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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 04-03-2012, 07:27 PM   #1 (permalink)
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E30, check engine light

My 1990 E30 gets a check engine light at idle sometimes, and it seems to only get it when idling for a while, but as soon as i rev the engine, it goes away. What can cause this kind of check engine light?
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Old 04-03-2012, 10:59 PM   #2 (permalink)
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Have you heard of the "stomp test" before? Stomp the pedal to the floor 5 times in 5 seconds and it will display a fault code. Stomp it down again 5 times in 5 seconds for the next code until you see "1000". Below is a link to common E30 fault codes

OBD1 Code Definitions - After Stomp Test - R3VLimited Forums

This thread talks a little about code reading and different options:

Engine Code Reader - Bimmerforums - The Ultimate BMW Forum
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Old 04-03-2012, 11:26 PM   #3 (permalink)
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Thank you, Lord vader, I have heard of the stomp test, just havent been able to do it yet.
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Old 04-12-2012, 02:16 AM   #4 (permalink)
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Originally Posted by m20enginebuilder View Post
My 1990 E30 gets a check engine light at idle sometimes, and it seems to only get it when idling for a while, but as soon as i rev the engine, it goes away. What can cause this kind of check engine light?
what happend is that you had a fault code in your engine system.
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Old 04-12-2012, 11:18 PM   #5 (permalink)
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This guy is just a spammer. The product in the link is cheap china crap. Don't even bother clicking it.

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Originally Posted by kenvnll View Post
use car diagnostic tool check your engine,
BMW ICOM A B C you can have a try.
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