced mechanic. I think the mid plate might help too. Can some one point me in the right direction to try these. I need some specifics. Thanks