hey guys!! im new here!!

I bought my car with 80k a few months ago and I just got this first issue!

I notice the rpm bouncing up and down around 600. got the check engine light and hooked up the scanner.

I've seen so many posts about this subject but they mostly talk about the p0174 code present too which mine is not indicating.

i'd changed the oil filter housing gasket two months ago. no leaks so far!

the valve cover gasket leak is my next. im just taking time learning how lol

any info will be really appreciated guys!! thanks!!!