2004 lincoln nav...shaking..trying to cut off...mech said 3 plugs and wires need oto be changed...can I do this or should I do A complete tune up?
There haven't been Tune-Ups,in the last 30 years,on vehicles that are all electronic
You have COP, Coil-On-Plug Ignition System,no plug wires
Spark plugs and Air Filter and other electronic cleaning, is called preventative maintainance,and as I said, that way for decades.
If you have Codes PO-301 thru PO-308,you may have a bad coil or two. I doubt you have three bad.
Their $59.00 at the auto parts store. Install them yourself
The only tuning that is done,is by the PCM (computer),not a repair shop mechanic
Also,scan the Throttle Position Sensor,they fail. You can get that at the store also,and don't need a dealer to sell you the entire throttle body for $700.00.
Clean the MAF Sensor ,with CRC MAF Cleaner
Expect the EGR Valve to fail.
Change your trans fluid, flush your power steering fluid and brake fluid every couple years.
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