Hello I'm Neal and I am here to help resolve your issue. If I cannot help I will opt out and refer your question to another expert.
The first thing to do is a tune up. If there is no check engine light then that is by far the most likely problem and is the first thing you need to rule out. Just a set of plugs to start and see if it helps. Let me know what you find and I will continue to assist as needed.
OK...I understand, but what about the rpm gauge reading what it is? Is this a sign of idling too high? Because of clogged fuel injectors?