Therealmike
Newbie
So I have 1997 Chevy Silverado k1500 5.7L it use to run 35 psi idle and 45 when driving after I changed the oil to 10w30 and new oil filter all of a sudden it runs at 70psi and when accelerating it goes to 75 psi is this safe?
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You mean downstream?If it stays 70psi at a hot idle, I'd suspect something is causing a blockage upstream from the pump.