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Old 06-15-2013, 03:28 AM
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Join Date: Jun 2013
Posts: 1
190d 4 cyl rough idle and smoking when cold

hi guys

as it says on the title, when its cold (usually in the morning) the engine rough idle and it does white smoking a lot. however, the car starting just fine and when its warm the engine running normal and no smoke.

the ignition lamp came on and shut off in 3-4 secs in the morning. i have read some posting in here said thats indicating a trouble on my glow plug. i have tested the pre glow plug relay with multimeter and it seems the circuit running fine around 1 ohm. it does mean my glow plugs in good condition. i tested the relay for voltage and it has battery voltage around 13 volt. so, why my ignition shut off quit fast?

so any thoughts what is wrong with the car?

thanks guys
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Old 06-17-2013, 08:53 AM
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Join Date: Nov 2010
Location: Ooltewah, TN
Posts: 707
Most likely, one or more of your glow plugs are bad.
You can't always get what you want, but if you try sometime you just might find you get what you need.
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Old 06-17-2013, 11:12 AM
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Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
X2, sound like a GP or 2 are marginal or not working. the best way to test besides the DVM, is to remove them and add voltage to see how hot the ends (Red) get. Even if they glow red and the ends are a darker color, toss them.

Use Anti-Seiz on the threads when replacing them back into the Head.

Caution: They do get Hot and will Burn you.

Mercedes Diesel Glow Plug Repair

there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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