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Join Date: Oct 2004
Posts: 19
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random missfire
1999 323i with 49k mi. check engine light came on at a stop light, then car began to idle very rough, borrowed neighbors snap on scanner and received codes, PO300 random missfire & PO304 missfire cyl.#4 I cleared the codes and took it for a ride check engine light back on and still very rough idle, checked codes, this time PO300 random missfire & PO302 missfire cyl.#2, any idea`s on what to check, or am I doomed for a trip to the dealer? any suggestions greatly appreciated.
Last edited by ONECRAZYHOUSE; 10-25-2004 at 03:32 AM.. |
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10-24-2004, 05:36 PM
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In the shop at Pelican
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Location: Los Angeles, CA
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What kind of spark plugs do you have?
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10-25-2004, 07:42 AM
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The factory 100k mi plugs, bosch I think, also now the random miss codes are for all cyl`s and I`m now getting fuel trim rail codes
Last edited by ONECRAZYHOUSE; 10-25-2004 at 08:54 AM.. |
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10-25-2004, 08:50 AM
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In the shop at Pelican
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10-25-2004, 08:51 AM
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also is it my understanding that because this is a 1999 4 door it is a e46?
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10-25-2004, 08:58 AM
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In the shop at Pelican
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I cant tell you. Do you have the new or old body style
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10-25-2004, 08:59 AM
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I would call it "new" style
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10-25-2004, 09:01 AM
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In the shop at Pelican
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Location: Los Angeles, CA
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get me the last seven digits of your VIN and I can confirm
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10-25-2004, 09:03 AM
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the last 7 fp51934
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10-25-2004, 09:07 AM
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In the shop at Pelican
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its an E46
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10-25-2004, 09:10 AM
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any more ides on the random miss at all cyl`s now?
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10-25-2004, 09:13 AM
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In the shop at Pelican
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WHat kind of a tool did you use to get those codes?
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10-25-2004, 09:19 AM
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snap on scanner using the odb2 generic code reader
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10-25-2004, 09:21 AM
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any other ideas where to look?? would the fuel rail trim codes be caused by the miss fire or vice versa? I have been told by my two local dealers that they sell a awful lot of coil packs( set of 6) for this car, I`m wondering if its the coil pack`s that are bad, I`m open for all suggestions
Last edited by ONECRAZYHOUSE; 10-26-2004 at 12:18 PM.. |
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10-25-2004, 12:29 PM
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I just replaced all 6 coil packs and still the same problem, very bad miss at idle, sounds like someone tapping the intake with a ballpeen hammer, and the smell of rotten eggs at the tailpipe, any ideas??
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10-27-2004, 11:00 AM
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just guessing but maybe its a fuel injecter(s) bad. I have a friend that her check engine light came on found out it was injectors were bad on an american car thou it was running really rough were her symtems
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10-27-2004, 12:15 PM
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Often, the sulphur smell (rotten eggs) indicates a bad catalytic converter. Not sure how that could cause a misfire code or a fuel rail trim code. (Heck, I'm not even sure what "fuel rail trim" is!!)
--DD
__________________
Pelican Parts 914 Tech Support A few pics of my car: http://www.pelicanparts.com/gallery/Dave_Darling |
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10-27-2004, 02:26 PM
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well after the new coil packs the codes were,
fuel bank #1 fuel bank #2 randon missfire at cyl`s 1,3,5,6, so I guess I just might have to go to the dealer to let them hook it up to the computer ($95.00) and let me know what the problem is, I hope it is something stupid like the plugs ,but if it were, why the codes at all cyl`s? for random missfire |
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10-27-2004, 07:01 PM
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In the shop at Pelican
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Quote:
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10-29-2004, 06:20 AM
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if it is a broken cat would that be a item covered by emissions warranty? do you think that this would be a problem even though it has only 49k mi?
Last edited by ONECRAZYHOUSE; 10-30-2004 at 03:18 AM.. |
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10-29-2004, 07:30 AM
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74 Porsche 914 2.0 
