ok, I noticed this noise would start about 1500 rpm and as the rpm fell the high pitched tone faded. I could hold it at 1500 rpm and the tone would hold steady but not every time. Pulled out and got on it hard and it shut down. Pulled over turned key off and it started back up. Down this to me a couple times as I got on it hard. Is this from maybe the CSPS I just put in last week?