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Old 03-30-2004, 08:31 PM   #1
BMW_M52_M20
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325E Hunting problems.......

Well, my idle is a bit irratic. It revs up and down about 200rpms. I have replaced the idle control valve and module, spark plugs, filters, cracked vacuum hoses/intake leak. I picked up a used (in very good condition) Air Flow Meter. I talked to someone with a similar problem, and they said it fixed the problem on there e30.

I am hoping this will work, just letting you guys know if anyone has experienced the same problem.
Jay
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Old 03-30-2004, 09:00 PM   #2
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i had the same problem when my car was idling. it was irratic. it took it to Charlie (bimmersport) and he replaced the Idle Control Valve and now its works perfectly.
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Old 03-30-2004, 09:06 PM   #3
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Don't know if this is true but I heard that a CAI can possibly screw up the idle on an M20 engine. Has anyone else run into that situation???
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Old 03-30-2004, 09:33 PM   #4
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Quote:
Originally posted by M50E30
Don't know if this is true but I heard that a CAI can possibly screw up the idle on an M20 engine. Has anyone else run into that situation???
I thought about that but it has done ever since I have bought it which came with the stock airbox. When I put my new meter in I am putting the stock airbox back in, to avoid any problems in the future.
Jay
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Old 03-30-2004, 10:21 PM   #5
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Re: 325E Hunting problems.......

Quote:
Originally posted by BMW_M52_M20
Well, my idle is a bit irratic. It revs up and down about 200rpms. I have replaced the idle control valve and module, spark plugs, filters, cracked vacuum hoses/intake leak. I picked up a used (in very good condition) Air Flow Meter. I talked to someone with a similar problem, and they said it fixed the problem on there e30.

I am hoping this will work, just letting you guys know if anyone has experienced the same problem.
Jay
It's probably the o2 sensor. It's a pain in the ass to change, but will feel like a new car when it is done.
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Old 03-30-2004, 10:25 PM   #6
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Mine did that, there is a litle screw on top of the idle control valve. It's just a vacuum adjuster from what I know. Anyway, playing with that a little bit solved my problem.
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Old 03-30-2004, 10:31 PM   #7
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My old 84 318i did the same thing ! played with the same screw cured it ...
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Old 03-30-2004, 10:53 PM   #8
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Quote:
Originally posted by 85eta
Mine did that, there is a litle screw on top of the idle control valve. It's just a vacuum adjuster from what I know. Anyway, playing with that a little bit solved my problem.
Nope, not with mine, doesn't do anything to help. o2 sensor is a good idea, I will pull them out at work tomorrow.
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Old 03-31-2004, 05:05 PM   #9
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Well, I installed a new o2 sensor today. The old one was pooched big time so I am glad I replaced it. It didn't solve my hunting problem though
Oh well, got one option left on the list which is the maf, so I have bought a new one.
Jay
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Old 03-31-2004, 09:12 PM   #10
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my car did that adjust the icv
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Old 04-01-2004, 12:07 AM   #11
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my car did that adjust the icv
As I said before, I have aleady done that with no luck. I think it is either the butterfly flap is staying open a bit on either the throttle body or the air flow meter.
Ripping it apart this weekend.
Jay
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Old 04-01-2004, 01:42 AM   #12
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Sorry, I didnt read all of it.

Good luck.
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Old 04-01-2004, 01:47 AM   #13
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hmm i know get my IS Headers and My IS exhaust it will run perfect
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Old 04-01-2004, 01:48 AM   #14
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Quote:
Originally posted by M50E30
Don't know if this is true but I heard that a CAI can possibly screw up the idle on an M20 engine. Has anyone else run into that situation???
Probably intakes that aren't fitting tight, causing a vacuum leak. Everything from the AFM-back is stock, so it can't affect the idle.
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Old 04-01-2004, 02:36 PM   #15
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Originally posted by Mystikal
Probably intakes that aren't fitting tight, causing a vacuum leak. Everything from the AFM-back is stock, so it can't affect the idle.
Yeah but if the AFM butterfly flap or the throttle body flap is not closing all the way, it could be causing the problem. I will check anyway this weekend, I am going to take the AFM out and throttle body and take the intake manifold off and polish it up.
Jay
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