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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 02-07-2008, 12:07 AM
inspir3 inspir3 is offline
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Location: SA
 
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Mein Auto: BMW 316
Question: Shaking and jerking car, RPM going up and down

Lately, the car seems to be jerking and shaking and the RPM goes up and down while stopped at the lights or stationay. The jerking lessens when i put it into neutral. It is a automatic '94 316 model BMW
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  #2  
Old 02-07-2008, 12:14 AM
Andrew_BR Andrew_BR is offline
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Location: Brazil
 
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Mein Auto: German 95 325i Coupe
Only on low RPMs? or always?
It may be spark plugs or cables....
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  #3  
Old 02-07-2008, 02:08 AM
inspir3 inspir3 is offline
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Mein Auto: BMW 316
RPM moves up and down only when the car is stationary i.e stopped at the lights. sometimes when the RPM goes up n back down quickly the car jerks forward a bit.
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  #4  
Old 02-07-2008, 02:09 AM
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stephenslyman stephenslyman is offline
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Location: Kildare, Ireland
 
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Mein Auto: 525mtech|'74 o2tii| 72mg
few things..... from my experience. il go from easy to not so easy.

a) cracked in your air intake pipes.(check for cracks around idle control valve part number 6 on link) the cracks can take in unneccesary air and messing with the fuel - air ratio. which happened to be a problem for me.
http://www.realoem.com/bmw/showparts...81&hg=13&fg=15

b) the idle control valve could be faulty.(i bought new one and wasnt the problem for me!!)
c) o2 sensor http://www.pelicanparts.com/bmw/tech...-O2_Sensor.htm

d) gunk in your engine throttle bore
http://www.2carpros.com/how_to/how_to_tune_up.htm

e) check your plug leads for cracks, they might be arcing off the engine head.


to date i fixed all these but my car still idles irratically sometimes so i still haven't got a complete fix but its ALOT BETTER THAN IT USED TO BE
Steve
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Old 02-07-2008, 02:28 AM
inspir3 inspir3 is offline
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Mein Auto: BMW 316
thnks alot for that. i'll take a look at those things. update ya on any improvements!
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  #6  
Old 02-07-2008, 03:54 AM
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Pirate_copy Pirate_copy is offline
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Mein Auto: M3
Could also be your Intake Temp Sensor. Mine is playing up too and just keep forgetting replace it

Get your codes pulled, you may just get an error code if your car supports it. if it doesn't work after a few attempts, you will need to get a scan tool or get a garage/Autozone to pull them for you - http://www.forum.edirty6.com/showthread.php?t=65 (top post)
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