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2004 Mercury Sable ENGINE RUNS ROUGH

Tiny
SSJRSMITH1
  • MEMBER
  • 2004 MERCURY SABLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
WAS TOLD CYCLINDER 2 MISSING, REPLACED IGNITION COIL, SPARK PLUGS & WIRES. REPLACED FUEL INJECTORS FOR CYCLINDER 1, 2, &3. RE-SCANNED. NOW SHOWS CODE PO300, PO302, PO306, &PO316. PLEASE HELP DOWN TO MY LAST END.
Friday, April 9th, 2010 AT 6:29 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
HAve you checked the fuel pump pressure? Also, I'm sure you realize the codes, random misfire, cyl 2. However, regarding the po316, I have found cases of the coil being bad and causing the rough idle, and a bad connection on the B+ wire at the coil. Check that and let me know what you find. Also, you may need to do a compression test to determine if there is a burnt valve.

Let me know what you find.
Joe
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Saturday, April 10th, 2010 AT 11:50 PM

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