I have checked connectors and coils also spark plugs
What else can I do
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1999 Ford Expedition Question: Got Codes P0353,P0356 after changing spark plugs I have rechecked everything
Answer #1FREDDY BLUE from Freddy Blue's Local Heroes Auto Repair, May 17, 2013, 10:59Enthusiast
USUALLY THE IGNITION COIL PRIMARY RESISTANCE BREAKING DOWN OR CONNECTION PROBLEMS CAUSE THESE CODES. EXCHANGE THE COILS FROM THE TWO AFFECTED CYLINDERS #3 AND #6 TO TWO OTHER CYLINDERS AND SEE IF THE CODES MOVE WITH THE COILS. THIS WILL CONFIRM COILS ARE FAULTY AND YOU CAN REPLACE THEM. IF THE CODES DON'T CHANGE WITH THE COIL POSITION THEN YOU HAVE A POSIBLE WIRING OR CONNECTOR PROBLEM. CHECK THAT THE TERMINALS INSIDE THE HARNESS SIDE OF THE COIL CONNECTORS DIDN'T GET STRECHED OUT AND LOOSE.
Reply915tommyboy74, May 17, 2013, 11:21Rookie
Thanks for the HELP.....
Answer #2jeff dynamech August 13, 2013, 11:02Rookie
check the flow of feul