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What is your question?
Several other owners with this problem have fixed it by repairing a faulty wire...wores witch goe from pcm harness to injectors. Can you show me witch wires these are, including color codes and location.
2 Replies
Hello, which engine? 4 cylinder or V6? Secondly, I have been working with these vehicles and the identical Ford Escape's for quite some time and have never heard of what you're saying. If you have a misfire, you need to check ignition coils and plugs, base engine compression, and possibly fuel getting to the cylinders. Start with the basics before looking for a phantom wiring issue.
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My vehicle is the 3.0 liter v6...scheduled to have 6 open recalls corrected this tuesday, one being replacement of the pcm. I replaced valve cover gaskets as oil had leaked into the spark plug passages, saturated the coil boots and grounded those cylinders.Replced coil boots, hi quality plugs-properly gapped, torqued manifold/plenum,replaced vaccum lines in places where worn or collapsed, cleaned injectors, and all electrical connections of engine sensors.Checked for codes, then started checking for continuity...system by system, sensor by sensor, wire by wire, from pcmharness forward.One faulty wire to injector, and several other weak connections to various components...egr,ignition,etc...Idles and runs like a different vehicle. I found the suggestion to check wiring at pcm harness several places when researching possible causes online and would be happy to include several links and my email as this was crucial for my situation. Read many many stories of people fixing endless items incuding pcm and cats along with all six coils only to have problem reoccur in no time. Edmunds, i fix it, and even youtube has info on faulty wiring for this vehicles pcm and show the fix. Hope it helps some of the people who are at their whits end with these issues.
I am having problems getting my 2003 Mazda Tribute repaired. The mechanic has it and says itb is the injector in the 2nd cylinder, but he is having problematics. He doesn't know how to remove the fuel rail
Hi Dave I read all of the above, I have a 2009 Ford Escape 6 cyl with 124,760 miles. Below is what’s been already done. I’m pretty sure by reading alot and going to 4 machinics I’m thinking it’s the wire going from po303 to pcm, how do I fix this. Does it need new pcm or just a harness? Check engine Po0303 Check engine light Misfire cyl 3 Installed 3 coils 6 plugs Check engine light on again Got rejection sticker Change coil to cyl 1 Misfire on cyl 3 again reset Check engine light again Check compression - good Change coil to cyl 6 misfire on cyl 3 Installed Fuel injector Check engine light again Misfired again # 3 10 mm unplug battery COLD 10 min drive 50 miles nonstop Check engine light off long enough to get a sticker Valve spring suggested PCM suggested Check engine light come on intermittently, off a few days comes back on a few day off again on again. Not blinking and car is shaking only when engine light is on. Please help Regina
If you're saying the concern occurs intermittently, then you could have a wiring concern, but talk about unusual! Unless there is other history of an accident or damage, or rodents under the hood. Otherwise, harnesses are typically good indefinitely. The best thing you can do is seek guidance from someone that has a diagnostic tool capable of all the Ford factory testing -- power balance, relative compression, monitoring components. Codes just give you clues on where to look -- they don't tell much about what's failed. If you're going to troubleshoot wiring, you'll need a wiring diagram to explain which wires go where. Then, yes, you would want to circuit test the appropriate wiring; also you could do a "wiggle test" with the vehicle running of the harness to see if performance changes or if you can inspire the check engine light to come on. Good luck!