I have a 2002 SE that has 107000miles. The knock sensor is out. The vac needs replaced. My friend, in an effort to be helpful, tore apart my air intake manifold looking for the knock sensor - not found. 2 days later, now my vehicle shudders and makes a thumping noise, as well as it will not start in park. It will start in neutral. Any suggestions on a fix? I desperately need this vehicle to get back and forth to work. Thanks.