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car doctor
car doctor 10/6/2012
2003 Ford Ranger Edge 6Cyl3.0L - Engine
running on 2-3 cylinders, my scan too says "faulty coil pack"
Now, I have replaced the module (twice) new wires, new plugs, compression 150# on all cylinders, replaced fuel injectors on left bank because those were the ones not firing, noid light shows pulse to all injectors, fuel pressure is 65 psi.no more codes stored, just ignition coil pack bad. crank sensor good, MAF sensor new, cam sensor new and re-timed correctly. New PCM, re-mapped. Wires from coil pack show continuity all way to PCM. HELP! Don't know if this engine has a cam sprocket like the 5.0 V8 (aluminum hub with nylon teeth) I have had the plastic teeth slip on the hub before but engine would not do anything there.
4 Answers
  • gearbox
    gearbox 10/6/2012
    what kind of scan tool showing coil pack bad? check the wires at the coil pack for a loose pin. easiest way is to unfold a paper clip shove it in to each pin and see if it falls out if shaken (I'd go with a everyday size one.. sorry don't know the size as I steal them from the shop cashier)
    Also since you have basically gone for broke, next I'd recommend a dealer to insure what is missing as those with an IDS (ford dealer scan tool) get a few more things to help diagnose with. as If I remember ford stop using the plastic gears in the 1990s as I personally haven't had to do a chain job on one yet and I see a few 200k mile plus vehicles using this motor.
    give more info on what you are seeing exactly
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    gearbox
    car doctor 10/7/2012
    Thanks for the reply Gearbox, I am using the snap on MT2500. I have checked ALL the pins and they are all tight, no broken wires from module to PCM. The only thing I have found that is a little different is the coil pack itself (I checked all of the three new ones and compared them to the old one) the resistance across the secondaries is 11.2 K ohms on all of them and the book says 13 to 15 K. The conclusion I have come up with is that the cam sensor and the crank sensor are not in sync.
  • car doctor
    car doctor 10/7/2012
    Gearbox, I am also getting a full 12.6 volts at the module with the ign. on. May have to take the new PCM back to ford and have them re-map it again......don't want to have to take the whole truck to them because I will have to pay an outragious towing bill also if the timing chain was off a little bit, I don't believe I would have such good compression on ALL cylinders and the manifold vaccum is at 16 inches. May just have to "bite the bullet" and take it to the dealership and fork over another grand.
    Reply
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    car doctor
    gearbox 10/13/2012
    Sorry for not responding as usually I do this on my free time on the weekends. anyways remap as you call it won't do nothing ifit's had right info added but besides this is a theft key pats system and needs a locksmith or a dealer level computer to program the keys to the pcm. Where did you get pcm and coil? thats why electrical I go ford unless obsolete as I have been burned by aftermarket esp a national retailer to diyers. cam timing must be set with number one on passenger side
    car doctor
    gearbox 10/13/2012
    limit caught me.. on compression with tool and you have to follow the book as they usually want it installed a certain way. But as I said, this motor I have really seen any timing issues since first generation in like early 1990s. I'd also try ford coil as resistances can wreck havoc...
    car doctor
    car doctor 10/13/2012
    Thanks for reply, has GOT to be a PCM issue, EVERY wire has been checked for continuity from EVERY sensor to PCM and is good, no breaks, no grounds.ALL new components, PCM (autozone), 2nd one. coil pack, wires, MAF, TPS, Cam pos sensor. crank sensor, plugs, ALL new vaccum hoses, KOER codes are P1000 and left bank too rich, right bank too lean, now have 6 new injectors, cranks, & runs idle rough, anbsolutely NO POWER. disconnected exhaust at manifold checking for stopped up cat. converter.
  • gearbox
    gearbox 10/20/2012
    Not always as the cam position sensor if it was installed 180 degrees out can cause the codes you are reporting (Ford had a tsb out on this issue, but references using a ford scan tool to diagnose proper placement) Unless I can't get from Ford, I don't do aftermarket as the rebuilders are many times good, I've seen some bum ones but with codes you are getting, this isn't the case IMO.
    Wish I could do pm to diag lot easier as I said haven't had time to help you in real time as I should.
    Reply
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  • HouseCallAuto
    HouseCallAuto 10/20/2012
    I want you to detail what the car was doing when you first went to work on it? Why was the vehicle brought in to you? I assume it is not your own car, but a client?And if it is your vehicle, what was the fisrt symptom? Did anything you did so far do much of anything or is it for the most part unchanged in the way it is running? also, can you state the code numbers please and not the titles?
    Reply
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    HouseCallAuto
    HouseCallAuto 10/20/2012
    It is sounding like cat clogged on one side.
    HouseCallAuto
    car doctor 10/26/2012
    HouseCallAuto, you win, also thanks for everyones help and advice. The cat was the first thing I check but only did an in field check (loosened the Y pipe and lowered it, didn't take it all the way off) and it still did the samething and that is what sent me on a wild goose chase.All said and done, the cat in the Y pipe was stopped up. Replaced it and its working great. Some lessons are hard to learn........and expensive. :)
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