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Old 10-26-2007, 07:15 PM   #1
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Car threw CEL today...

So today driving through town I noticed that the car had a really lumpy idle at the stoplight. When I took off I could still hear that the car was "lobeing"; the tach wasn't showing it but I could definately hear it out of the exhaust. Even under throttle I could still hear it. I stopped for gas; & when I started the car again; it was idling fine; but the Check Engine light came on. It drove just fine; seemed to accellerate as good as it always did. Even ran it up to 6,000 rpm's a couple of times through the gears & everything seems to be working normally.

So just a couple of questions:

Will any OBD scanner be able to find out what the code is; or does it have to be for BMW?
Is there a way to reset it without a scanner?
Any ideas what may have caused my idle glitch? Why would it clear up just by restarting the car?

BTW car is a '94 318 M42 engine.

Thanks for any help!
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Old 10-27-2007, 01:13 AM   #2
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If you have a 94, you can get the code through the pedal pump technique.

Turn the car to on without switching on the engine, then immediately full throttle 5 times. Wait a few seconds, the check engine light will start flashing. Count the number of flashes and that will correspond to the trouble code.

Reset by pulling the battery terminal for 30 seconds.
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Old 10-27-2007, 08:38 AM   #3
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Hey thanks! Will have to try that later & see what comes up! I'm guessing it'll be a misfire code of some sort.
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Old 10-28-2007, 01:15 AM   #4
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Well, I managed to try that out. If I did it right I got code #1226 - knock sensor #2.
Anyone with an idea of maybe why that code would have come up?
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Old 10-28-2007, 02:14 AM   #5
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Use better gas.
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Old 10-28-2007, 09:59 AM   #6
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I try to use the same gas at every fill-up; sonoco 91. Just can't justify putting 94 into a 318. If I get stuck I will use Petro-Can 91; but 95% of the time it's sonoco.
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Old 10-28-2007, 11:36 AM   #7
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try going to a diff gas station, u never know
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Old 10-30-2007, 10:45 AM   #8
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that happened to me too, i erased the code and ignored it..worked like a charm
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