Truck has rough idle for about three weeks. Not bad at first but now its bad. Check engine light came on about two weeks into it. Code said misfire on #7 & crankshaft reads rough run in first thousand RPMs. So I changed the 7 coil. Still rough & light came on again so I changed plugs, fuelfilter, still the same. Checked for vacuum leak with carb cleaner on the intake manifold. No change but cant get under manifold, so I changed the intake gaskets anyway. No change. I took it to Ford dealer today they said no vacuum leak they think its a bad valve spring or valve on #7. I read on one of the other posts that it could be a crankshaft position sensor (CKP). I need some help please.
Wednesday, February 8th, 2012 AT 12:47 AM