My car lately has a rough idle and I want to try to smooth it out. The car has 34k miles. I have already changed the plugs to the NKG TR6 (copper) #4177 plugs. All of the plugs that I pulled out looked ok with no sings excess ware (oil or gas). In the intake tube there was a small amount of oil, so I'm going to get a one way check valve and a new pvc plug and fab up an oil catch can. So where should I start.
Thanks
Darren
Thanks
Darren