My 04 LS with 48K (bought it at 33K in July 08) has always had a random "odor" that occurs only at low speed/stopped while it was warm. Kind of a burning odor, but not oil. I let it go, car has an extended warranty. Recetnly, the car has started vibrating at idle. Not "shaking" but like the whole car is a cell phone on vibrate mode. Only does it at idle, but its been getting more pronounced. I can stop it by keeping my foot on the brake and feathering in some throttle to get the RPMs up over about 900. It also knocks/rattles under load in the upper gears (or its never in 1st long enough for me to notice). Ford dealer called the knock "spark knock", said it wasnt covered under my extended warranty as a "maintainence issue" (note-fidelity warranties are not what they are cracked up to be) and wanted near a grand to replace all COP's and plugs and flush the fuel system. Didnt check on the smell and the vibrating started after that. Had a CEL flash at me once, got it checked as "misfire in #6 in the first 1000 RPMS" (which one is 6?)
I pulled the 3 easy coils and looked for scorch marks, cracks, oil in the wells-nothing. Didnt pull the plugs, might try that. Dont really want to pull the intake unless i have to.
Anythoughts on any of it? related?
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