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Old 03-03-2013, 04:31 PM   #1
JoeGrzesiak
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Angry Horrible misfire

Hi, I am new here and have searched for a solution, but couldn't find much.
A couple days ago I was driving and it started to jerk, like when my coil pack was bad. So I replaced the plugs, wires, fuel treatment stuff, and a fuel filter. I just got a new coil pack and now I've got a check engine light saying misfire cyls 1 and 4. Now it barely wants to run. Once in a while before I shift it runs decent before it runs horrible again.
Thanks


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Old 03-04-2013, 07:03 AM   #2
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Now today it doesn't want to idle.
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Old 03-04-2013, 07:10 AM   #3
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have you checked the pins and wiring at the electrical connector to the coil pack?

Many people have had a problem as you are describing because a pin has backed out, causing half of the primary system to fail.
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Old 03-04-2013, 08:12 AM   #4
JoeGrzesiak
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I just went out to look, what is the best way to check it? and best way to repair? Thanks again
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Old 03-04-2013, 08:18 AM   #5
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Motorcraft part # WPT-517

How to link:
http://www.focusfanatics.com/forum/showthread.php?t=182625
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Old 03-04-2013, 09:08 AM   #6
JoeGrzesiak
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Awesome, thank you guys. I'm gonna grab a pigtail after work. Hopefully that's what's wrong.
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Old 03-04-2013, 09:29 AM   #7
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a leak in your intake manifild can also cause mulitple cyclinder misfire and such
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Old 03-04-2013, 10:25 AM   #8
JoeGrzesiak
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But could that get progressively worse also?
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Old 03-04-2013, 07:15 PM   #9
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When you get a misfire in cylinder 1 and 4 as a pair (or 2 and 3 as a pair) it's usually indicative of an ignition primary circuit problem since the Ford "wasted spark" ignition system fires the plugs in those groupings. Of the three wires comprising the ignition coil connector, one of the two thinner outer wires should show physical damage, chafing, splitting or corrosion. (The thicker middle wire is 12V supply.)

Easiest thing to do is to simply tug on the wires; they usually break or come apart if bad.

If the problem is severe and persistent enough, eventually you'lll throw a DTC code - P0350, P0351 or P0352.
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Old 03-04-2013, 07:26 PM   #10
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Yeah I started to pull the harness apart and when I was moving the harness around, one of the wires fell off. So I'm hoping when I replace that, everything will be ok haha. I was going to post a picture, but I figured you all have seen that before. Also I have no idea how to post pictures. Haha
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