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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 12-14-2008, 01:38 PM   #1 (permalink)
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Question idle help needed.??

hello to all
i did a search but found no fix only unanswer questions
i have a 4/92 325i sedan car has been good then the last few days idle goes
to 1000 to 1300 and it won't come down only a few times did it come down but as fast that it did it goes back up the minute i hit the gas.
i took the icv out 2 times spray it with carb cleaner seem to work for a minute. second if i tap on the housing with a long screw driver while the car is running the idle goes down a little bit. if i disconnect the electrical switch to the icv then the idle surges so i'm assuming the icv is ok.??? any help or guidance is more than needed thanks
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Old 12-14-2008, 03:28 PM   #2 (permalink)
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Do you have a MAF or MAS fitted to your intake??
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Old 12-14-2008, 03:38 PM   #3 (permalink)
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Do you have a MAF or MAS fitted to your intake??
what is the difference?i'm guessing mass
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Old 12-14-2008, 03:46 PM   #4 (permalink)
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They are one of the same basically , you hav'nt answered? do you have one fitted? it will be between your air box and engine in laymans terms, with a connector plugged in the top/side.
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Old 12-14-2008, 03:51 PM   #5 (permalink)
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They are one of the same basically , you hav'nt answered? do you have one fitted? it will be between your air box and engine in laymans terms, with a connector plugged in the top/side.

yes between airbox with a connector on the side
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Old 12-14-2008, 03:58 PM   #6 (permalink)
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Ok, I will say now, cast in stone!! thats your problem!, Ok, pull it out and clean with Meths and put back in, if still the same new one required.
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Old 12-14-2008, 04:02 PM   #7 (permalink)
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Ok, I will say now, cast in stone!! thats your problem!, Ok, pull it out and clean with Meths and put back in, if still the same new one required.
clean with Meths ??????
also how do i check the TPS
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Old 12-14-2008, 04:12 PM   #8 (permalink)
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Leave the TPS alone, just try the MAF/MAS, quick way to find out if its the MAF unplug, if nothing changes thats your problem.
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Old 12-14-2008, 04:15 PM   #9 (permalink)
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Leave the TPS alone, just try the MAF/MAS, quick way to find out if its the MAF unplug, if nothing changes thats your problem.
ok i will try it in a minute i'll post back
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Old 12-14-2008, 04:35 PM   #10 (permalink)
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ok i just tried it let call warm up from been cold all day temp is in the middle nice heat coming out and the idle is at 600 rev it a few times came back down to 600 i'll try it tommorrow when i drive it and report thanks for the reply
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Old 12-15-2008, 01:30 PM   #11 (permalink)
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ok update this morning on my way to work
every time i had to stop engine rev stood around 1000rpms the fell back down to 600 i'll see what happens on the way home i hate intermitten problems
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Old 12-16-2008, 04:51 AM   #12 (permalink)
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I would say its the MAF/MAS playing up, if you do get a new one DO NOT buy a cheap one get a Bosch one with the same part number.
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Old 12-16-2008, 10:39 AM   #13 (permalink)
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have you checked for any vacuum leaks?
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Old 12-16-2008, 10:39 AM   #14 (permalink)
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Do you have a MAF or MAS fitted to your intake??
I didn't realize there were any e36's without them?
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Old 12-16-2008, 01:11 PM   #15 (permalink)
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have you checked for any vacuum leaks?
yes all the basics have been cover from front to back
this all started while waiting for a light the guy next to me with what seem a very powerfull cb radio every time i see him squeeze the microphone my idle would jump then it has been doing it since then like rf got in to electronic components.??
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