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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

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 12-28-2012, 02:40 PM
dprater2008 dprater2008 is offline
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Mein Auto: 96 neon, 92 325is
Yet another problem.

This just started happening like a week ago and has gotten worse with the cold. My car is very cold blooded as I'm sure I'm not the only one. When I'm driving and comming to a stop, and push in the clutch my rpms drop very quickly and then continue to go up and down from like 200-1000rpm and when your driving it chugs every so often it kind of feels like the engine is missing. The tach does not move when it does this but the needle on the mpg gauge does. When it's warm the rpms don't fluctuate as much when the clutch is in as it does cold. But is still jerky when your driving, it's most noticeable when in 4th gear city driving and on snowy roads. And when the engine is cold when I go into 5th gear the tach drops so fast it's almost like turning the key off but it dosent do it when warm. And I do not take the car over 2000rpm until it has moved out of the blue section on the temp gauge. Their is no cel on. Just some triangle with an exclamation point which I'm sure is tc related or abs. I just want to know why my car runs like ass. Why it's revving itself and why it jerks while driving. I know it could be a variety of things like a coil pack, spark plug, which I have just replaced them with e3's. fuel filter, iac, tps. I would appreciate all other opinions before I start replacing things. Also I'm getting less mpgs too. Thanks everyone
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  #2  
Old 12-28-2012, 02:49 PM
BimmerBoy1986 BimmerBoy1986 is offline
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Check to see if any codes are being thrown.
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  #3  
Old 12-28-2012, 05:48 PM
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drivinfaster drivinfaster is offline
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the triangle is probably traction control??

i figure it sounds to me like you should check the following:

torn intake boot
dirty icv
worn plugs
faulty coil(s)
oil in plugwells
dirty injectors

also, how old is the fuel filter?? fuel pressure??




df
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Old 12-28-2012, 06:59 PM
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dc_wright dc_wright is online now
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Mein Auto: '96 328iC, '04 325Ci
Don't overlook the ASC fault. The ASC system is hooked into the brake system and has a separate throttle actuator.
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Old 12-28-2012, 07:59 PM
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drivinfaster drivinfaster is offline
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that could be simple to diagnose, though, no?? just unplug the actuator motor to the asc throttle valve and if the symptoms go away, then it's something in the asc that is causing the fault.





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Old 12-28-2012, 08:12 PM
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dc_wright dc_wright is online now
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Unplugging might make a difference in the idle characteristics, but the ASC computer still has override on the brake system. It can't hurt anything to try it and see what happens.
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Old 12-28-2012, 08:30 PM
dprater2008 dprater2008 is offline
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Mein Auto: 96 neon, 92 325is
Thanks for all the quick replies as soon as I have access to my garage ill check on those things. Also my abs does not work what so ever along with my traction control. I do have a k&n cold air intake if that would make a difference. I just replaced the plugs a couple weeks ago and found oil in the plug wells more than I would like to say. New valvecover gasket should fix that. But I also want to replace the seals on the vanos if I do that so it's just one shot. The soonest i will be able to do any of this is next week. So ill post back if anything changes. Again thanks for the info.
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