Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - DTC P0351 - Ignition Coil "A". At the end of my rope.
View Single Post
Old 03-26-2007, 09:51 PM   #2
Focus Addict
Join Date: Feb 2007
Fan#: 43791
Location: Vancouver, B.C., Canada
What I Drive: 2016 SE Hatch 5 sp., Tectonic

Posts: 872
Points 644, Level 12
Points: 644, Level: 12 Points: 644, Level: 12 Points: 644, Level: 12
Level Up 88% Completed
Level up: 88% Level up: 88% Level up: 88%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 28 Grumpy Great Standing Member
Buy-Sell-Trade Rating: (0)
As no old forum regulars have jumped in here, and as I'm a new Duratec guy, my assistance is going to be limited, and some of my comments may appear obvious, but...... the problem appears to be a loss of the "trigger" (the coil driver circuit) to the one coil. It also seems to be a "heat soaking" thing going on here and it's interesting that "cycling" the IGN. affects this issue. Do you know if the power transistors are incorporated in each coil or are they in the PCM? Is there a relay involved? You don't appear to have accomplished the Check Functionality of the associated Coil Driver circuit, going by your "not done" note. If that's true, then that's where you have to go I believe. I hate to suggest it, but could the root cause be the PCM?
Grumpy is offline  
    Reply With Quote