Question about 2001 Ford Focus

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Engine management light has stayed on after being repaired. Replaced the coil pack but light still on.

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Reset main maintence, under dash on drivers side

Posted on Jun 20, 2009

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Fix misfire engine


I had this problem quite a bit as I repair vehicles daily ...you will need to do a pressure test on your fuel injection system ,,also try this first ,,change that fuel filter ..let me know later how this helps

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05 Ford Escape, coils #3 & #4 not firing. We've replaced the battery, spark plugs, alternator, coil packs, & pcm. Had pcm reflashed. Garage said it had to be coil packs, but just replaced coil packs 3


Check engine light on ? Code's ? What engine ? 2.3 l 4cylinder or 3.ol v-6 This vehicle has coil on plug ignition system , not coil packs ! a coil per cylinder . If new coils an still has no spark , has no B+ voltage to the coil or the PCM isn't controlling them . Without testing i'd only be guessing as to the problem .If the repair shop you had it to can only say it had to be the coils , I'd find another shop to take it to !
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Had coil pack,wires,spark plugs put on because engine like was on saying coil pack problem replaced and still saying coil pack problem? what to do next?


Make sure you cleared off the Error Code after you repaired it. An Error code will stay for 25-35 Startups before it cycles out of the system.

Check your power wire to the coil and see if is at least 12 Volts. Other possible problems for the coil would be getting reliable firing sequences from the Crank and Cam sensors.

I hope my solution is helpful.

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I currently have a mazda rx8 231 2004. The engine management light came on and was told that the cat converter was gone due to misfiring spark plugs x 2 leading and x 2 trailing. these were all replaced...


just be careful i almost set my rx on fire i was told to get a tow to start it all that happened was the unused fuel was pumped it the cat and the whole lot was glowing orange when i stoped the car. the fault was a coil pack it cost me loads to get repaired

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it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps

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The scan tool that they used at autozone should be able to erase them and tell you whether they are existing codes or just stored. Hope this helps.

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