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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 12-23-2004, 09:55 PM   #1 (permalink)
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Thanks BMDubya and to anyone to give me further insight toward a high idleing but smooth running, clean ex-fumes (despite rattling cat.), regardless hot or cold. Can't find ICV in Bentley. Checked the advanced vacuum solenoid. drenched the vac. hoses w/ carb cleaner and well nothing further.

She's an 85 318i with over 350k mi, but still fun to drive, and fires on the first crank.

New cat needed? Could this prolong idle hot and cold?

Thanks and happy holidayz

Ty
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Old 12-23-2004, 10:03 PM   #2 (permalink)
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My 87 325e had a broken head bolt under the valve cover and it created a high idle. Replaced the bolt and the idle went back to normal.
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Old 12-27-2004, 12:03 AM   #3 (permalink)
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its the ICV is that's connected to your air flow boot that's between air box and throttle body. how do you clean ICV?
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Old 12-27-2004, 12:17 AM   #4 (permalink)
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pull it out and drench it with carb cleaner and WD-40
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1995 BMW 540i/6:
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Old 12-27-2004, 12:18 AM   #5 (permalink)
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if the car is taking a long tim to heat up its the thermostat almost guaranteed....replace it!!
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1995 BMW 540i/6:
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1985 VW Scirocco: Too many mods, money pit*Sold*
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Old 12-27-2004, 08:44 AM   #6 (permalink)
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My trouble is a high, cold and hot engine idle. Runs smooth. Intake boot is fine; no obvious split hoses. Thermostat reads normal, core is not an issue.

Looking under the metal cover (fixed to the head cover) -I can't see it clearly. the throttle cabels (2) and the "lever" they are fed through seem like something one could adjust AT THE LEVER. The lever looks spring loaded and you can get your index finger on the thing to raise the idle. I wonder if you can adjust that to release a mm or 2 further to lower the idle.
Someone said the cold start injector needs to be checked. I guess if it were stuck then it would always idle high, but
THE IDLE RISES FROM 1500 to 2000 after warming up, always!!! ghead

-the never ending vacuum leak....

thanks for the perspectives and insight
T
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Old 12-27-2004, 02:39 PM   #7 (permalink)
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DO NOT ADJUST THE IDLE!!!

IM WARNING YOU!!! Your idle will never be "Off" The way these cars are designed they idle themselves out...you gotta keep hunting...check the water temperature sensor? and did you check the O2? What about your DME?
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1995 BMW 540i/6:
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Old 12-28-2004, 11:18 PM   #8 (permalink)
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Quote:
Originally posted by BMDubya@Dec 27 2004, 02:39 PM
DO NOT ADJUST THE IDLE!!!

IM WARNING YOU!!! Your idle will never be "Off" The way these cars are designed they idle themselves out...you gotta keep hunting...check the water temperature sensor? and did you check the O2? What about your DME?
[snapback]259041[/snapback]
Immense thanks for the warning. I have not tinkered with that and I'm gald you're there, really. Thanks

The O2 sensor is next, then. Do you clean and lube both ends at mani and "upper" by habit,....I mean should I. You sound as though you've been here before.

My cat. has to be replaced soon. It's already shot. Looks like $270+ from the little online looking i have done. I read in Bentley that that f-r can cause enough heat to cause a fire as well as screwing up the DME sensory's ability to properly mix. Would you second that? Yeah I care about the environment, but little dough @ the holidayz
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Old 12-29-2004, 02:12 AM   #9 (permalink)
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Quote:
Originally posted by BMDubya@Dec 26 2004, 10:17 PM
pull it out and drench it with carb cleaner and WD-40
[snapback]258746[/snapback]
would it be a good idea to just spray some of each in bucket and soak it in there or one bucket of carb and one bucket of wd-40 or better just to spary it in there
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Old 12-29-2004, 03:12 AM   #10 (permalink)
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as i always say...it never hurts to get a second opinion...might want to put put over to the local german car shop and have then STRICTLY diagnose it...they have more equipment than you :P i admit sometimes even i will throw down $75 to have a Diag done just to avoid hunting when i feel i have hunted everything...cant put a price on piece of mind
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1995 BMW 540i/6:
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1985 VW Scirocco: Too many mods, money pit*Sold*
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Old 12-29-2004, 03:14 AM   #11 (permalink)
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Quote:
Originally posted by guywithblack88e30+Dec 29 2004, 02:12 AM--><div class='quotetop'>QUOTE(guywithblack88e30 @ Dec 29 2004, 02:12 AM)</div><div class='quotemain'><!--QuoteBegin-BMDubya@Dec 26 2004, 10:17 PM
pull it out and drench it with carb cleaner and WD-40
[snapback]258746[/snapback]
would it be a good idea to just spray some of each in bucket and soak it in there or one bucket of carb and one bucket of wd-40 or better just to spary it in there
[snapback]260146[/snapback]
[/b][/quote]
just pull it off completely and hose it out with some WD40 and let it sit for a while
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1995 BMW 540i/6:
The Calypso Beast Vid 0-70ish
1987 BMW 325es: Face & Butt Lifted/M50tu Swapped*Sold*
1985 VW Scirocco: Too many mods, money pit*Sold*
E34 Plate Filler Wanted!
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Old 12-29-2004, 03:21 AM   #12 (permalink)
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i admit i am in a similar situation with my VW Scirocco...only it wont idle out...it will just die when i let off the throttle....things i replaced:

timing
valve adjust
Distruter cap
Rotor
Plugs
Wires
fuel filter
both fuel pumps
all hoses
fuel filter
every vaccum line
every gasket
alternator

keep in mind i bought my car not idling...so now i can safely say this is the result of the previous owner messing with the idle screw...now i go adjust it cause i have done everthing else...its always the LAST resort....
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1995 BMW 540i/6:
The Calypso Beast Vid 0-70ish
1987 BMW 325es: Face & Butt Lifted/M50tu Swapped*Sold*
1985 VW Scirocco: Too many mods, money pit*Sold*
E34 Plate Filler Wanted!
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