I thought I solved my intermittent random misfires from vacuum leaks, but it really is just masked; they are still subtlety there. Now, they are much less, but I can tell the engine is somewhat groggy at those times. I run a OBD reader while normally driving, and the misfires show there. Some I surely would know about w/o the reader. Is there always a certain amount of misfires, even when it was new? 2005 GP GTP