If you need a gauge you can rent one for free from the auto part store.
Please run some tests and get back to us we are interested to see what it is.
Cheers, Ken
Jul 5, 2017 at 1:52 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.