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IDLE ISSUE

 
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mrmopardoctor



Joined: 25 Oct 2008
Posts: 26

PostPosted: Sat Nov 08, 2008 1:39 am    Post subject: IDLE ISSUE Reply with quote

87 325is..idle great when its cold but when it warms up it has a miss and a slight hesitation just above idle...possible coolant temp sensor?? any ideas on what to look for?? anyone heard of a cylinder indentication sensor??if so what does it do and where does the sensing part of it attach??
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maxinjaxin



Joined: 15 Feb 2008
Posts: 117
Location: Collinsville, MS

PostPosted: Sat Nov 08, 2008 9:17 am    Post subject: Reply with quote

possible vacume leaks< air mass meter boot? I had the same thing goin on &
found several leaks & my boot had a dry rotted area in it.
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smithpatrick



Joined: 05 Nov 2007
Posts: 44
Location: Southern New Jersey

PostPosted: Thu Oct 22, 2009 8:50 am    Post subject: cylinder indentication sensor Reply with quote

The cylinder indentication sensor is an indunceance sensor on cylinder #6
end of cycle
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5 e30's 84, 87, 3 90's
4 Boxer motorcycles R75/5, 2 R60/6, and a R90/6
1995 e36 320i auto euro specs from canada, 98 323i auto
2001 e46 325i manual
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jlevie



Joined: 01 Jan 2005
Posts: 553
Location: Huntsvile, AL

PostPosted: Thu Oct 22, 2009 12:25 pm    Post subject: Reply with quote

The Cylinder ID signal is provided via an inductive pickup on the #6 ignition wire. The DME uses that signal for injector timing. Without the signal both injector banks fire at the same time. The engine will run okay that way, but tends to run a bit rich.

If the ignition wires on the car don't have the Cylinder ID pickup, you'll need to replace the wires with the correct parts.

As to the idle problem, there are a number of possible causes:

Mis-adjusted valves
Intake leaks
Aged O2 sensor
Bad ignition wires, plugs, distributor rotor/cap
Bad DME temp sensor
Fuel system or injector problems
Bad AFM
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Spec E30 #96 (NASA-SE)
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Camina



Joined: 03 May 2004
Posts: 99
Location: Boston, MA

PostPosted: Mon Jun 10, 2013 10:53 pm    Post subject: Reply with quote

I have an idle problem when the car starts. I have to give it some gas sometimes to keep it going. Then, after a few minutes the car is fine. It's only when the car is cold I have the problem. I had some hoses replaced, plugs, dist cap, and the 0/2 sensor. What could be the cause ?
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1988 325, "super eta", 300k+ miles
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85-325e



Joined: 30 Jun 2002
Posts: 4711
Location: Southampton, NY

PostPosted: Tue Jun 11, 2013 3:14 pm    Post subject: Reply with quote

Check the BIG hose from the AFM (Air Flow Meter on the side of the filter box) to the throttle body. If there are holes, they would probably be on the bottom side of the hose, so take it out, and check it well. A vacuum leak can cause havoc. Also, check to see that the oil filler cap is securely on, and that the dip stick is sealing well. On the e cars, there's an idle control valve but the i series cars don't have it.

Check ALL hoses... one lousy leak can ruin your day.
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Cosmo - 1985 BMW 325e, Single Owner, 235,000+ ORIGINAL miles and still going strong!

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