It is steady at 12lbs. I bought some "104+" octane booster and poured it in but I have only driven a mile after I put it in and only 5 miles since I filled it.
I also did a visual inspection and listened for leaks and saw and heard nothing. The car has 49k on it and all the hoses and clamps under the hood look like new.
Is there a way to determine if it is the DV valve myself?
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