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| E21, E30 General discussion and technical help for 1975-1991 3 series cars. |
05-01-2007, 11:33 AM
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#1
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Name: mzbmw325i
Title: Member
Status: Offline
Join Date: Jan 2007
User not setup in Rate My Car. Click here to set it up. Your Ride: 1991 325i; 1988 325is
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check engine light
well here it goes, last night i was driving with about 55mph, went uphill and once i was going downhill, i took my foot of the pedal, the car was still going with about 50 and i noticed my check engine light came on briefly, once i started to slow a bit and it went off. it did happen like this before, going downhill with my foot of the pedal.
can any1 explain why this happened, does it has to do with electrical or air, any advice is appreciated, i mean is it common to happen like that. |
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05-01-2007, 11:45 AM
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#2
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Name: c1apton
Title: Upgraded Member
Status: Offline
Join Date: Oct 2005
Location: Pompano Beach,Fl /Edina,Mn
Your Ride: 93 E34
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It's an electrical issue - sounds like a connection at an 02 sensor or similar loose connection. |
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05-02-2007, 11:46 AM
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#3
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Name: mzbmw325i
Title: Member
Status: Offline
Join Date: Jan 2007
User not setup in Rate My Car. Click here to set it up. Your Ride: 1991 325i; 1988 325is
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well i did replace the O2 sensor last summer, what do you mean loose connection or something? the o2 sensor plugs in pretty tight there. |
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05-02-2007, 01:49 PM
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#4
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Name: Dudesky
Title: Run Far
Status: Offline
Join Date: Apr 2005
Location: Jersey City, NJ
Your Ride: E39 530iA
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It's a guess. If not the sensor connections, maybe the relay is intermittently faulty. Or it could be something completely different. You need to read the fault code(s) stored to find out what is wrong, using the "5 stomp method" . . .
http://www.pelicanparts.com/BMW/tech...nostics%20.htm
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08-26-2007, 01:18 AM
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#5
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Name: PhotoGuy30523
Title: United Newb
Status: Offline
Join Date: Aug 2006
User not setup in Rate My Car. Click here to set it up. Your Ride: 1987 325E (I)
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