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Old 11-26-2009, 09:44 PM
BodhiBenz1987's Avatar
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Join Date: Dec 2004
Location: East Coast
Posts: 3,005
Idle control cable ... my 240D's new puzzle

After an epic effort to upgrade my 240D's glow plugs to fast-glow, including the relay, it starts gloriously. Here's the bad news: it idles so slow, it just dies unless I rev the engine a bit, and even then once it goes back down to idle it's pretty violent (not missing at all, just shaking a lot). It probably was caused by my messing around under the cluster to fit the new relay in ... probably jostled the idle control cable. However, the idle cable has not worked since I bought the car. After I fiddled around with it, it now has mild effect, but doesn't last ... i.e., the idle drops back down really low or is just plain erratic. I can physically pull the cable with my hand and the idle smooths out, but it just drops back. By the way, it came with this delightful wire on it:

Is this something I should try to mend by removing and cleaning the cable or should I just buy a new one and replace it? Or do I have another problem?
I was so proud of my glow plug work ... yesterday this car started SO fast, dead cold at 40 degrees ... which would have been a huge struggle with the old plugs. Today, new issue. At least it never lets me get bored!
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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)
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