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Old 08-02-2002, 12:54 AM
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190E 2.6 Driveability Issues

My name is Kyle I recently got my first German car: 89' Mercedes 190E 2.6 with 69k .

First I have a bit of a starting problem, I have to crank on it three times to get it going when its cold. It hits on 1 or 2 cylinders than dies. I replaced the Accumulator, and it currenty holds just under 40 Psi indefinetly. When I stop, go again, it misses bad until I get past 1500 RPM than it clears up in an instant.I richend the mixture on the top of the fuel distributer( screw turns in for rich? correct?) about 1/8-1/4 of a turn (it helped or seemed too at first but now I wonder, since its started missing again). I wonder if the two problems are related? The plugs are new Bosch platnums.

I tested the temp sensor and according to the curve in the Mitchell manual its about 30 degrees off or 2-300 ohms is that close enough for these? basicly the car is at 172 degrees and it has an ohm reading that would be consistant with 145 degrees. I am also confused because a parts magazine has it listed as 4 prong sensor for an 89. but mine is a two prong. The sensor I need is the last sensor on the head closest to the firewall right?

The posts on this board are informative as well as easy to understand, I hope to share my knowledge with others now that I am a registerd user.

Thanks in advance!

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Old 08-02-2002, 10:48 AM
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Old 08-02-2002, 11:43 AM
yal's Avatar
yal yal is offline
Join Date: Oct 1999
Location: New York, Long Island
Posts: 2,704
Go and buy yourself some bosch copper plugs. They cost about a dollar and change. Replace the platinums with the copper plugs and see what happens. These cars do not like platinum plugs. For some crazy reason every store you go to tries to sell you platinum plugs for these cars and they lather you with the usual sales pitch. Take em out first and see how your idle is.

Also what color is the sensor you are talking about? Green?

Last edited by yal; 08-02-2002 at 11:50 AM.
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Old 08-02-2002, 12:32 PM
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I think its black actaully
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Old 08-02-2002, 09:24 PM
haasman's Avatar
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Join Date: Jun 2001
Location: San Francisco, CA
Posts: 3,096
Kyle Congrats on your new car! an '89 with only 69k! Wow!

I hate to keep pounding the clogged injector bell but I highly suggest you make sure your injector nozzles are clean.

I was working on a car with similiar problems ....

Something caught my eye on one of the great posts on this site: It said "add even two bottles of Techron if you think the fuel injectors are really dirty" .... so I did. I let the car idle for about 5 minutes. I raced the engine a little bit .... let it run some more. I brought the RPMs up to about 2,500 and then I heard a sound kind of like a soft "phlup" ... and WOW! The engine runs sweet and the terrible trans problems are no more.
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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Old 08-23-2002, 02:40 AM
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Ok guys-

Ive changed my plugs to Bosch coppers and have run a total of 4 cans of "Sea-Foam" through my tank. Thats two cans per tank! Nothing. Anyone have any other ideas? I am open for suggestions!

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