Had a similar problem with my VN Lexcen 3.6 V6,
Rough Idle, and apparently mediocre performance.
- Replaced plugs
- Replaced Leads
- Replaced crank angle sensor
- Did A/B swap of coils with known good one
- Replaced fuel filter
Solution was to replace the injectors - set cost me $145 off the Internet. Result was quiet idle, better performance all round. It felt like a new car.
The ultimate cause of the problem was that my daughter had run the fuel tank dry and the fuel system had picked up all manner of crud from the dregs in the tank. The fuel filter had failed and the original injectors were almost totally clogged. It was cost effective to replace the injectors rather than have them prefessionally serviced.
Thursday, November 15th, 2012 AT 1:15 PM