Idle Issues
10-25-2007 | 06:06 PM
#31
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Joined: Jan 2004
Posts: 1,078
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From: Austin, TX
On this parts web page for the early cars, it also shows the same auxilary air valve:
http://www.paragon-products.com/category_s/402.htm
On this parts web page for the late cars (page 2), it shows both the auxilary air valve (for early cars, which I think is a mistake) and the Idle Control Valve (for late cars):
http://www.paragon-products.com/category_s/79.htm
Confused yet?
10-25-2007 | 10:56 PM
#33
Wax On, Wax Off
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From: 5280 ft above the sea
Violent shaking. The idle is constant and very settled at ~850-900RPM. The steering wheel is shaking though, as is the dash. If I touch the gas even slightly and revv the engine up to 1000+, the car gets really quiet and fine. But below 1000rpm, the front end seems to shake pretty nuts. There's no other shaking at any rpm, which leads me to believe that it's not a balance belt issue (timing or condition), but rather just a resonance vibration I'm feeling through the steering shaft. What might cause this?
10-26-2007 | 12:36 PM
#34
Thread Starter
Drifting
Joined: Oct 2002
Posts: 2,373
Likes: 1
From: Memphis, TN
Why is everything cheaper for the BMW M series?!!?
FYI: reference sensors are 1/2 the cost when you search for the 88 M3 sensors and now The Aux air valve is the same as the M6 from 88... and the cost difference is $229 from Porsche part sources, $56 from BMW sources (yes, same Bosch part number)!!!
http://www.vertexauto.com/ShowItem/3...r%20Valve.aspx
FYI: reference sensors are 1/2 the cost when you search for the 88 M3 sensors and now The Aux air valve is the same as the M6 from 88... and the cost difference is $229 from Porsche part sources, $56 from BMW sources (yes, same Bosch part number)!!!
http://www.vertexauto.com/ShowItem/3...r%20Valve.aspx
10-29-2007 | 10:46 AM
#35
Thread Starter
Drifting
Joined: Oct 2002
Posts: 2,373
Likes: 1
From: Memphis, TN
Today on the way to work it was pretty cold, but the car was a little different than I'd seen it. It was jumping between 900 and 1200 idle a couple times and then settling at 1200...
10-30-2007 | 02:57 AM
#36
Racer
Joined: May 2007
Posts: 419
Likes: 0
From: Atascadero, Ca
I know it may sound like a load of s**t but possibly try a bottle of injector cleaner? It seemed to get rid of MOST of my surging and misfiring, to the point where it was unacceptable to the passenger. (I also cleaned out my ISV as stated before and readjusted my idle with the o2 disconnected and it seemed to REALLY help the surging idle)
10-30-2007 | 09:32 AM
#37
Instructor
Joined: May 2003
Posts: 229
Likes: 1
From: State College, PA
out of time balance shafts will shake violently twice through the RPM range. I believe at Idle, and 4500 RPM. Also, when were your motor mounts last replaced?