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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
At this point it would be wise to take it to an auto parts stores like Auto Zone, that offer a free computer read out to help you diagnose it.
If your idle fluctuates from high to low you have a vacuum leak after the map sensor .check the vacuum lines for leaks and check the gaskets on the intake manifold . This car is not equiped with a carburetor , its fuel injected and as such you need to clean the throttle body and the air passages involved with the TB. This video will help
