• 4 CYL
  • 4WD
  • 134,423 MILES
1999 honda, passport misfire cylinder #6, code P306
can I repair myself? Without to much difficulty
Do you
have the same problem?
Thursday, July 7th, 2011 AT 10:45 PM

1 Reply

Probably! That seems to be the #1 fault code! I've had it a couple of times, read about it in a ton of articles and blogs, it's usually the "example" they use when talking about OBD2 scanners, and is even the code that was on the scanner on the packaging on both of the last two OBD2 scanners I've purchased! But before you do anything, you should buy or borrow an OBD2 (OBDII) scanner and reset the fault code and see if it comes back. On my own 1997 Honda Passport, it was the cylinder 6 coil pack both times I got the code. Rather than having a single coil and distributor, there is a coil pack on each individual cylinder. I am an amateur mechanic, at best, and may get trounced by the more professional mechanics, but rather than buy a brand new pack at over a $100 ea, I went to a local "Pick-a-part" type junk yard and paid $7.50. There are 2 bolts on top of the coil pack (located at the top of each cylinder) and a little snap on type connector for the fuel injector (make sure you don't break it, taking it apart - they tend to "stick"). I might be way off on my thinking, but since the coil packs are all interchangeable and the #6 cylinder seems to be the "trouble" one, I usually get one from a different cylinder (off of the junkyard vehicle). It takes about 10 mins to replace. Of course, there's no guarantee that your misfire is the same thing, but that's been my experience. And if you don't have a "Pick-a-part" junk yard anywhere close, you might look on ebay or amazon. Or another auction type website. Before you go buy one, you should probably take your old one off and look at it and the spark plug. The spark plugs are a little tricky to get to, since they're so deep, and you might need a few short extensions and a universal joint type thingie. Also, from my experience, you want to make sure your spark plug socket has the little rubber thing inside of it, to grab onto (and hold onto) the spark plug once you have it loose, otherwise you won't be able to bring it up and out of the well. If you have another spark plug socket that DOESN'T have a rubber thing in it, use that one to put the spark plug back in because it's awfully difficult to get the socket and extensions back out, once you have the sparkplug tightened. And my biggest piece of advice. Until you fix the issue, if you are still driving (or even occasionally starting) this car, you should unplug that little connector for your fuel injector for that cylinder. I didn't and it burned out the catalytic converter on that side (My passport has 2, your's probably does too). What I did, to verify that the coil pack was the culprit, was to switch out the one from the #6 cylinder with another one and checked my OBD2 error codes to see if the code identified the new cylinder as being the misfire. If anything here doesn't make sense or you'd like some pictures or further explanation, just let me know.
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Tuesday, July 19th, 2011 AT 11:54 PM

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