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E21, E30 General discussion and technical help for 1975-1991 3 series cars.

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Old 05-31-2006, 12:39 AM   #1
Numark318i
 
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Engine stops oddly.

so i have nmoticed that when i turn my car off the engine keeps turning and it sounds like it rotates a couple of times after the explosions stop.

What could be causing this?

I put 91 octane in the car.
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Old 05-31-2006, 01:12 AM   #2
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that sounds really weird, the engine should not keep moving.
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Old 05-31-2006, 01:22 AM   #3
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What could be doing that? is the car automatic or manual?
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Old 05-31-2006, 05:10 AM   #4
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Quote:
Originally Posted by Numark318i
so i have nmoticed that when i turn my car off the engine keeps turning and it sounds like it rotates a couple of times after the explosions stop.

What could be causing this?

I put 91 octane in the car.
Do you mean it's "dieseling"? (like running on) If that's the case after you put in 91 octane could be a carbon build up causing pre-ignition. When was last plug change? Does it do it everytime you turn it off or only after certain circumstances? (more info please)
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Old 05-31-2006, 11:56 PM   #5
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Quote:
Originally Posted by c1apton
Do you mean it's "dieseling"? (like running on) If that's the case after you put in 91 octane could be a carbon build up causing pre-ignition. When was last plug change? Does it do it everytime you turn it off or only after certain circumstances? (more info please)
yes dieseling if thats what u call it.

Changed plugs about 15-20k ago. New wires also. Bosch all around.

Usually only does it when its hot, when i take a drive longer then an hour or when i drive spritedly.
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Old 06-01-2006, 01:29 AM   #6
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Run a bottle of Techron or STP gas treatment and fill up tank at same time - see if that helps. It sounds suspiciously like bad fuel and/ or moisture in gas
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