PDA

View Full Version : 325E Hunting problems.......


BMW_M52_M20
03-30-2004, 09:31 PM
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

Acidblast
03-30-2004, 10:00 PM
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.

M50E30
03-30-2004, 10:06 PM
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???

BMW_M52_M20
03-30-2004, 10:33 PM
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

BimmerKris
03-30-2004, 11:21 PM
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.

85eta
03-30-2004, 11:25 PM
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.

John Hubbert
03-30-2004, 11:31 PM
My old 84 318i did the same thing ! played with the same screw cured it ...

BMW_M52_M20
03-30-2004, 11:53 PM
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.

BMW_M52_M20
03-31-2004, 06:05 PM
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:mad:
Oh well, got one option left on the list which is the maf, so I have bought a new one.
Jay

BMW BMXer
03-31-2004, 10:12 PM
my car did that adjust the icv

BMW_M52_M20
04-01-2004, 01:07 AM
Originally posted by BMW BMXer
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

BMW BMXer
04-01-2004, 02:42 AM
Sorry, I didnt read all of it.

Good luck.

ZiMMie
04-01-2004, 02:47 AM
hmm i know get my IS Headers and My IS exhaust it will run perfect :P

Mystikal
04-01-2004, 02:48 AM
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.

BMW_M52_M20
04-01-2004, 03:36 PM
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

chromius
04-01-2004, 03:39 PM
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???

Actually I have seen that...but its due to an over oiled K&N cone filter...the oil gets sucked into the intake and leaves gunky deposits on the ICV and the Throttle body and AFM. As long as you don't over oil your fine

FRANKYBIMMER
04-01-2004, 04:32 PM
WHEN YOU PULL THE PLUG OFF OF THE IDLE CONTROL VALVE DOES THE IDLE STABALIZE? OR DOES IT REMAIN AN ERATIC IDLE IF SO YOU MAY HAVE A DEFECTIVE I C VALVE

hovae30
04-03-2004, 05:10 AM
more than likely it's the throttle body check and clean it should work