Why is my RPM going from low to high, once my temperature is perfect?
My Volkswagen Jetta is a 2.5, 5L, it’s over heating it goes from low RPMs to high RPMs and I have everything in check I have done the oil change, changed the spark plugs, changed filters, and a mechanic told me to clean the carburetor with carburetor cleaner and I did put some put i think it was no enough. It’s still doing the same problem and it’s wasting way to much gasoline then the usual now I need some help on tying to find what is it? Help please
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