When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Do you hear a rattling sound? Most likely it's the crankshaft position sensor or the reluctor ring. If you don't hear any rattling, then the teeth on the reluctor ring are damaged or the CPS is on its way out.