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  #1  
Old 06-21-2006, 07:56 PM
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Do I need an oxygen sensor?

I have a 1987 mercedes 190E, i just had it smogged and it passed, but the hydrocarbons are pretty high. Doing some research online, it said that it may need a new sensor. As far as I know, it;s the original one in there (244k miles)
Is this a fairlyeasy thing to replace?

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  #2  
Old 06-21-2006, 08:00 PM
Monomer's Avatar
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Location: Detroit, MI
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I'd put a new one in.



given a lot of PB is used, and is soaked in, yes; it's easy.
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  #3  
Old 06-21-2006, 10:13 PM
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If it is the original one and still works, maybe you could sell it back to Bosch for analysis on how it lasted as long as it did
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  #4  
Old 06-22-2006, 11:25 AM
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Quote:
Originally Posted by hockey7711
I have a 1987 mercedes 190E, i just had it smogged and it passed, but the hydrocarbons are pretty high. Doing some research online, it said that it may need a new sensor. As far as I know, it;s the original one in there (244k miles)
Is this a fairlyeasy thing to replace?
Your sensor is too old. Change it, emmisions and fuel economy will improve. However, a vacuum leak can lead to high HC readings. Check for a leak first.
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  #5  
Old 06-26-2006, 02:27 PM
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Dealer response

I just called a local MB dealer to findout what it would cost to change the o2 sensor. I told him that I have 244K and never had it changed. He said that maybe it doesn't need it....bring it in for an estimate, it may be something else.
He suggested a cat. converter. I changed that 2 years ago.
As usual they want me to bring it in to give me a list of work that it needs.
So predictable.
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  #6  
Old 06-26-2006, 02:30 PM
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Pb?

Quote:
Originally Posted by Monomer
I'd put a new one in.



given a lot of PB is used, and is soaked in, yes; it's easy.

What is PB?
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  #7  
Old 06-26-2006, 07:22 PM
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Join Date: Sep 2004
Location: Seattle
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I am guessing he means lead. Oil consumption can also cause the O2 sensor to become sluggish.

Mike
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  #8  
Old 06-26-2006, 07:27 PM
Fixin' anything moving
 
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I am assuming he means a liquid wrench and not lead (e.g., rust away, the spray that loosens sticky bolts). Replace it - you can get it realitvely nexpensive on ebay - you can rent a socket usually from autozone for free. Then all you need is to soak it in for a day (several applications a day_ and have a breaker bar and some muscle.
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  #9  
Old 06-26-2006, 08:49 PM
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Location: Portland, ME
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PB is PB Blaster penetrating fluid.

Liquid Wrench is usless as a penetrant for freeing up rusted fasteners -- it's a good cleaner, and wet lubricant. But when it's gone, so are the lubricating properties.

Several days of multiple applications of PB Blaster can save you a lot of headaches.

Jeff Pierce

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Current Vehicles:
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'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
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