I have a 2002 Taurus SES with the DOHC motor and 106,000 miles. Whenat idle, in drive, the motor misses or tumbles. It is not a constant miss like a dead cylinder. It runs smooth at cruising speed. I have replaced the plugs with double platinum and did all six, replaced the fuel filter, checked the plug wires with an ohm meter and they were good. The plugs all had good color but the platinum electrode showed typical signs of wearing out. The motor still missed after the plug change. There are no trouble codes. Could the coil be failing? Yesterday the radio turned itself on twice on the ride home by itself? I don't know if this is related or just a coincidence. Any ideas? Thanks, Chris
Hello and good day to you:
I would think it could be your MAS (Mass Airflow Sensor) or a TPS (Throttle Positioning Sensor)...Have you gotten a CEL (Check Engine Light) Yet???
As far as this: "Yesterday the radio turned itself on twice on the ride home by itself? I don't know if this is related or just a coincidence. Any ideas?" I Believe your Car is Possessed, and you have a Ghost living in your Car...lol....
No sorry just a joke....You may have a Bad Control/Volume Switch (****) and it is causing it to come on...does this happen when you go over a bump??
One more thing...You may have a Bad Plug Wire, or a Bad Coil Pack on one of the Cylinders.
Please advise further.