My car is lacking power, starting recently but it happened pretty gradually. rough idle, bogging a bit, and my injectors may be clogged(or some gas related clog), i changed the fuel filter today idle cleared a bit, still lacking power.. would it be bad to use too often in the intake? i used about 1/6th of the can again in between the first and second application. car ran alot better instantly after first application and i was advised to use it again. can too much be bad?