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Old 01-31-2004, 01:17 AM   #1
paul
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Unhappy tp part question HELP

first question has anyone had problems with idling do to a bad o2 sencor. dose it make the cars revs go up and down. any help in this area would be great.

Second question if codes do come up where would they be displayed

i posted this up on this forum because the most people would look at it. i need help ASAP
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Old 01-31-2004, 01:38 AM   #2
paul
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bump i need a reply fast
come on help a brother out
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Old 02-02-2004, 11:42 PM   #3
crazyvadim
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a bad O2 sensor will give u a check engine light??
I would suggest to whoever owns a BMW to have a scan tool in hand.
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Old 02-03-2004, 12:01 AM   #4
tiestoE36
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Re: tp part question HELP

Quote:
Originally posted by paul
first question has anyone had problems with idling do to a bad o2 sencor. dose it make the cars revs go up and down. any help in this area would be great.

Second question if codes do come up where would they be displayed

i posted this up on this forum because the most people would look at it. i need help ASAP
i have two out of 4 o2 senstors busted, but i didnt really notice a idle difference. but i do have a idle problem, i think its the alternator, the idle gets worse as i power more things, like fog lights or power windows.
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Old 02-03-2004, 06:49 AM   #5
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When I had a bad O2 sensor all I got was the CEL. My friend had a bad ICV (idle control valve) and it made his revs go up and down like crazy. Mine is starting to go bad so the revs jump from time to time.
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Old 02-03-2004, 06:54 AM   #6
SickFinga
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bad mass airflow meter will make your revs to go up and down
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Old 02-03-2004, 11:06 AM   #7
paul
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how do you check engine codes on a 92 325i . The car revs but i don't et any check engine light.
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Old 02-03-2004, 11:23 AM   #8
Jon@Bimmersport
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u need a BMW scan tool..the code reader i think www.turnermotorsport.com or www.bavauto.com sells em
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Old 02-03-2004, 01:02 PM   #9
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You can do the pedal test on yours to get the code. My brother's celica had the same syptoms and it was a dirty AFM.

edit: here's a link, although you mentioned you're not getting an engine light.

http://www.unofficialbmw.com/repair_faqs/motronic.html

Last edited by WASABI; 02-03-2004 at 01:07 PM.
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