E 30/ Need advise on a serious fast idle - BMW Forum - BimmerWerkz.com
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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#1 (permalink) Old 02-07-2009, 09:22 AM
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Angry E 30/ Need advise on a serious fast idle

My 1986 325e idle is extremely high when sitting still. Even with the idle adjustment screw backed all the way out. Checked hoses and did'nt find any leaks. I'm at a lost. Need Help.

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#2 (permalink) Old 02-07-2009, 12:20 PM
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Sounds like you either have a vaccum leak on an air intake hose or the MAF ( mass air sensor) has died. Unplug the maf and see what happens,situated between the air box and intake manifold

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#3 (permalink) Old 02-07-2009, 05:21 PM
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Could be the idle control unit above the glove box...Usually you get a bouncing idle when it goes bad, but you never know...
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#4 (permalink) Old 02-07-2009, 07:05 PM
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check the throttle plate make sure it isnt hanging open and your car has an AFM not a MAF

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#5 (permalink) Old 02-09-2009, 10:44 AM
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Maibe the valve for idle speed its problem.Its conected on the left side of big air inteake hoses between the air box and inteake manifold.Try to clean that valve with wd40
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#6 (permalink) Old 02-09-2009, 07:23 PM
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I had the same problem either you tps is bad or you just have to adjust it when mine went bad it would bounce from 700rpm to around 2k rpm then at some points it would just stall if you do replce it make sure it is adjusted right when you put it in or it will either idle high or not at all
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